Journal
APPLIED SURFACE SCIENCE
Volume 333, Issue -, Pages 126-133Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2015.02.007
Keywords
Ag; Concave surface; SERS; Reproducible; Recyclable
Categories
Funding
- Research Grants Council of Hong Kong SAR [CityU 103812]
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Direct synthesis of three-dimensional Ag structures on solid substrates for the purposes of producing reproducible and recyclable surface-enhanced Raman scattering (SERS) applications remains challenging. In this work, flower-like Ag structures with concave surfaces (FACS) were successfully electrodeposited onto ITO glass using the double-potentio static method. The FACS, with an enhancement factor of the order of 10(8), exhibited a SERS signal intensity 3.3 times stronger than that measured from Ag nanostructures without concave surfaces. A cleaning procedure involving lengthy immersion of the sample in ethanol and KNO3 was proposed to recycle the substrate and confirmed by using rhodamine 6G, adenine, and 4-aminothiophenol as target molecules. The findings can help to advance the practical applications of Ag nanostructure-based SERS substrates. (C) 2015 Elsevier B.V. All rights reserved.
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