• 文献标题:   Demonstration of Improved Charge Transfer in Graphene/Au Nanorods Plasmonic Hybrids Stabilized by Benzyl Thiol Linkers
  • 文献类型:   Article
  • 作  者:   BIANCO GV, GIANGREGORIO MM, LOSURDO M, SACCHETTI A, CAPEZZUTO P, BRUNO G
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF NANOMATERIALS
  • ISSN:   1687-4110 EI 1687-4129
  • 通讯作者地址:   CNR
  • 被引频次:   2
  • DOI:   10.1155/2016/2561326
  • 出版年:   2016

▎ 摘  要

Hybrids based on graphene decorated with plasmonic gold (Au) nanostructures are being investigated as possible materials combination to add to graphene functionalities of tunable plasmon resonance and enhanced absorption at selected wavelength in the visible-near-infrared region of the spectrum. Here, we report a solution drop-casting approach for fabricating stable hybrids based on chemical vapor deposition (CVD) graphene and Au nanorods, which are able to activate effective charge transfer from graphene. We demonstrate that CVD graphene functionalization by benzyl thiol (BZT) provides the linker to strong anchoring, via S-Au bonds, Au nanorods to graphene. Optical measurements by spectroscopic ellipsometry give evidence of the introduction of plasmon resonances at 1.85 and 2.25 eV in the Au nanorods/BZT/graphene hybrids, which enable surface enhanced Raman scattering (SERS) detection. Furthermore, an effective electron transfer from graphene to Au nanorods, resulting in an enhancement of p-type doping of graphene with a consequent decrease of its sheet resistance, is probed by Raman spectroscopy and corroborated by electrical measurements.