4.6 Article

Tailoring a novel Au nanodot arrays on graphene substrate for a highly active Surface-Enhanced Raman Scattering (SERS)

Journal

MATERIALS LETTERS
Volume 271, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.matlet.2020.127807

Keywords

Surface-enhanced Raman spectroscopy (SERS); Trace detection; Gold nanodots (Au NDs); Graphene (GR); Rhodamine 6G (R6G)

Funding

  1. Lac Hong University, Vietnam [LHU-RF-TE-18-02-09]

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In this work, gold nanodots (Au NDs) were arrayed on the thin graphene (GR) layer, prepared by chemical vapor deposition, by focused ion beam technique. Following, GR/Au NDs substrates was evaluated of Surface-Enhanced Raman Scattering (SERS) by using rhodamine 6G (R6G) as a molecular probe. As expected, GR/Au NDs significantly enhanced the SERS signals. The limit of detection for R6G was as low as 10(-12) M and the Raman enhancement factor was as large as 10(8) times. GR/Au NDs SERS-active substrate showed a promising technique to enhance the trace detection and quantitative detection of organic contaminants. (C) 2020 Elsevier B.V. All rights reserved.

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