Skip to main content

Research Repository

Advanced Search

Outputs (77)

Opto-electrochemical variation with gel polymer electrolytes in transparent electrochemical capacitors for ionotronics (2024)
Journal Article
Kumar, C., Sebastian, A. K., Markapudi, P. R., Beg, M., Sundaram, S., Hussain, A., & Manjakkal, L. (2024). Opto-electrochemical variation with gel polymer electrolytes in transparent electrochemical capacitors for ionotronics. Applied Physics Letters, 124(11), Article 111603. https://doi.org/10.1063/5.0190801

Advanced flexible ionotronic devices have found excellent applications in the next generation of electronic skin (e-skin) development for smart wearables, robotics, and prosthesis. In this work, we developed transparent ionotronic-based flexible elec... Read More about Opto-electrochemical variation with gel polymer electrolytes in transparent electrochemical capacitors for ionotronics.

Electrochemical Capacitors based on Organic Semiconductors and Metal Oxides (2024)
Presentation / Conference
Kanathedath, J., Nair, R., Peringath, A. R., Sasikumar, A., Paul, F., Beg, M., & Manjakkal, L. (2024, February). Electrochemical Capacitors based on Organic Semiconductors and Metal Oxides. Poster presented at The 10th annual Innovations in Large-Area Electronics Conference (innoLAE 2024), Cambridge

Screen Printed RuO2 Films for Energy Storage and Electrochemical Sensors (2024)
Presentation / Conference
Paul, F., Sam, V., Uppuluri, K., Beg, M., & Manjakkal, L. (2024, February). Screen Printed RuO2 Films for Energy Storage and Electrochemical Sensors. Poster presented at The 10th annual Innovations in Large-Area Electronics Conference (innoLAE 2024), Cambridge

Multifunctional flexible and stretchable electrochromic energy storage devices (2024)
Journal Article
Manjakkal, L., Pereira, L., Kumi Barimah, E., Grey, P., Franco, F. F., Lin, Z., …Hogg, R. A. (2024). Multifunctional flexible and stretchable electrochromic energy storage devices. Progress in Materials Science, 142, Article 101244. https://doi.org/10.1016/j.pmatsci.2024.101244

Electrochromic energy storage devices (EESDs) including electrochromic supercapacitors (ESC) and electrochromic batteries (ECB) have received significant recent attention in wearables, smart windows, and colour-changing sunglasses due to their multi-... Read More about Multifunctional flexible and stretchable electrochromic energy storage devices.

Paper Supercapacitor Developed Using a Manganese Dioxide/Carbon Black Composite and a Water Hyacinth Cellulose Nanofiber-Based Bilayer Separator (2023)
Journal Article
Beg, M., Alcock, K. M., Titus Mavelil, A., O’Rourke, D., Sun, D., Goh, K., …Yu, H. (2023). Paper Supercapacitor Developed Using a Manganese Dioxide/Carbon Black Composite and a Water Hyacinth Cellulose Nanofiber-Based Bilayer Separator. ACS applied materials & interfaces, 15(44), 51100-51109. https://doi.org/10.1021/acsami.3c11005

Flexible and green energy storage devices have a wide range of applications in prospective electronics and connected devices. In this study, a new eco-friendly bilayer separator and primary and secondary paper supercapacitors based on manganese dioxi... Read More about Paper Supercapacitor Developed Using a Manganese Dioxide/Carbon Black Composite and a Water Hyacinth Cellulose Nanofiber-Based Bilayer Separator.

A high-performance pH-sensitive electrode integrated with a multi-sensing probe for online water quality monitoring (2023)
Journal Article
Uppuluri, K., Szwagierczak, D., Fernandes, L., Zaraska, K., Lange, I., Synkiewicz-Musialska, B., & Manjakkal, L. (2023). A high-performance pH-sensitive electrode integrated with a multi-sensing probe for online water quality monitoring. Journal of Materials Chemistry C, 44, 15512-15520. https://doi.org/10.1039/d3tc02646a

Water quality monitoring is an essential tool in effective environmental and public health protection. This study presents a new screen-printed Co2O3–RuO2-based electrode for electrochemical pH sensing and its comprehensive morphological, composition... Read More about A high-performance pH-sensitive electrode integrated with a multi-sensing probe for online water quality monitoring.

Sensing Technologies for Real Time Monitoring of Water Quality (2023)
Book
Manjakkal, L., Lorenzelli, L., & Willander, M. (Eds.). (2023). Sensing Technologies for Real Time Monitoring of Water Quality. IEEE Press + Wiley

Wiley_Sensing Technologies for Real Time Monitoring of Water Quality_978-1-119-77581-2.pdf

Chemical synthesis of polyaniline and polythiophene electrodes with excellent performance in supercapacitors (2023)
Journal Article
Ramesh Peringath, A., Bayan, M. A., Beg, M., Jain, A., Pierini, F., Gadegaard, N., …Manjakkal, L. (2023). Chemical synthesis of polyaniline and polythiophene electrodes with excellent performance in supercapacitors. Journal of Energy Storage, 74(Part A), Article 108811. https://doi.org/10.1016/j.est.2023.108811

The emergence of portable electronics in miniaturized and intelligent devices demands high-performance supercapacitors (SC) and batteries as power sources. For the fabrication of such energy storage devices, conducting polymers (CPs) have significant... Read More about Chemical synthesis of polyaniline and polythiophene electrodes with excellent performance in supercapacitors.

Sensor system for precision agriculture smart watering can (2023)
Journal Article
Rabak, A., Uppuluri, K., Franco, F. F., Kumar, N., Georgiev, V. P., Gauchotte-Lindsay, C., …Manjakkal, L. (2023). Sensor system for precision agriculture smart watering can. Results in Engineering, 19, Article 101297. https://doi.org/10.1016/j.rineng.2023.101297

The expansion of precision agriculture technology from commercial agriculture to home gardening is highly important due to its economic and health benefits, delivered through a new way of crop production. Additionally, it offers physiological and psy... Read More about Sensor system for precision agriculture smart watering can.

Wearable Supercapacitive Ions Monitoring Sensors (2023)
Presentation / Conference
Titus Mavelil, A. T., Chandran, A. C., Sam, V., Beg, M., & Manjakkal, L. (2023, June). Wearable Supercapacitive Ions Monitoring Sensors. Poster presented at International Women in Engineering Day 2023, University of Aberdeen, Aberdeen

Sustainable electrochemical energy storage devices using natural bast fibres (2023)
Journal Article
Manjakkal, L., Jain, A., Nandy, S., Goswami, S., Pereira, L., See, C. H., …Hogg, R. A. (2023). Sustainable electrochemical energy storage devices using natural bast fibres. Chemical Engineering Journal, 465, Article 142845. https://doi.org/10.1016/j.cej.2023.142845

Naturally abundant materials play a crucial role in the development of sustainable electrochemical energy storage (EES) devices including batteries and supercapacitors (SCs). This is due to limited available resources with regard to energy storage ma... Read More about Sustainable electrochemical energy storage devices using natural bast fibres.

Electrochemical and physicochemical degradability evaluation of printed flexible carbon electrodes in seawater (2022)
Journal Article
Franco, F. F., Dervin, S., & Manjakkal, L. (2022). Electrochemical and physicochemical degradability evaluation of printed flexible carbon electrodes in seawater. Journal of Electroanalytical Chemistry, 920, Article 116592. https://doi.org/10.1016/j.jelechem.2022.116592

The environmental impact of metals and non-degradable plastics in printed electrodes has highlighted the need of employing sustainable materials in environmental monitoring. In this work, we developed a new sustainable graphite-based paste (G-PE) pri... Read More about Electrochemical and physicochemical degradability evaluation of printed flexible carbon electrodes in seawater.

Cu2O-Based Electrochemical Biosensor for Non-Invasive and Portable Glucose Detection (2022)
Journal Article
Franco, F. F., Hogg, R. A., & Manjakkal, L. (2022). Cu2O-Based Electrochemical Biosensor for Non-Invasive and Portable Glucose Detection. Biosensors, 12(3), Article 174. https://doi.org/10.3390/bios12030174

Electrochemical voltammetric sensors are some of the most promising types of sensors for monitoring various physiological analytes due to their implementation as non-invasive and portable devices. Advantages in reduced analysis time, cost-effectivene... Read More about Cu2O-Based Electrochemical Biosensor for Non-Invasive and Portable Glucose Detection.

MnOx-Electrodeposited Fabric-Based Stretchable Supercapacitors with Intrinsic Strain Sensing (2021)
Journal Article
Pullanchiyodan, A., Manjakkal, L., Ntagios, M., & Dahiya, R. (2021). MnOx-Electrodeposited Fabric-Based Stretchable Supercapacitors with Intrinsic Strain Sensing. ACS applied materials & interfaces, 13(40), 47581-47592. https://doi.org/10.1021/acsami.1c12526

The increasing number of devices needed by wearable systems to bring radical advances in healthcare, robotics, and human–machine interfaces is a threat to their growth if the integration and energy-related challenges are not managed. A natural soluti... Read More about MnOx-Electrodeposited Fabric-Based Stretchable Supercapacitors with Intrinsic Strain Sensing.

Energy Autonomous Sweat‐Based Wearable Systems (2021)
Journal Article
Manjakkal, L., Yin, L., Nathan, A., Wang, J., & Dahiya, R. (2021). Energy Autonomous Sweat‐Based Wearable Systems. Advanced materials, 33(35), Article 2100899. https://doi.org/10.1002/adma.202100899

The continuous operation of wearable electronics demands reliable sources of energy, currently met through Li-ion batteries and various energy harvesters. These solutions are being used out of necessity despite potential safety issues and unsustainab... Read More about Energy Autonomous Sweat‐Based Wearable Systems.

Healing and monitoring of chronic wounds: advances in wearable technologies (2021)
Book Chapter
Hosseini, E. S., Bhattacharjee, M., Manjakkal, L., & Dahiya, R. (2021). Healing and monitoring of chronic wounds: advances in wearable technologies. In A. Godfrey, & S. Stuart (Eds.), Digital Health: Exploring Use and Integration of Wearables (85-99). Elsevier. https://doi.org/10.1016/b978-0-12-818914-6.00014-4

Chronic wounds are a significant health challenge that affect tens of millions of people around the world. Given the scale of the challenge, there is a need for advanced wound care and monitoring technologies. In this regard, the recent advent of wea... Read More about Healing and monitoring of chronic wounds: advances in wearable technologies.

Graphene–Graphite Polyurethane Composite Based Wristband Supercapacitor for Wearable Electronics (2021)
Conference Proceeding
Manjakkal, L., & Dahiya, R. (2021). Graphene–Graphite Polyurethane Composite Based Wristband Supercapacitor for Wearable Electronics. In 2021 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS). https://doi.org/10.1109/fleps51544.2021.9469823

Wearable and flexible electronics research has recently boomed for applications such as health monitoring and smart portable electronic devices. Considering the advances in flexible and wearable electronics, a suitable energy autonomy has become a cr... Read More about Graphene–Graphite Polyurethane Composite Based Wristband Supercapacitor for Wearable Electronics.

Flexible and Printed Potentiometric pH Sensor for Water Quality Monitoring (2021)
Conference Proceeding
Hosseini, E. S., Manjakkal, L., & Dahiya, R. (2021). Flexible and Printed Potentiometric pH Sensor for Water Quality Monitoring. In 2021 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS). https://doi.org/10.1109/fleps51544.2021.9469778

This work presents a flexible potentiometric pH sensor consisting of a graphite-CuO sensitive electrode and an Ag/AgCl reference electrode. The pH sensor was fabricated by using a simple stencil hand printing technique at room temperature. The result... Read More about Flexible and Printed Potentiometric pH Sensor for Water Quality Monitoring.

Connected Sensors, Innovative Sensor Deployment, and Intelligent Data Analysis for Online Water Quality Monitoring (2021)
Journal Article
Manjakkal, L., Mitra, S., Petillot, Y. R., Shutler, J., Scott, E. M., Willander, M., & Dahiya, R. (2021). Connected Sensors, Innovative Sensor Deployment, and Intelligent Data Analysis for Online Water Quality Monitoring. IEEE Internet of Things, 8(18), 13805-13824. https://doi.org/10.1109/jiot.2021.3081772

The sensor technology for water quality monitoring (WQM) has improved during recent years. The cost-effective sensorised tools that can autonomously measure the essential physical-chemical-biological (PCB) variables are now readily available and are... Read More about Connected Sensors, Innovative Sensor Deployment, and Intelligent Data Analysis for Online Water Quality Monitoring.

Metal Coated Fabric Based Asymmetric Supercapacitor for Wearable Applications (2021)
Journal Article
Pullanchiyodan, A., Manjakkal, L., & Dahiya, R. (2021). Metal Coated Fabric Based Asymmetric Supercapacitor for Wearable Applications. IEEE Sensors Journal, 21(23), 26208-26214. https://doi.org/10.1109/jsen.2021.3058894

This paper presents a fabric based asymmetric supercapacitor (ASC) with metal coated cloths as the electrode and the current collector. Graphite paste printed on silver coated textile (Berlin) is used as the negative electrode and nickel/copper/silve... Read More about Metal Coated Fabric Based Asymmetric Supercapacitor for Wearable Applications.

Natural Jute Fibre‐Based Supercapacitors and Sensors for Eco‐Friendly Energy Autonomous Systems (2021)
Journal Article
Manjakkal, L., Franco, F. F., Pullanchiyodan, A., González‐Jiménez, M., & Dahiya, R. (2021). Natural Jute Fibre‐Based Supercapacitors and Sensors for Eco‐Friendly Energy Autonomous Systems. Advanced Sustainable Systems, 5(3), Article 2000286. https://doi.org/10.1002/adsu.202000286

Environmentally friendly energy devices and systems are of increasing interest for the circular economy and sustainable information and communications technology. To this end, an energy-autonomous system comprised of natural jute fiber-based supercap... Read More about Natural Jute Fibre‐Based Supercapacitors and Sensors for Eco‐Friendly Energy Autonomous Systems.

Glycine-based Flexible Biocompatible Piezoelectric Pressure Sensor for Healthcare Applications (2020)
Conference Proceeding
Hosseini, E. S., Manjakkal, L., Shakthivel, D., & Dahiya, R. (2020). Glycine-based Flexible Biocompatible Piezoelectric Pressure Sensor for Healthcare Applications. In 2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS). https://doi.org/10.1109/fleps49123.2020.9239575

This work presents biocompatible flexible piezoelectric composite fabricated by self-assembly of amino acid glycine molecules inside natural chitosan polymer. Piezoelectric composite film consists of glycine spherulite structure embedded in chitosan... Read More about Glycine-based Flexible Biocompatible Piezoelectric Pressure Sensor for Healthcare Applications.

Flexible Potentiostat Readout Circuit Patch for Electrochemical and Biosensor Applications (2020)
Conference Proceeding
Escobedo, P., Manjakkal, L., Ntagios, M., & Dahiya, R. (2020). Flexible Potentiostat Readout Circuit Patch for Electrochemical and Biosensor Applications. In 2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS). https://doi.org/10.1109/fleps49123.2020.9239515

This paper presents a miniaturized potentiostat readout circuit patch developed for electrochemical or biosensors. The presented patch has been fabricated on a flexible polyimide substrate using off-the-shelf electronics. In contrast to the tradition... Read More about Flexible Potentiostat Readout Circuit Patch for Electrochemical and Biosensor Applications.

Metal Coated Fabric Based Supercapacitors (2020)
Conference Proceeding
Pullanchiyodan, A., Manjakkal, L., & Dahiya, R. (2020). Metal Coated Fabric Based Supercapacitors. In 2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS). https://doi.org/10.1109/fleps49123.2020.9239537

This work reports the fabric-based supercapacitors (FSCs) using silver coated textile as the current collector. The electrochemical properties of the device in PVA-KCl gel electrolyte was studied. The performance of the device was further improved by... Read More about Metal Coated Fabric Based Supercapacitors.

Flexible Supercapacitor with Sweat Equivalent Electrolyte for Safe and Ecofriendly Energy Storage (2020)
Conference Proceeding
Manjakkal, L., Pullanchiyodan, A., Hosseini, E. S., & Dahiya, R. (2020). Flexible Supercapacitor with Sweat Equivalent Electrolyte for Safe and Ecofriendly Energy Storage. In 2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS). https://doi.org/10.1109/fleps49123.2020.9239523

Textile based wearable, biocompatible and low-cost energy storage devices are highly in demand to overcome the issue of powering wearable sensors and electronic devices. In this work, we designed an environmentally friendly textile supercapacitor (SC... Read More about Flexible Supercapacitor with Sweat Equivalent Electrolyte for Safe and Ecofriendly Energy Storage.

Screen-Printed Flexible Carbon versus Silver Electrodes for Electrochemical Sensors (2020)
Conference Proceeding
Franco, F. F., Manjakkal, L., & Dahiya, R. (2020). Screen-Printed Flexible Carbon versus Silver Electrodes for Electrochemical Sensors. In 2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS). https://doi.org/10.1109/fleps49123.2020.9239549

This paper presents the carbon-based screen-printed electrodes (C-SPEs) and compares them with conventional SPEs made of Ag. The electrochemical performance of the two types of electrodes is compared in the presence of common salts found in water bod... Read More about Screen-Printed Flexible Carbon versus Silver Electrodes for Electrochemical Sensors.

Ultrathin Ion-Sensitive Field-Effect Transistor Chips with Bending-Induced Performance Enhancement (2020)
Journal Article
Vilouras, A., Christou, A., Manjakkal, L., & Dahiya, R. (2020). Ultrathin Ion-Sensitive Field-Effect Transistor Chips with Bending-Induced Performance Enhancement. ACS Applied Electronic Materials, 2(8), 2601-2610. https://doi.org/10.1021/acsaelm.0c00489

Flexible multifunctional sensors on skin or wearables are considered highly suitable for next-generation noninvasive health care devices. In this regard, the field-effect transistor (FET)-based chemical sensors such as ion-sensitive FETs (ISFETs) are... Read More about Ultrathin Ion-Sensitive Field-Effect Transistor Chips with Bending-Induced Performance Enhancement.

A Wearable Supercapacitor Based on Conductive PEDOT:PSS‐Coated Cloth and a Sweat Electrolyte (2020)
Journal Article
Manjakkal, L., Pullanchiyodan, A., Yogeswaran, N., Hosseini, E. S., & Dahiya, R. (2020). A Wearable Supercapacitor Based on Conductive PEDOT:PSS‐Coated Cloth and a Sweat Electrolyte. Advanced materials, 32(24), Article 1907254. https://doi.org/10.1002/adma.201907254

A sweat-based flexible supercapacitor (SC) for self-powered smart textiles and wearable systems is presented. The developed SC uses sweat as the electrolyte and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as the active electro... Read More about A Wearable Supercapacitor Based on Conductive PEDOT:PSS‐Coated Cloth and a Sweat Electrolyte.

Metal Coated Conductive Fabrics with Graphite Electrodes and Biocompatible Gel Electrolyte for Wearable Supercapacitors (2020)
Journal Article
Pullanchiyodan, A., Manjakkal, L., Dervin, S., Shakthivel, D., & Dahiya, R. (2020). Metal Coated Conductive Fabrics with Graphite Electrodes and Biocompatible Gel Electrolyte for Wearable Supercapacitors. Advanced Materials Technologies, 5(5), Article 1901107. https://doi.org/10.1002/admt.201901107

Fabric-based supercapacitors have received considerable interest as energy storage devices for wearable systems. This work demonstrates the use of metal coated fabrics as the active material and current collector with nontoxic polyvinyl alcohol (PVA)... Read More about Metal Coated Conductive Fabrics with Graphite Electrodes and Biocompatible Gel Electrolyte for Wearable Supercapacitors.

Flexible potentiometric pH sensors for wearable systems (2020)
Journal Article
Manjakkal, L., Dervin, S., & Dahiya, R. (2020). Flexible potentiometric pH sensors for wearable systems. RSC Advances, 10(15), 8594-8617. https://doi.org/10.1039/d0ra00016g

There is a growing demand for developing wearable sensors that can non-invasively detect the signs of chronic diseases early on to possibly enable self-health management. Among these the flexible and stretchable electrochemical pH sensors are particu... Read More about Flexible potentiometric pH sensors for wearable systems.

Flexible Iridium Oxide Based pH Sensor Integrated With Inductively Coupled Wireless Transmission System for Wearable Applications (2020)
Journal Article
Marsh, P., Manjakkal, L., Yang, X., Huerta, M., Le, T., Thiel, L., …Dahiya, R. (2020). Flexible Iridium Oxide Based pH Sensor Integrated With Inductively Coupled Wireless Transmission System for Wearable Applications. IEEE Sensors Journal, 20(10), 5130-5138. https://doi.org/10.1109/jsen.2020.2970926

This work presents a pH sensor platform combining the high performance of iridium oxide (IrOx) fabricated by cyclic voltammetry with inductively-coupled wireless (ICW) transmission. Data included presents flexible potentiometric pH sensors having IrO... Read More about Flexible Iridium Oxide Based pH Sensor Integrated With Inductively Coupled Wireless Transmission System for Wearable Applications.

Metal oxides based electrochemical pH sensors: Current progress and future perspectives (2019)
Journal Article
Manjakkal, L., Szwagierczak, D., & Dahiya, R. (2020). Metal oxides based electrochemical pH sensors: Current progress and future perspectives. Progress in Materials Science, 109, Article 100635. https://doi.org/10.1016/j.pmatsci.2019.100635

Electrochemical pH sensors are on high demand in numerous applications such as food processing, health monitoring, agriculture and nuclear sectors, and water quality monitoring etc., owing to their fast response (

Large-Area Soft e-Skin: The Challenges Beyond Sensor Designs (2019)
Journal Article
Dahiya, R., Yogeswaran, N., Liu, F., Manjakkal, L., Burdet, E., Hayward, V., & Jorntell, H. (2019). Large-Area Soft e-Skin: The Challenges Beyond Sensor Designs. Proceedings of the IEEE, 107(10), 2016-2033. https://doi.org/10.1109/jproc.2019.2941366

Sensory feedback from touch is critical for many tasks carried out by robots and humans, such as grasping objects or identifying materials. Electronic skin (e-skin) is a crucial technology for these purposes. Artificial tactile skin that can play the... Read More about Large-Area Soft e-Skin: The Challenges Beyond Sensor Designs.

Triboelectric Nanogenerator With Enhanced Performance via an Optimized Low Permittivity Substrate (2019)
Journal Article
Min, G., Manjakkal, L., Mulvihill, D. M., & Dahiya, R. S. (2020). Triboelectric Nanogenerator With Enhanced Performance via an Optimized Low Permittivity Substrate. IEEE Sensors Journal, 20(13), 6856-6862. https://doi.org/10.1109/jsen.2019.2938605

With electrical power generated from mechanical contact, triboelectric nanogenerators (TENGs) offer a promising route to realizing self-powered sensors. For effective usage, it is important to improve their limited power range (0.1–100 mW/cm 2 ) and... Read More about Triboelectric Nanogenerator With Enhanced Performance via an Optimized Low Permittivity Substrate.

Cloth Based Biocompatiable Temperature Sensor (2019)
Conference Proceeding
Manjakkal, L., Soni, M., Yogeswaran, N., & Dahiya, R. (2019). Cloth Based Biocompatiable Temperature Sensor. In 2019 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS). https://doi.org/10.1109/fleps.2019.8792319

Circular economy focussing on the reuse and recycling of materials is gaining significant interest these days as the concern for environment sustainability is increasing [1] - [3] . In this regard, printed electronics or green electronics is being pr... Read More about Cloth Based Biocompatiable Temperature Sensor.

Printed Temperature Sensor based on Graphene Oxide/PEDOT:PSS (2019)
Conference Proceeding
Soni, M., Bhattacharjee, M., Manjakkal, L., & Dahiya, R. (2019). Printed Temperature Sensor based on Graphene Oxide/PEDOT:PSS. In 2019 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS). https://doi.org/10.1109/fleps.2019.8792268

Temperature is an important physical parameter which need to be monitored for various applications ranging from health monitoring to robotics [1] , [2]. In humans, accurate measurement of the variations in the skin temperature is utilized for investi... Read More about Printed Temperature Sensor based on Graphene Oxide/PEDOT:PSS.

Energy autonomous eSkin (2019)
Conference Proceeding
Manjakkal, L., Nunez, C. G., & Dahiya, R. (2019). Energy autonomous eSkin. In Proceedings SPIE 10982: Micro- and Nanotechnology Sensors, Systems, and Applications XI. https://doi.org/10.1117/12.2520757

The energy autonomy is a critical feature that would enable better portability and longer operation times for wearable systems. In the next generation of prosthesis and robotics, the operation of multiple components (from few sensors to millions of e... Read More about Energy autonomous eSkin.

Graphene–Graphite Polyurethane Composite Based High‐Energy Density Flexible Supercapacitors (2019)
Journal Article
Manjakkal, L., Navaraj, W. T., Núñez, C. G., & Dahiya, R. (2019). Graphene–Graphite Polyurethane Composite Based High‐Energy Density Flexible Supercapacitors. Advanced Science, 6(7), Article 1802251. https://doi.org/10.1002/advs.201802251

Energy autonomy is critical for wearable and portable systems and to this end storage devices with high-energy density are needed. This work presents high-energy density flexible supercapacitors (SCs), showing three times the energy density than simi... Read More about Graphene–Graphite Polyurethane Composite Based High‐Energy Density Flexible Supercapacitors.

Textile-Based Potentiometric Electrochemical pH Sensor for Wearable Applications (2019)
Journal Article
Manjakkal, L., Dang, W., Yogeswaran, N., & Dahiya, R. (2019). Textile-Based Potentiometric Electrochemical pH Sensor for Wearable Applications. Biosensors, 9(1), Article 14. https://doi.org/10.3390/bios9010014

In this work, we present a potentiometric pH sensor on textile substrate for wearable applications. The sensitive (thick film graphite composite) and reference electrodes (Ag/AgCl) are printed on cellulose-polyester blend cloth. An excellent adhesion... Read More about Textile-Based Potentiometric Electrochemical pH Sensor for Wearable Applications.

Energy autonomous electronic skin (2019)
Journal Article
García Núñez, C., Manjakkal, L., & Dahiya, R. (2019). Energy autonomous electronic skin. npj Flexible Electronics, 3(1), Article 1. https://doi.org/10.1038/s41528-018-0045-x

Energy autonomy is key to the next generation portable and wearable systems for several applications. Among these, the electronic-skin or e-skin is currently a matter of intensive investigations due to its wider applicability in areas, ranging from r... Read More about Energy autonomous electronic skin.

Cost-effective sensors and sensor nodes for monitoring environmental parameters (2018)
Journal Article
Vasiljevic, D., Zlebic, C., Stojanovic, G., Simic, M., Manjakkal, L., & Stamenkovic, Z. (2018). Cost-effective sensors and sensor nodes for monitoring environmental parameters. Facta Universitatis, Series: Mechanical Engineering, 31(1), 11-23. https://doi.org/10.2298/fuee1801011v

This paper reviews the design and characterization of humidity and pH sensors manufactured in the printed circuit board (PCB), ink-jet, and screen printing technologies. The first one (PCB technology) provides robust sensors with PET film which can b... Read More about Cost-effective sensors and sensor nodes for monitoring environmental parameters.

Flexible ZnO Nanowires-Graphene Stack by Hot Lamination Method (2018)
Conference Proceeding
Shakthivel, D., Yogeswaran, N., Manjakkal, L., & Dahiva, R. (2018). Flexible ZnO Nanowires-Graphene Stack by Hot Lamination Method. In 2018 IEEE Sensors. https://doi.org/10.1109/icsens.2018.8589818

Inorganic nanostructures on flexible substrates form key components for high performance flexible electronics. 1D (Nanowires) and 2D (graphene) nanostructures are inherently flexible, in addition to having attractive electronic properties. The utilit... Read More about Flexible ZnO Nanowires-Graphene Stack by Hot Lamination Method.

Energy Autonomous Sensors for Water Quality Monitoring (2018)
Conference Proceeding
Manjakkal, L., Nikbakhtnasrabadi, F., & Dahiya, R. (2018). Energy Autonomous Sensors for Water Quality Monitoring. . https://doi.org/10.1109/icsens.2018.8589564

This work is aimed to investigate conductivity and temperature of a solution by using energy autonomous thick film sensors. A RuO 2 based thick film electrode is fabricated for conductivity sensor and an interdigitated electrode with graphite sensiti... Read More about Energy Autonomous Sensors for Water Quality Monitoring.

Enhanced Triboelectric Nanogenerator Performance via an Optimised Low Permittivity, Low Thickness Substrate (2018)
Conference Proceeding
Min, G., Manjakkal, L., Mulvihill, D. M., & Dahiya, R. S. (2018). Enhanced Triboelectric Nanogenerator Performance via an Optimised Low Permittivity, Low Thickness Substrate. . https://doi.org/10.1109/icsens.2018.8589631

With electrical power generated from mechanical contact, the triboelectric nanogenerators (TEN Gs) have attracted attention recently as a promising route to realising self-powered sensors (e.g. tactile sensors, biomedical sensors etc.). Due to their... Read More about Enhanced Triboelectric Nanogenerator Performance via an Optimised Low Permittivity, Low Thickness Substrate.

Bio-Organic Glycine Based Flexible Piezoelectric Stress Sensor for Wound Monitoring (2018)
Conference Proceeding
Hosseini, E. S., Manjakkal, L., & Dahiya, R. (2018). Bio-Organic Glycine Based Flexible Piezoelectric Stress Sensor for Wound Monitoring. . https://doi.org/10.1109/icsens.2018.8589588

The application of controlled mechanical stress on a wound site can accelerate the wound healing by improving the cellular proliferation during tissue regeneration. To facilitate this there is need to monitor the applied stress around the wound site... Read More about Bio-Organic Glycine Based Flexible Piezoelectric Stress Sensor for Wound Monitoring.

Contact-Printing of Zinc Oxide Nanowires for Chemical Sensing Applications (2018)
Conference Proceeding
Nunez, C. G., Manjakkal, L., Liu, F., & Dahiya, R. (2018). Contact-Printing of Zinc Oxide Nanowires for Chemical Sensing Applications. . https://doi.org/10.1109/icsens.2018.8589516

This paper presents a new method for printing zinc oxide (ZnO) nanowires (NWs) and their analysis for chemical sensing applications. High-crystal quality ZnO NWs are synthesized by chemical vapour transport (CVT) technique and directly transferred an... Read More about Contact-Printing of Zinc Oxide Nanowires for Chemical Sensing Applications.

Flexible Printed Reference Electrodes for Electrochemical Applications (2018)
Journal Article
Manjakkal, L., Shakthivel, D., & Dahiya, R. (2018). Flexible Printed Reference Electrodes for Electrochemical Applications. Advanced Materials Technologies, 3(12), Article 1800252. https://doi.org/10.1002/admt.201800252

This work presents screen-printed thick film reference electrodes (REs) on a polyethylene terephthalate substrate. The ion-conducting channel of presented screen-printed thick film Ag|AgCl|KCl electrodes are made from a composite of glass–KCl powder.... Read More about Flexible Printed Reference Electrodes for Electrochemical Applications.

Flexible self-charging supercapacitor based on graphene-Ag-3D graphene foam electrodes (2018)
Journal Article
Manjakkal, L., Núñez, C. G., Dang, W., & Dahiya, R. (2018). Flexible self-charging supercapacitor based on graphene-Ag-3D graphene foam electrodes. Nano Energy, 51, 604-612. https://doi.org/10.1016/j.nanoen.2018.06.072

A flexible three-dimensional porous graphene foam-based supercapacitor (GFSC) is presented here for energy storage applications. With a novel layered structure of highly conductive electrodes (graphene-Ag conductive epoxy–graphene foam), forming an e... Read More about Flexible self-charging supercapacitor based on graphene-Ag-3D graphene foam electrodes.

Screen Printed Thick Film Reference Electrodes for Electrochemical Sensing (2018)
Journal Article
Manjakkal, L., Vilouras, A., & Dahiya, R. (2018). Screen Printed Thick Film Reference Electrodes for Electrochemical Sensing. IEEE Sensors Journal, 18(19), 7779-7785. https://doi.org/10.1109/jsen.2018.2840349

This paper presents printed thick film Ag|AgCl|KCl reference electrodes (RE) for electrochemical sensors. The screenprinted REs with 10-μm thick glass-KCl salt matrix layer exhibit a stable potential of 5 mV. Cyclic voltammetric analysis shows that t... Read More about Screen Printed Thick Film Reference Electrodes for Electrochemical Sensing.

Printed flexible electrochemical pH sensors based on CuO nanorods (2018)
Journal Article
Manjakkal, L., Sakthivel, B., Gopalakrishnan, N., & Dahiya, R. (2018). Printed flexible electrochemical pH sensors based on CuO nanorods. Sensors and Actuators B: Chemical, 263, 50-58. https://doi.org/10.1016/j.snb.2018.02.092

Nanostructured metal oxides have attracted significant interest in a range of areas in electrochemical applications such as sensors, supercapacitors, and battery electrodes etc. Printing of these materials on flexible substrates will open new applica... Read More about Printed flexible electrochemical pH sensors based on CuO nanorods.

Stretchable wireless system for sweat pH monitoring (2018)
Journal Article
Dang, W., Manjakkal, L., Navaraj, W. T., Lorenzelli, L., Vinciguerra, V., & Dahiya, R. (2018). Stretchable wireless system for sweat pH monitoring. Biosensors and Bioelectronics, 107, 192-202. https://doi.org/10.1016/j.bios.2018.02.025

Sensor-laden wearable systems that are capable of providing continuous measurement of key physiological parameters coupled with data storage, drug delivery and feedback therapy have attracted huge interest. Here we report a stretchable wireless syste... Read More about Stretchable wireless system for sweat pH monitoring.

Electrochemical sensors with screen printed Ag|AgCl|KCl reference electrodes (2017)
Conference Proceeding
Manjakkal, L., Pascual, C. L., & Dahiya, R. (2017). Electrochemical sensors with screen printed Ag|AgCl|KCl reference electrodes. In 2017 IEEE SENSORS. https://doi.org/10.1109/icsens.2017.8234044

This paper presents the printed thick film Ag|AgCl|KCl reference electrodes for electrochemical or biosensors application and theirelectrochemical and analytical performance. The reference electrode exhibits a stable potential against standard glass... Read More about Electrochemical sensors with screen printed Ag|AgCl|KCl reference electrodes.

Stretchable pH sensing patch in a hybrid package (2017)
Conference Proceeding
Dang, W., Manjakkal, L., Lorenzelli, L., Vinciguerra, V., & Dahiya, R. (2017). Stretchable pH sensing patch in a hybrid package. In 2017 IEEE SENSORS. https://doi.org/10.1109/icsens.2017.8234297

This work presents a novel stretchable pH sensing patch to detect the pH in body fluid which is one of the most important parameters in human health monitoring. The sensing patch is a hybrid package comprising of polyimide/gold-based stretchable inte... Read More about Stretchable pH sensing patch in a hybrid package.

High Performance CuO Nanorectangles-Based Room Temperature Flexible NH3 Sensor (2017)
Journal Article
Sakthivel, B., Manjakkal, L., & Nammalvar, G. (2017). High Performance CuO Nanorectangles-Based Room Temperature Flexible NH3 Sensor. IEEE Sensors Journal, 17(20), 6529-6536. https://doi.org/10.1109/jsen.2017.2749334

Here, we report the fabrication of a flexible room temperature ammonia gas sensor using surfactant-free hydrothermally synthesized copper oxide (CuO) nanorectangles. The structural analysis revealed that the CuO nanorectangles possessed monoclinic st... Read More about High Performance CuO Nanorectangles-Based Room Temperature Flexible NH3 Sensor.

Multi-sensor system for remote environmental (air and water) quality monitoring (2017)
Conference Proceeding
Simic, M., Stojanovic, G. M., Manjakkal, L., & Zaraska, K. (2017). Multi-sensor system for remote environmental (air and water) quality monitoring. In 2016 24th Telecommunications Forum (TELFOR). https://doi.org/10.1109/telfor.2016.7818711

In this paper realization of the low-power, portable, low-cost multi-sensor system for air and water quality monitoring is described. Developed system is battery-powered with solar panel-based charger unit, and it is intended for use in remote enviro... Read More about Multi-sensor system for remote environmental (air and water) quality monitoring.

Electrical and optical properties of aluminium doped zinc oxide transparent conducting oxide films prepared by dip coating technique (2017)
Journal Article
Manjakkal, L., Packia Selvam, I., Potty, S., & Shinde, R. (2017). Electrical and optical properties of aluminium doped zinc oxide transparent conducting oxide films prepared by dip coating technique. Microelectronics International, 34(1), 1-8. https://doi.org/10.1108/mi-06-2015-0058

Purpose Aluminium-doped zinc oxide thin films exhibit interesting optoelectronic properties, which make them suitable for fabrication of photovoltaic cell, flat panel display electrode, etc. It has been shown that aluminium dopant concentration and... Read More about Electrical and optical properties of aluminium doped zinc oxide transparent conducting oxide films prepared by dip coating technique.

TiO2-Based Thick Film pH Sensor (2016)
Journal Article
Simic, M., Manjakkal, L., Zaraska, K., Stojanovic, G. M., & Dahiya, R. (2017). TiO2-Based Thick Film pH Sensor. IEEE Sensors Journal, 17(2), 248-255. https://doi.org/10.1109/jsen.2016.2628765

Miniaturized electrochemical pH sensors are increasingly in demand for applications such as online monitoring of water quality and health monitoring. The metal oxides are the best candidates for sensing electrodes of such sensors as they offer high c... Read More about TiO2-Based Thick Film pH Sensor.

X-ray photoelectron spectroscopic and electrochemical impedance spectroscopic analysis of RuO2-Ta2O5 thick film pH sensors (2016)
Journal Article
Manjakkal, L., Cvejin, K., Kulawik, J., Zaraska, K., Socha, R. P., & Szwagierczak, D. (2016). X-ray photoelectron spectroscopic and electrochemical impedance spectroscopic analysis of RuO2-Ta2O5 thick film pH sensors. Analytica Chimica Acta, 931, 47-56. https://doi.org/10.1016/j.aca.2016.05.012

The paper reports on investigation of the pH sensing mechanism of thick film RuO2-Ta2O5 sensors by using X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). Interdigitated conductimetric pH sensors were screen pri... Read More about X-ray photoelectron spectroscopic and electrochemical impedance spectroscopic analysis of RuO2-Ta2O5 thick film pH sensors.

Impedancemetric NO sensor based on YSZ/perovskite neodymium cobaltite operating at high temperatures (2016)
Journal Article
Cvejin, K., Śliwa, M., Manjakkal, L., Kulawik, J., Stojanović, G., & Szwagierczak, D. (2016). Impedancemetric NO sensor based on YSZ/perovskite neodymium cobaltite operating at high temperatures. Sensors and Actuators B: Chemical, 228, 612-624. https://doi.org/10.1016/j.snb.2016.01.071

A solid-state planar impedancemetric NO sensor was fabricated using yttria stabilized zirconia (YSZ) for a solid electrolyte substrate and a perovskite-type oxide Nd0.9Sr0.1CoO3 − δ for thick film sensing electrodes. Electrical properties of the fabr... Read More about Impedancemetric NO sensor based on YSZ/perovskite neodymium cobaltite operating at high temperatures.

Sensing mechanism of RuO2–SnO2 thick film pH sensors studied by potentiometric method and electrochemical impedance spectroscopy (2015)
Journal Article
Manjakkal, L., Cvejin, K., Kulawik, J., Zaraska, K., Szwagierczak, D., & Stojanovic, G. (2015). Sensing mechanism of RuO2–SnO2 thick film pH sensors studied by potentiometric method and electrochemical impedance spectroscopy. Journal of Electroanalytical Chemistry, 759, 82-90. https://doi.org/10.1016/j.jelechem.2015.10.036

In this work, we developed thick film pH sensors based on the nanostructured RuO2–SnO2 system and analyzed their sensing mechanism using the potentiometric and electrochemical impedance spectroscopic (EIS) methods. The crystal structure and morpholog... Read More about Sensing mechanism of RuO2–SnO2 thick film pH sensors studied by potentiometric method and electrochemical impedance spectroscopy.

Potentiometric RuO2–Ta2O5 pH sensors fabricated using thick film and LTCC technologies (2015)
Journal Article
Manjakkal, L., Zaraska, K., Cvejin, K., Kulawik, J., & Szwagierczak, D. (2016). Potentiometric RuO2–Ta2O5 pH sensors fabricated using thick film and LTCC technologies. Talanta, 147, 233-240. https://doi.org/10.1016/j.talanta.2015.09.069

The paper reports on the preparation, properties and application of potentiometric pH sensors with thick film RuO2–Ta2O5 sensing electrode and Ag/AgCl/KCl reference electrode screen printed on an alumina substrate. Furthermore, it presents fabricatio... Read More about Potentiometric RuO2–Ta2O5 pH sensors fabricated using thick film and LTCC technologies.

Development and characterization of miniaturized LTCC pH sensors with RuO 2 based sensing electrodes (2015)
Journal Article
Manjakkal, L., Synkiewicz, B., Zaraska, K., Cvejin, K., Kulawik, J., & Szwagierczak, D. (2016). Development and characterization of miniaturized LTCC pH sensors with RuO 2 based sensing electrodes. Sensors and Actuators B: Chemical, 223, 641-649. https://doi.org/10.1016/j.snb.2015.09.135

This work describes the development of a low cost miniaturized solid state pH sensor using LTCC (low temperature cofired ceramic) technology. Thick film sensing electrodes screen printed on LTCC substrates were made of RuO2 and RuO2-Ta2O5-glass based... Read More about Development and characterization of miniaturized LTCC pH sensors with RuO 2 based sensing electrodes.

Electrochemical Impedance Spectroscopic Analysis of RuO2 Based Thick Film pH Sensors (2015)
Journal Article
Manjakkal, L., Djurdjic, E., Cvejin, K., Kulawik, J., Zaraska, K., & Szwagierczak, D. (2015). Electrochemical Impedance Spectroscopic Analysis of RuO2 Based Thick Film pH Sensors. Electrochimica Acta, 168, 246-255. https://doi.org/10.1016/j.electacta.2015.04.048

The conductimetric interdigitated thick film pH sensors based on RuO2 were fabricated and their electrochemical reactions with solutions of different pH values were studied by electrochemical impedance spectroscopy (EIS) technique. The microstructura... Read More about Electrochemical Impedance Spectroscopic Analysis of RuO2 Based Thick Film pH Sensors.

Planar Impedancemetric NO Sensor with Thick Film Perovskite Electrodes Based on Samarium Cobaltite (2015)
Journal Article
Cvejin, K., Manjakkal, L., Kulawik, J., Zaraska, K., & Szwagierczak, D. (2015). Planar Impedancemetric NO Sensor with Thick Film Perovskite Electrodes Based on Samarium Cobaltite. Electroanalysis, 27(3), 760-769. https://doi.org/10.1002/elan.201400602

Impedancemetric NO sensors were fabricated, comprising yttria stabilized zirconia disc with thick film Sm0.9Sr0.1CoO3−δ electrodes of different design. Impedance measurements were performed at 600–800 °C for frequencies 0.01 Hz–100 kHz, in gas mixtur... Read More about Planar Impedancemetric NO Sensor with Thick Film Perovskite Electrodes Based on Samarium Cobaltite.

Microstructural, Impedance Spectroscopic and Potentiometric Analysis of Ta₂O₅ Electrochemical Thick Film pH Sensors (2015)
Journal Article
Manjakkal, L., Cvejin, K., Bajac, B., Kulawik, J., Zaraska, K., & Szwagierczak, D. (2015). Microstructural, Impedance Spectroscopic and Potentiometric Analysis of Ta₂O₅ Electrochemical Thick Film pH Sensors. Electroanalysis, 27(3), 770-781. https://doi.org/10.1002/elan.201400571

Two types of pH sensors based on Ta2O5 thick films, interdigitated conductimetric and potentiometric ones, were screen printed on an alumina substrate. Their properties were characterized by X-ray diffraction, Raman spectroscopy, scanning electron mi... Read More about Microstructural, Impedance Spectroscopic and Potentiometric Analysis of Ta₂O₅ Electrochemical Thick Film pH Sensors.

Planar impedancemetric NO sensor with thick film mixed dy-based oxides sensing electrodes (2014)
Conference Proceeding
Cvejin, K., Manjakkal, L., Kulawik, J., Zaraska, K., & Szwagierczak, D. (2014). Planar impedancemetric NO sensor with thick film mixed dy-based oxides sensing electrodes. In 2014 International Conference and Exposition on Electrical and Power Engineering (EPE). https://doi.org/10.1109/icepe.2014.6970025

The pastes destined for sensing electrodes were prepared by mixing Dy-based oxides powders with organic vehicle. The sensing electrodes of interdigitated structure were screen printed onto yttria stabilized zirconia substrates, fabricated from commer... Read More about Planar impedancemetric NO sensor with thick film mixed dy-based oxides sensing electrodes.

Design of data acquisition system for environmental sensors manufactured in LTCC technology (2014)
Conference Proceeding
Mariana, S., Anatolie, I., Manjakkal, L., & Villalba, J. F. B. (2014). Design of data acquisition system for environmental sensors manufactured in LTCC technology. In 2014 International Conference and Exposition on Electrical and Power Engineering (EPE). https://doi.org/10.1109/icepe.2014.6970030

In this paper a new architecture of a continuous sensors monitoring system based on charge amplifier and ARM microcontroller is proposed. In particular the electrical circuit, the schematic of a double system monitoring of sensors and Labview user in... Read More about Design of data acquisition system for environmental sensors manufactured in LTCC technology.

Electrochemical interdigitated conductimetric ph sensor based on RuO2 thick film sensitive layer (2014)
Conference Proceeding
Manjakkal, L., Cvejin, K., Kulawik, J., Zaraska, K., & Szwagierczak, D. (2014). Electrochemical interdigitated conductimetric ph sensor based on RuO2 thick film sensitive layer. In 2014 International Conference and Exposition on Electrical and Power Engineering (EPE). https://doi.org/10.1109/icepe.2014.6970020

Metal oxide based electrochemical pH sensors are an alternative to the glass pH sensor, exhibiting many potential advantages in industrial and laboratory applications. In particular, thick film based pH sensors are promising devices for a next genera... Read More about Electrochemical interdigitated conductimetric ph sensor based on RuO2 thick film sensitive layer.

Characterization and applicability of Sm0.9Sr0.1CoO3-δ in oxygen sensors (2014)
Journal Article
Cvejin, K., Manjakkal, L., Kulawik, J., Zaraska, K., & Szwagierczak, D. (2014). Characterization and applicability of Sm0.9Sr0.1CoO3-δ in oxygen sensors. Microelectronics International, 31(3), 154-157. https://doi.org/10.1108/mi-11-2013-0075

Purpose This paper aims to investigate different properties of synthesized perovskite Sm0.9Sr0.1CoO3-δ and its potential for application in potentiometric oxygen sensors. Design/methodology/approach The powder was obtained through solid-state re... Read More about Characterization and applicability of Sm0.9Sr0.1CoO3-δ in oxygen sensors.

Fabrication of thick film sensitive RuO2-TiO2 and Ag/AgCl/KCl reference electrodes and their application for pH measurements (2014)
Journal Article
Manjakkal, L., Cvejin, K., Kulawik, J., Zaraska, K., Szwagierczak, D., & Socha, R. P. (2014). Fabrication of thick film sensitive RuO2-TiO2 and Ag/AgCl/KCl reference electrodes and their application for pH measurements. Sensors and Actuators B: Chemical, 204, 57-67. https://doi.org/10.1016/j.snb.2014.07.067

In this work thick film potentiometric and conductimetric sensors based on mixed metal oxides RuO2 and TiO2 were fabricated and investigated. For potentiometric sensors, pH sensitive RuO2-TiO2 electrode and a reference Ag/AgCl/KCl electrode were deve... Read More about Fabrication of thick film sensitive RuO2-TiO2 and Ag/AgCl/KCl reference electrodes and their application for pH measurements.

The Effect of Sheet Resistivity and Storage Conditions on Sensitivity of RuO2 Based pH Sensors (2014)
Journal Article
Manjakkal, L., Cvejin, K., Kulawik, J., Zaraska, K., & Szwagierczak, D. (2014). The Effect of Sheet Resistivity and Storage Conditions on Sensitivity of RuO2 Based pH Sensors. Key Engineering Materials, 605, 457-460. https://doi.org/10.4028/www.scientific.net/kem.605.457

The increasing fresh water deficiency due to environmental pollution demands accurate, reliable and highly sensitive sensors for online monitoring of water pollution. Solid state sensors are helpful for fabricating and implementing low cost wireless... Read More about The Effect of Sheet Resistivity and Storage Conditions on Sensitivity of RuO2 Based pH Sensors.

Synthesis of Perovskite Sr Doped Lanthanide Cobaltites and Ferrites and Application for Oxygen Sensors: A Comparative Study (2014)
Journal Article
Cvejin, K., Manjakkal, L., Kulawik, J., Zaraska, K., & Szwagierczak, D. (2014). Synthesis of Perovskite Sr Doped Lanthanide Cobaltites and Ferrites and Application for Oxygen Sensors: A Comparative Study. Key Engineering Materials, 605, 483-486. https://doi.org/10.4028/www.scientific.net/kem.605.483

Perovskites with formula A1-xSrxBO3-δ (A = La, Nd, Sm; B = Fe or Co) have been synthesized by solid state reaction method and have been studied as materials for oxygen sensor application. The obtained powders were used for making thick film pastes th... Read More about Synthesis of Perovskite Sr Doped Lanthanide Cobaltites and Ferrites and Application for Oxygen Sensors: A Comparative Study.

A Low-Cost pH Sensor Based on RuO2 Resistor Material (2013)
Journal Article
Manjakkal, L., Cvejin, K., Kulawik, J., Zaraska, K., & Szwagierczak, D. (2013). A Low-Cost pH Sensor Based on RuO2 Resistor Material. Nano Hybrids, 5, 1-15. https://doi.org/10.4028/www.scientific.net/nh.5.1

Fresh water deficiency caused by climate change calls for employing novel measures to ensure safety of drinking water supply. Wireless sensor networks can be used for monitoring hydrological conditions across wide area, allowing flow forecasting and... Read More about A Low-Cost pH Sensor Based on RuO2 Resistor Material.