• 文献标题:   Raman Enhancement and Photo-Bleaching of Organic Dyes in the Presence of Chemical Vapor Deposition-Grown Graphene
  • 文献类型:   Article
  • 作  者:   WENG JX, ZHAO SC, LI ZT, RICARDO KB, ZHOU F, KIM H, LIU HT
  • 作者关键词:   graphene, hbn, dye, photobleaching, photostability, kinetic
  • 出版物名称:   NANOMATERIALS
  • ISSN:   2079-4991
  • 通讯作者地址:   Hangzhou Dianzi Univ
  • 被引频次:   1
  • DOI:   10.3390/nano7100337
  • 出版年:   2017

▎ 摘  要

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.