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

Nanomaterials

Shichao Zhao¹  Jiaxin Weng¹  Feng Zhou²  Karen B. Ricardo²  Zhiting Li²  Hyojeong Kim²  Haitao Liu² 

[1] College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, PA 15260, USA;

关键词: graphene;    h-BN;    dye;    photo-bleaching;    photo-stability;    kinetics;   

DOI  :  10.3390/nano7100337

来源: DOAJ

【 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.

【 授权许可】

Unknown