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Vol. 34, No. 8(3), S&M3042

Notice of retraction
Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.

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Sensors and Materials, Volume 29, Number 1 (2017)
Copyright(C) MYU K.K.
pp. 57-63
S&M1300 Research Paper
https://doi.org/10.18494/SAM.2017.1375
Published: January 25, 2017

An Aqueous Ammonia Sensor Based on Printed Indium Tin Oxide Layer [PDF]

Seokhwan Lee, Jung-Yeul Jung, Moonjin Lee, and Jiho Chang

(Received March 29, 2016; Accepted July 12, 2016)

Keywords: indium tin oxide (ITO), sensor, hazardous and noxious substance (HNS), ammonia sensor

We proposed an indium tin oxide (ITO) sensor for detecting NH3 in seawater and carried out a series of experiments to investigate the feasibility of using it as a hazardous and noxious substance (HNS) sensor. The ITO layer revealed a distinct resistance change, which was linearly correlated with the NH3 concentration at room temperature. The ITO layer was evaluated using a seawater and ammonium hydroxide (NH4OH) solution. The evaluation revealed an almost linear output signal up to an NH3 concentration of 5%. The sensitivity of the sensor showed a small temperature dependence within a 5–35 ℃ range. In addition, no significant degradation was observed during a 7-d-long durability test. The aqueous ammonia sensor based on a printed, porous ITO layer has been explained in terms of reduction reaction at the surface and the formation of an electrical double layer (EDL).

Corresponding author: Jiho Chang


Cite this article
Seokhwan Lee, Jung-Yeul Jung, Moonjin Lee, and Jiho Chang, An Aqueous Ammonia Sensor Based on Printed Indium Tin Oxide Layer, Sens. Mater., Vol. 29, No. 1, 2017, p. 57-63.



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