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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.

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.

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.

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.

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.

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.

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.

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.

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.