Fabrication of printed ITO sensor for the ammonia hydroxide detection

Seok-hwan Lee; Jieun Koo; Soohoon Jung; Moonjin Lee; Jung-Yeul Jung; Jiho Chang

doi:10.1117/12.2193885

1 July 2015 Fabrication of printed ITO sensor for the ammonia hydroxide detection

Seok-hwan Lee, Jieun Koo, Soohoon Jung, Moonjin Lee, Jung-Yeul Jung, Jiho Chang

Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 96553E (2015) https://doi.org/10.1117/12.2193885
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of

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.

Citation Download Citation

Seok-hwan Lee, Jieun Koo, Soohoon Jung, Moonjin Lee, Jung-Yeul Jung, and Jiho Chang "Fabrication of printed ITO sensor for the ammonia hydroxide detection", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96553E (1 July 2015); https://doi.org/10.1117/12.2193885

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