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Dr Libu Manjakkal's Outputs (96)

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)
Presentation / Conference Contribution
Cvejin, K., Manjakkal, L., Kulawik, J., Zaraska, K., & Szwagierczak, D. (2014, October). Planar impedancemetric NO sensor with thick film mixed dy-based oxides sensing electrodes. Presented at 2014 International Conference and Exposition on Electrical and Power Engineering (EPE), Iasi, Romania

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)
Presentation / Conference Contribution
Mariana, S., Anatolie, I., Manjakkal, L., & Villalba, J. F. B. (2014, October). Design of data acquisition system for environmental sensors manufactured in LTCC technology. Presented at 2014 International Conference and Exposition on Electrical and Power Engineering (EPE), Iasi, Romania

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)
Presentation / Conference Contribution
Manjakkal, L., Cvejin, K., Kulawik, J., Zaraska, K., & Szwagierczak, D. (2014, October). Electrochemical interdigitated conductimetric ph sensor based on RuO2 thick film sensitive layer. Presented at 2014 International Conference and Exposition on Electrical and Power Engineering (EPE), Iasi, Romania

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.