Effect of IDE placement on response in metal oxide gas sensors

Prajesh, Rahul; Goyal, Vinay K.; Saini, Vikas; Bhargava, Jitendra; Sharma, Ashok K.; Agarwal, Ajay

doi:10.1088/2053-1591/aad728

Cited by 7 publications

(2 citation statements)

References 22 publications

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“…To acquire the best sensing characteristics, the IDEs structure was optimized by considering the configuration of the electrodes, electrode spacing, and sensor geometry. [38][39][40] A commercial Ag NP dispersion (30-35 wt.% in triethylene glycol monomethyl ether, Sigma-Aldrich) was used to print the IDEs with 50 µm finger width and 42 µm gap. The ink cartridge containing the Ag NPs dispersion and printing stage were kept at 40 and 60 °C, respectively.…”

Section: Methodsmentioning

confidence: 99%

Inkjet‐Printed rGO/binary Metal Oxide Sensor for Predictive Gas Sensing in a Mixed Environment

Ogbeide

Bae

et al. 2022

Adv Funct Materials

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Selectivity for specific analytes and high‐temperature operation are key challenges for chemiresistive‐type gas sensors. Complementary hybrid materials, such as reduced graphene oxide (rGO) decorated with metal oxides enables realization of room‐temperature sensors with enhanced sensitivity. However, sensor training to identify target gases and accurate concentration measurement from gas mixtures still remain very challenging. This work proposes hybridization of rGO with CuCoOx binary metal oxide as a sensing material. Highly stable, room‐temperature NO2 sensors with a 50 ppb of detection limit is demonstrated using inkjet printing. A framework is then developed for machine‐intelligent recognition with good visibility to identify specific gases and predict concentration under an interfering atmosphere from a single sensor. Using ten unique parameters extracted from the sensor response, the machine learning‐based classifier provides a decision boundary with 98.1% accuracy, and is able to correctly predict previously unseen NO2 and humidity concentrations in an interfering environment. This approach enables implementation of an intelligent platform for printable, room‐temperature gas sensors in a mixed environment irrespective of ambient humidity.

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Section: Methodsmentioning

confidence: 99%

Inkjet‐Printed rGO/binary Metal Oxide Sensor for Predictive Gas Sensing in a Mixed Environment

Ogbeide

Bae

et al. 2022

Adv Funct Materials

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“…In this case, the enhanced gas sensor response is related to the fact that the majority of reactions between the gas and the sensing film occur on the surface of the sensing layer, therefore the top electrode provides a more accurate reading of the resistance changes compared to bottom-placed electrodes. The electrode position becomes even more notable when the thickness of the sensing film is higher than 100 nm since, in this case, the overall sensor response is highly dependent on the surface changes [164]. In this manner, interdigital and top-bottom electrode designs with controlled electrode widths and electrode gaps in the nano-range are the preferable sensor configurations to obtain high-sensitivity semiconductor metal oxide sensors.…”

Section: Configuration and Geometry Of Metal Oxide Sensorsmentioning

confidence: 99%

Metal Oxide-Based Sensors for Ecological Monitoring: Progress and Perspectives

Tereshkov,

Dontsova,

Saruhan

et al. 2024

Chemosensors

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This paper aims to provide a large coverage of recent developments regarding environmental monitoring using metal oxide-based sensors. Particular attention is given to the detection of gases such as H2, COx, SOx, NOx, and CH4. The developments and analyses of the design of sensors and types of metal oxide sensing materials are emphasized. The sensing mechanisms and peculiarities of metal oxides used in chemoresistive sensors are provided. The main parameters that affect the sensitivity and selectivity of metal oxide sensors are indicated and their significance to the sensor signal is analyzed. Modern data processing algorithms, employed to optimize the measurement process and processing of the sensor signal, are considered. The existing sensor arrays/e-nose systems for environmental monitoring are summarized, and future prospects and challenges encountered with metal oxide-based sensor arrays are highlighted.

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Flexible IDE-Based ZnO/MWCNT Composite Sensor for Real-Time Nitric Oxide Monitoring

Bhat,

Omprakash

2024

Springer Proceedings in Materials

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Effect of IDE placement on response in metal oxide gas sensors

Cited by 7 publications

References 22 publications

Inkjet‐Printed rGO/binary Metal Oxide Sensor for Predictive Gas Sensing in a Mixed Environment

Inkjet‐Printed rGO/binary Metal Oxide Sensor for Predictive Gas Sensing in a Mixed Environment

Metal Oxide-Based Sensors for Ecological Monitoring: Progress and Perspectives

Flexible IDE-Based ZnO/MWCNT Composite Sensor for Real-Time Nitric Oxide Monitoring

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