Chemiresistive Sensor Array Based on Semiconducting Metal Oxides for Environmental Monitoring

Authors
문희규한수덕강민규정우석장호원유광수박형호강종윤
Issue Date
2014-02
Publisher
한국센서학회
Citation
센서학회지, v.23, no.1, pp.15 - 18
Abstract
We present gas sensing performance based on 2X2 sensor array with four different elements (TiO2, SnO2, WO3 and In2O3 thin films) fabricated by rf sputter. Each thin film was deposited onto the selected SiO2/Si substrate with Pt interdigitated electrodes (IDEs) of 5 ㎛ spacing which were fabricated on a SiO2/Si substrate using photolithography and dry etching. For 5 ppm NO2 and 50 ppm CO, each thin film sensor has a different response to offers the distinguishable response pattern for different gas molecules. Compared with the conventional micro-fabrication technology, 2X2 sensor array with such remarkable response pattern will be open a new foundation for monolithic integration of high-performance chemoresistive sensors with simplicity in fabrication, low cost, high reliablity, and multifunctional smart sensors for environmental monitoring.
Keywords
Gas sensors; Oxide semiconductors; TiO2; SnO2; WO3; In2O3; Chemiresistive thin film sensor array
ISSN
1225-5475
URI
https://pubs.kist.re.kr/handle/201004/127129
DOI
10.5369/JSST.2014.23.1.15
Appears in Collections:
KIST Article > 2014
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