Journal
APPLIED SURFACE SCIENCE
Volume 443, Issue -, Pages 613-618Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2018.02.202
Keywords
Surface-enhanced Raman scattering; Silver; TiO2; 2-Mercaptobenzoxazole; Recyclable
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Funding
- National Key Research and Development Program of China [2017YFA0204800]
- Major Research Plan of National Natural Science Foundation of China [91433111]
- Qing Lan Project
- Collaborative Innovation Center of Suzhou Nano Science Technology
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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The Ag-coated titanium dioxide nanotube arrays (Ag-coated TNTs) are obtained via the deposition of Ag nanoparticles on the two-step anodized TNTs. The wall thickness of TNTs is modulated via finite difference time domain simulation to get the favorable electromagnetic field for surface enhanced Raman scattering (SERS). Ag-coated TNTs with optimal wall thickness of 20 nm were employed as the SERS substrates to detect 2-mercaptobenzoxazole, which show superior detection sensitivity and uniformity. In addition, due to the photocatalysis of TNTs, the SERS substrates could clean themselves and be repeatedly used by photo-degradation of target molecules under the ultra-violet irradiation. The Ag-coated TNTs are a kind of bifunctional SERS substrates which can produce high-quality SERS signals and reuse to reduce the cost. (C) 2018 Elsevier B.V. All rights reserved.
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