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

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

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

Afiliación

Zheng YB; California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States.

Nano Lett ; 11(8): 3447-52, 2011 Aug 10.

Article en En | MEDLINE | ID: mdl-21749070

RESUMEN

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.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2011 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos

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