Spatial Anticorrelation between Nonlinear White-Light Generation and Single Molecule Surface-Enhanced Raman Scattering

作者：Walter Manfred J; Borys Nicholas J; Gaefke Gerald; Hoeger Sigurd; Lupton John M^*

来源：Journal of the American Chemical Society, 2008, 130(50): 16830-+.

DOI：10.1021/ja8054518

We investigate the correlation between plasmon-enhanced nonlinear white-light emission and single-molecule surface-enhanced Raman scattering (SERS) on fractal silver films using a conjugated polymer as a versatile analyte. Single molecule resonance SERS is preferentiatly observed from sample positions which do not exhibit nonlinear light emission under infrared excitation. The results suggest that the broad emission background often associated with single molecule SERS may not be intrinsic to the huge optical field amplifications characteristic of SERS. The two-photon imaging technique promises to offer a facile approach to prescreen substrates for their single molecule SERS capability.

• 出版日期2008-12-17