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- Title
Effect of gold nanoparticles on an aerosil surface on the fluorescence and Raman spectra of adsorbed tryptophan.
- Authors
Eremenko, A.; Smirnova, N.; Mukha, I.; Naumenko, A.; Belyi, N.; Hayden, S.
- Abstract
We discuss the fluorescence and Raman spectra of the amino acid tryptophan (Trp) in the presence of gold nanoparticles in solution and on the surface of highly dispersed silica (aerosil) containing gold nanoparticles (Au-SiO). The fluorescence of Trp is efficiently quenched in the presence of gold nanoparticles both in solution and on the SiO surface. The fluorescence and excitation spectra contain bands for molecular Trp and a charge transfer complex between Trp and the nanoparticles. In the Raman spectra of Trp with gold nanoparticles, considerably enhanced intense vibrations appear for the carboxyl and amino groups and also for the benzene and pyrrole rings. The effect of gold nanoparticles on the Raman spectra of Trp in a heterogeneous system is considerably weakened due to strong light scattering by the dispersed silica.
- Subjects
GOLD nanoparticles; FLUORESCENCE; RAMAN effect; TRYPTOPHAN; SILICA; QUENCHING (Chemistry); BENZENE derivatives; PYRROLE derivatives
- Publication
Theoretical & Experimental Chemistry, 2012, Vol 48, Issue 1, p54
- ISSN
0040-5760
- Publication type
Article
- DOI
10.1007/s11237-012-9242-1