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Fabrication of printed ITO sensor for the ammonia hydroxide detection

Authors
Lee, S.-H.Koo, J.Jung, S.Lee, M.Jung, J.-Y.Chang, J.
Issue Date
2015
Publisher
SPIE
Keywords
Ammonia Hydroxide; hazardous and noxious substances (HNS); Indium Tin Oxide (ITO); Marine pollution; Sensor
Citation
Proceedings of SPIE - The International Society for Optical Engineering, v.9655
Journal Title
Proceedings of SPIE - The International Society for Optical Engineering
Volume
9655
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8669
DOI
10.1117/12.2193885
ISSN
0277-786X
Abstract
Monitoring the hazardous and noxious substances (HNS) is a very important issue for mitigating the influence of catastrophic accidents in ocean and coastal areas. However, research on the HNS sensor is just in the beginning stage. In this study, we proposed a new HNS sensor using a printed ITO layer. We carried out a series of experiments of detecting the NH4OH and seawater solution to investigate the feasibility as a HNS sensor. The resistance of ITO layer dropped abruptly when it soaked into the solutions. The resistance change (δR) was linearly correlated with the NH4OH concentration of the solution, also it can be classified into two states; one is the transition stage, the other is the stabilized stage. The former is considered to be caused by the large capacitance of the electrical double layer (EDL) on the ITO surface. Also, the ITO layer showed considerable chemical stability within our experimental condition. In this paper, we have investigated the feasibility of printed ITO layer as a sensitive and cheap HNS sensor. ? 2015 Copyright SPIE.
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해양공공디지털연구본부 (해사안전·환경연구센터)
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