Room Temperature Detection Properties of a Surface Acoustic Wave Gas Sensor with Cu&lt;sup&gt;2+&lt;/sup&gt;/PANI/SnO&lt;sub&gt;2&lt;/sub&gt; Nanocomposite Thin Film to Nitric Oxide

Shen, Chien-Hua; Huang, Hsiang Min; Wang, Shih Han; Chiu, Yi-Wei

doi:10.4028/www.scientific.net/amm.312.732

Cited by 5 publications

(2 citation statements)

References 7 publications

(7 reference statements)

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“…The procedure used to produce the tungsten oxide and tin oxide/PANI solutions was similar to that employed in our previous studies [ 20 , 21 , 22 ]. Tungsten oxide gel was first synthesized and then mixed with an aniline precursor.…”

Section: Methodsmentioning

confidence: 99%

A Room Temperature Nitric Oxide Gas Sensor Based on a Copper-Ion-Doped Polyaniline/Tungsten Oxide Nanocomposite

Wang

Shen

et al. 2015

Sensors

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The parts-per-billion-level nitric oxide (NO) gas sensing capability of a copper-ion-doped polyaniline/tungsten oxide nanocomposite (Cu2+/PANI/WO3) film coated on a Rayleigh surface acoustic wave device was investigated. The sensor developed in this study was sensitive to NO gas at room temperature in dry nitrogen. The surface morphology, dopant distribution, and electric properties were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy mapping, and Hall effect measurements, respectively. The Cu2+/PANI/WO3 film exhibited high NO gas sensitivity and selectivity as well as long-term stability. At 1 ppb of NO, a signal with a frequency shift of 4.3 ppm and a signal-to-noise ratio of 17 was observed. The sensor exhibited distinct selectivity toward NO gas with no substantial response to O2, NH3 and CO2 gases.

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Section: Methodsmentioning

confidence: 99%

A Room Temperature Nitric Oxide Gas Sensor Based on a Copper-Ion-Doped Polyaniline/Tungsten Oxide Nanocomposite

Wang

Shen

et al. 2015

Sensors

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“…The adsorption/desorption of gas on the CP film on the gap modulates the wave propagation characters, and a frequency shift can be recorded between the input and output voltages. In the sense of applications, a SAW sensor based on fibrous PANI nanocomposites layers prepared by chemical oxidative polymerization of aniline in the presence of finely divided metal oxides deposited on ZnO/64° YX LiNbO 3 SAW transducer to detect H 2 , NO 2 , NO, CO 2 and CO gases [185][186][187][188]. The designed SAW sensor exhibited improved sensitivity and repeatability of the gas molecules in ppm level at room temperature.…”

Section: Surface Acoustic Wavementioning

confidence: 99%

Gas Sensors Based on Conducting Polymers

Torad¹,

Ayad²

2020

Gas Sensors

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Since the discovery of conducting polymers (CPs), their unique properties and tailor-made structures on-demand have shown in the last decade a renaissance and have been widely used in fields of chemistry and materials science. The chemical and thermal stability of CPs under ambient conditions greatly enhances their utilizations as active sensitive layers deposited either by in situ chemical or by electrochemical methodologies over electrodes and electrode arrays for fabricating gas sensor devices, to respond and/or detect particular toxic gases, volatile organic compounds (VOCs), and ions trapping at ambient temperature for environmental remediation and industrial quality control of production. Due to the extent of the literature on CPs, this chapter, after a concise introduction about the development of methods and techniques in fabricating CP nanomaterials, is focused exclusively on the recent advancements in gas sensor devices employing CPs and their nanocomposites. The key issues on nanostructured CPs in the development of state-of-the-art miniaturized sensor devices are carefully discussed. A perspective on next-generation sensor technology from a material point of view is demonstrated, as well. This chapter is expected to be comprehensive and useful to the chemical community interested in CPs-based gas sensor applications.

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