Enhanced Raman Scattering on Nine 2D van der Waals Materials

Hikari Kitadai, Xingzhi Wang, Nannan Mao, Shengxi Huang, Xi Ling

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Since the discovery of graphene-enhanced Raman scattering in 2010, other 2D materials have been reported to show a Raman enhancement effect on molecules adsorbed on their surfaces. The mechanism for this phenomenon, however, still remains elusive. Here we performed a comparative investigation of the Raman enhancement effect on nine 2D materials with an identical number of copper phthalocyanine (CuPc) as probe molecules. Furthermore, the degree of charge transfer for different CuPc/2D material combinations was calculated, and a positive correlation with enhancement factors was observed, providing evidence to support the charge-transfer-dominated chemical mechanism for this amplification. This study also suggests that Raman enhancement spectroscopy can be used as a nondestructive and rapid probe for the interface interaction between molecules and 2D materials, crucial for organic molecule/2D material-based electronic and optoelectronic devices.

Original languageEnglish (US)
Pages (from-to)3043-3050
Number of pages8
JournalJournal of Physical Chemistry Letters
Issue number11
StatePublished - Jun 6 2019

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Physical and Theoretical Chemistry


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