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Open AccessArticle

Raman Enhancement and Photo-Bleaching of Organic Dyes in the Presence of Chemical Vapor Deposition-Grown Graphene

1
College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
2
Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, PA 15260, USA
*
Authors to whom correspondence should be addressed.
Nanomaterials 2017, 7(10), 337; https://doi.org/10.3390/nano7100337
Received: 18 September 2017 / Revised: 10 October 2017 / Accepted: 16 October 2017 / Published: 19 October 2017
(This article belongs to the Special Issue Synthesis, Structure and Applications of 2D Nanomaterials)
Fluorescent organic dyes photobleach under intense light. Graphene has been shown to improve the photo-stability of organic dyes. In this paper, we investigated the Raman spectroscopy and photo-bleaching kinetics of dyes in the absence/presence of chemical vapor deposition (CVD)-grown graphene. We show that graphene enhances the Raman signal of a wide range of dyes. The photo-bleaching of the dyes was reduced when the dyes were in contact with graphene. In contrast, monolayer hexagonal boron nitride (h-BN) was much less effective in reducing the photo-bleaching rate of the dyes. We attribute the suppression of photo-bleaching to the energy or electron transfer from dye to graphene. The results highlight the potential of CVD graphene as a substrate for protecting and enhancing Raman response of organic dyes. View Full-Text
Keywords: graphene; h-BN; dye; photo-bleaching; photo-stability; kinetics graphene; h-BN; dye; photo-bleaching; photo-stability; kinetics
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MDPI and ACS Style

Weng, J.; Zhao, S.; Li, Z.; Ricardo, K.B.; Zhou, F.; Kim, H.; Liu, H. Raman Enhancement and Photo-Bleaching of Organic Dyes in the Presence of Chemical Vapor Deposition-Grown Graphene. Nanomaterials 2017, 7, 337.

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