Journal
APPLIED SURFACE SCIENCE
Volume 347, Issue -, Pages 569-573Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2015.04.152
Keywords
SERS; Au nanoparticles; Deposition; R6G; Crystal violet
Categories
Funding
- China Postdoctoral Science Foundation [2012M520078, 2013T60861]
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials [12zxfk15, 11zxfk26]
- Southwest University of Science and Technology [13zx9108]
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In this study, Au nanoparticle (5 nm) colloid was employed for a facile preparation of SERS substrates from three approaches: (1) original Au nanoparticles, (b) Au colloid coated 200 nm polystyrene (PS) beads, and (3) Au colloid annealed at 200-500 degrees C. Rhodamine 6G (R6G) and crystal violet were employed as the Raman active probes. The Au colloid deposited PS beads (PS@Au) exhibit intensive SERS signal for R6G detection, which is promising for crystal violet detection after being annealed at 400 degrees C. The 200 degrees C annealed Au nanoparticles demonstrate excellent combined SERS sensitivity for both R6G and crystal violet. For the original Au colloid, elevated annealing temperature from 200 degrees C to 500 degrees C decreases the SERS intensity as Au particles were coarsened gradually. (C) 2015 Elsevier B.V. All rights reserved.
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