Effect of Electrode Material on the Electrical Properties of Tin Dioxide Thick Films

Gonchar, A. G.; Rud, B. M.; Siman, N. I.; Tel’nikov, E. Ya.; Rogozinskaya, A. A.; Fiyalka, L. I.; Marchuk, A. K.

doi:10.1007/s11106-015-9700-0

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…Conventionally the catalytic activity of Au electrodes is not considered to contribute to the resistance change of a chemiresistive sensor 32 . Even though there has been no unequivocal agreement so far about how the electrode materials affect the sensing behavior of a chemiresistive sensor 33 , there has been increasing evidence showing that different electrode metals react with analytes differently 18 , 34 , 35 . Some electrode metals, such as Au and palladium, can function as catalysts and contribute to the overall conductance and the sensitivity of the sensors 34 , 36 – 39 .…”

Section: Discussionmentioning

confidence: 99%

Sensitivity enhancement of flexible gas sensors via conversion of inkjet-printed silver electrodes into porous gold counterparts

Fang

Akbari

Hester

et al. 2017

Sci Rep

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This work describes a facile, mild and general wet chemical method to change the material and the geometry of inkjet-printed interdigitated electrodes (IDEs) thus drastically enhancing the sensitivity of chemiresistive sensors. A novel layer-by-layer chemical method was developed and used to uniformly deposit semiconducting single-wall carbon nanotube (SWCNT)-based sensing elements on a Kapton® substrate. Flexible chemiresistive sensors were then fabricated by inkjet-printing fine-featured silver IDEs on top of the sensing elements. A mild and facile two-step process was employed to convert the inkjet-printed dense silver IDEs into their highly porous gold counterparts under ambient conditions without losing the IDE-substrate adhesion. A proof-of-concept gas sensor equipped with the resulting porous gold IDEs featured a sensitivity to diethyl ethylphosphonate (DEEP, a simulant of the nerve agent sarin) of at least 5 times higher than a similar sensor equipped with the original dense silver IDEs, which suggested that the electrode material and/or the Schottky contacts between the electrodes and the SWCNTs might have played an important role in the gas sensing process.

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Section: Discussionmentioning

confidence: 99%

Sensitivity enhancement of flexible gas sensors via conversion of inkjet-printed silver electrodes into porous gold counterparts

Fang

Akbari

Hester

et al. 2017

Sci Rep

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show abstract

“…Based on the experimental observations described in this work and some relevant literature, it is speculated that the "electrode effects" and the "porosity effects" were responsible for the significant sensitivity enhancement. The "electrode effects" refer to the fact that the catalytic activity of the gold electrodes contributes to the enhanced sensitivity, even though such effects are not conventionally considered to contribute to the electrical resistance change of chemiresistive sensors [33]. An unequivocal agreement has not been reached so far regarding how the sensing behavior of a chemiresistive sensor is affected by the material that its electrodes are made of [34], but more and more evidence shows that different electrode metals react with an target analyte differently [16,35,36].…”

Section: Discussionmentioning

confidence: 99%

Converting Silver Electrodes into Porous Gold Counterparts: A Strategy to Enhance Gas Sensor Sensitivity and Chemical Stability via Electrode Engineering

Fang¹

2023

Gold Nanoparticles and Their Applications in Engineering

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This chapter describes a strategy for sensitivity and chemical stability enhancement of chemiresistive gas sensors via electrode engineering. In this strategy, flexible chemiresistive gas sensors were fabricated by uniformly depositing functionalized semiconducting carbon nanotubes (CNTs) on a polyimide substrate via a novel layer-by-layer wet chemical method, followed by inkjet printing fine-featured silver interdigitated electrodes (IDEs) on the substrate. The electrode engineering was realized by converting the inkjet-printed IDEs into their highly porous and chemically stable gold counterparts via a mild and facile two-step process, with the substrate-IDE adhesion retained. As a proof-of-concept demonstration, a diethyl ethylphosphonate (DEEP, a simulant of the nerve agent sarin) sensor equipped with inkjet-printed dense silver IDEs was converted into its counterpart equipped with highly porous gold IDEs. The resulting gold-electrode gas sensor exhibited sensitivity to DEEP of at least fivefold higher than a similar sensor electrode with the dense silver IDEs. The sensitivity enhancement was probably due to the catalytic activity of the resulting gold IDEs, as well as the creation of the nano−/micro-scale pores in the gold IDEs that increased the Schottky contacts between the gold IDEs and the semiconducting CNTs.

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Conductive Composite Materials Based on Thermally Stable Fluorine-Containing Polyamide and Binary Filler

Паустовский

Rud

Shelud’ko

et al. 2017

Powder Metall Met Ceram

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Effect of Electrode Material on the Electrical Properties of Tin Dioxide Thick Films

Cited by 3 publications

References 12 publications

Sensitivity enhancement of flexible gas sensors via conversion of inkjet-printed silver electrodes into porous gold counterparts

Sensitivity enhancement of flexible gas sensors via conversion of inkjet-printed silver electrodes into porous gold counterparts

Converting Silver Electrodes into Porous Gold Counterparts: A Strategy to Enhance Gas Sensor Sensitivity and Chemical Stability via Electrode Engineering

Conductive Composite Materials Based on Thermally Stable Fluorine-Containing Polyamide and Binary Filler

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