Surface-enhanced raman spectroscopy to probe reversibly photoswitchable azobenzene in controlled nanoscale environments

Yue Bing Zheng, John L. Payton, Choong Heui Chung, Rong Liu, Sarawut Cheunkar, Bala Krishna Pathem, Yang Yang, Lasse Jensen, Paul S. Weiss

Research output: Contribution to journalArticlepeer-review

81 Scopus citations

Abstract

We apply in situ surface-enhanced Raman spectroscopy (SERS) to probe the reversible photoswitching of azobenzene-functionalized molecules inserted in self-assembled monolayers that serve as controlled nanoscale environments. Nanohole arrays are fabricated in Au thin films to enable SERS measurements associated with excitation of surface plasmons. A series of SERS spectra are recorded for azobenzene upon cycling exposure to UV (365 nm) and blue (450 nm) light. Experimental spectra match theoretical calculations. On the basis of both the simulations and the experimental data analysis, SERS provides quantitative information on the reversible photoswitching of azobenzene in controlled nanoscale environments.

Original languageEnglish (US)
Pages (from-to)3447-3452
Number of pages6
JournalNano letters
Volume11
Issue number8
DOIs
StatePublished - Aug 10 2011

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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