Fabrication of nanoporous gold thin films on glass substrates for amperometric sensing of aniline

Citation data:

Journal of Alloys and Compounds, ISSN: 0925-8388, Vol: 713, Page: 132-137

Publication Year:
2017
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Abstract Views 22
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Readers 5
Citations 2
Citation Indexes 2
Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/21860
DOI:
10.1016/j.jallcom.2017.04.173
Author(s):
Lee, Keon-U; Tran, Trung Hieu; Kim, Sang Hoon; Shin, Hyung-Joon
Publisher(s):
Elsevier BV; ELSEVIER SCIENCE SA
Tags:
Engineering; Materials Science; Nanoporous gold; Heat-treatment; Sensor; Thin films
article description
Nanoporous gold (NP-Au) thin films were fabricated on glass substrates by dealloying an Au–Si alloy produced by co-deposition of Au and Si. Si was selectively removed from the Au–Si alloy with potassium hydroxide solution, which is a very simple and safe dealloying method. We investigated the optimum conditions for sputtering and dealloying to obtain stable and durable nanoporous films. The NP-Au films were used as a working electrode for amperometric sensing of aniline in water and exhibited a wider sensing range and lower detection limit than NP-Au electrodes fabricated on Si substrates with HF etchant. The larger surface roughness factor of the NP-Au sensor is responsible for the enhanced sensing performance.