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Surface-Enhanced Raman Spectroscopy (SERS) Study Using Oblique Angle Deposition of Ag Using Different Substrates

1,2,†, 1,†, 1,2 and 1,2,*
1
Department of Energy Systems Research, Ajou University, Suwon 16499, Korea
2
Department of Materials Science and Engineering, Ajou University, Suwon 16499, Korea
*
Author to whom correspondence should be addressed.
Both authors equally contributed to the work.
Materials 2019, 12(10), 1581; https://doi.org/10.3390/ma12101581
Received: 11 April 2019 / Revised: 7 May 2019 / Accepted: 13 May 2019 / Published: 14 May 2019
(This article belongs to the Special Issue Surface and Interface Engineering)
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Abstract

The oblique angle deposition of Ag with different deposition rates and substrates was studied for surface-enhanced Raman spectroscopy (SERS) efficiency. The deposition rate for the Ag substrate with maximum SERS efficiency was optimized to 2.4 Å/s. We also analyzed the morphology of Ag nanorods deposited at the same rate on various substrates and compared their SERS intensities. Ag deposited on SiO2, sapphire, and tungsten showed straight nanorods shape and showed relatively high SERS efficiency. However, Ag deposited on graphene or plasma-treated SiO2 substrate was slightly or more aggregated (due to high surface energy) and showed low SERS efficiency. View Full-Text
Keywords: oblique deposition; SERS; Ag nanogap oblique deposition; SERS; Ag nanogap
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Lee, J.; Min, K.; Kim, Y.; Yu, H.K. Surface-Enhanced Raman Spectroscopy (SERS) Study Using Oblique Angle Deposition of Ag Using Different Substrates. Materials 2019, 12, 1581.

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