• 文献标题:   pH-dependent surface-enhanced Raman scattering of aromatic molecules on graphene oxide
  • 文献类型:   Article
  • 作  者:   LIU ZM, LI SX, HU CF, ZHANG W, ZHONG HQ, GUO ZY
  • 作者关键词:   graphene oxide, surfaceenhanced raman scattering, ph, aromatic molecule, adsorption
  • 出版物名称:   JOURNAL OF RAMAN SPECTROSCOPY
  • ISSN:   0377-0486 EI 1097-4555
  • 通讯作者地址:   S China Normal Univ
  • 被引频次:   9
  • DOI:   10.1002/jrs.4142
  • 出版年:   2013

▎ 摘  要

Graphene has become an ideal substrate for surface-enhanced Raman scattering (SERS) to study the chemical enhancement mechanism. In comparison with mechanically exfoliated graphene, graphene oxide (GO) has been found to be a better substrate due to its highly negatively charged oxygen functional groups. In this work, the pH-dependent SERS effect of aromatic molecules on GO are investigated. The results demonstrate that the Raman enhancement of dyes deposited on GO performs differently over a wide range of pH values (2 to 10). Adsorption experiments show that the pH-dependent SERS effect is closely related to the adsorption of aromatic molecules on GO, which is dominated by the electrostatic interaction. Thus, the influence of pH in GO-mediated SERS should be carefully considered, especially in its biomedical application. Copyright (C) 2012 John Wiley & Sons, Ltd.