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Journal of Biomedical Optics

Time-resolved observation of surface-enhanced Raman scattering from gold nanoparticles during transport through a living cell
Author(s): Katsumasa Fujita; Sawako Ishitobi; Keisaku Hamada; Nicholas Isaac Smith; Atsushi Taguchi; Yasushi Inouye; Satoshi Kawata
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Paper Abstract

We perform time-resolved observation of living cells with gold nanoparticles using surface-enhanced Raman scattering (SERS). The position and SERS spectra of 50-nm gold nanoparticles are simultaneously observed by slit-scanning Raman microscopy with high spatial and temporal resolution. From the SERS observation, we confirm the attachment of the particles on the cell surface and the entry into the cell with the subsequent generation of SERS signals from nearby molecules. We also confirm that the strong dependence of SERS spectra on the position of the particle during the transportation of the particle through the cell. The obtained SERS spectra and its temporal fluctuation indicate that the molecular signals observable by this technique are given only from within a limited volume in close proximity to the nanoparticles. This confirms the high spatial selectivity and resolution of SERS imaging for observation of biomolecules involved in cellular events in situ.

Paper Details

Date Published: 1 March 2009
PDF: 7 pages
J. Biomed. Opt. 14(2) 024038 doi: 10.1117/1.3119242
Published in: Journal of Biomedical Optics Volume 14, Issue 2
Show Author Affiliations
Katsumasa Fujita, Osaka Univ. (Japan)
Sawako Ishitobi, Osaka Univ. (Japan)
Keisaku Hamada, Osaka Univ. (Japan)
Nicholas Isaac Smith, Osaka Univ. (Japan)
Atsushi Taguchi, Osaka Univ. (Japan)
Yasushi Inouye, Osaka Univ. (Japan)
Satoshi Kawata, Osaka Univ. (Japan)


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