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신형준

Shin, Hyung-Joon
Nanoscale Materials Science Lab.
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Fabrication of nanoporous gold thin films on glass substrates for amperometric sensing of aniline

Author(s)
Lee, Keon-UTran, Trung HieuKim, Sang HoonShin, Hyung-Joon
Issued Date
2017-08
DOI
10.1016/j.jallcom.2017.04.173
URI
https://scholarworks.unist.ac.kr/handle/201301/21860
Fulltext
http://www.sciencedirect.com/science/article/pii/S0925838817313725
Citation
JOURNAL OF ALLOYS AND COMPOUNDS, v.713, pp.132 - 137
Abstract
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.
Publisher
ELSEVIER SCIENCE SA
ISSN
0925-8388
Keyword (Author)
Nanoporous goldHeat-treatmentSensorThin films
Keyword
DOPED DIAMOND ELECTRODESELECTROCHEMICAL OXIDATIONCYCLIC VOLTAMMETRYGASTEMPERATUREACTUATIONLIQUID

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