18 June 2001 Optical spectroscopy of molecules on metallic nanoparticles and on nanostructured metallic surfaces
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Proceedings Volume 4258, Nanoparticles and Nanostructured Surfaces: Novel Reporters with Biological Applications; (2001) https://doi.org/10.1117/12.430760
Event: BiOS 2001 The International Symposium on Biomedical Optics, 2001, San Jose, CA, United States
Abstract
In the vicinity of small metal particles in dimensions of tens of nanometers or close to nanostructured metallic surfaces, local optical fields can be strongly enhanced due to resonances with collective excitation of the conduction electrons in these metallic nanostructures. These enhanced local fields open up exciting opportunities for enhancing spectroscopic signals and to perform spectroscopy on single molecules. We report surface-enhanced Raman studies on silver and gold nanostructures. The field strengths in the hot spots on silver and gold colloidal cluster structures are inferred to be enhanced on the order of 103 resulting in field enhancement factors for Raman scattering up to 1012. Simultaneously, as a further advantage for Raman spectroscopy, the fluorescence of the target molecules is quenched by new non-radiative decay channels to the metal.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Katrin D. Kneipp, Katrin D. Kneipp, Harald Kneipp, Harald Kneipp, Irving Itzkan, Irving Itzkan, Ramachandra R. Dasari, Ramachandra R. Dasari, Michael S. Feld, Michael S. Feld, } "Optical spectroscopy of molecules on metallic nanoparticles and on nanostructured metallic surfaces", Proc. SPIE 4258, Nanoparticles and Nanostructured Surfaces: Novel Reporters with Biological Applications, (18 June 2001); doi: 10.1117/12.430760; https://doi.org/10.1117/12.430760
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