Journal
APPLIED SURFACE SCIENCE
Volume 436, Issue -, Pages 391-397Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2017.11.212
Keywords
Surface-enhanced Raman scattering; Dragonfly wing; Silver; Magnetron sputtering; 4-aminothiophenol
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Funding
- Youth Fund Project of University Science and technology plan of Hebei Provincial Department of Education [QN2015004]
- Doctoral Fund of Yanshan University [B924]
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Natural dragonfly wing (DW), as a template, was deposited on noble metal sliver (Ag) nanoislands by magnetron sputtering to fabricate a flexible, low-cost, large-scale and environment-friendly surface-enhanced Raman scattering (SERS) substrate (Ag/DW substrate). Generally, materials with regular surface nanostructures are chosen for the templates, the selection of our new material with irregular surface nanostructures for substrates provides a new idea for the preparation of high-performance SERS-active substrates and many biomimetic materials. The optimum sputtering time of metal Ag was also investigated at which the prepared SERS-active substrates revealed remarkable SERS activities to 4-aminothiophenol (4-ATP) and crystal violet (CV). Even more surprisingly, the Ag/DW substrate with such an irregular template had reached the enhancement factor (EF) of similar to 1.05 x 10(5) and the detection limit of 10(-10) M to 4-ATP. The 3D finite-different time-domain (3D-FDTD) simulation illustrated that the hot spots between neighbouring Ag nanoislands at the top of pillars played a most important role in generating electromagnetic (EM) enhancement and strengthening Raman signals. (C) 2017 Elsevier B.V. All rights reserved.
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