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Proceedings Paper

Characterizing the spectral reproducibility of quartz-bound Au nanoparticle substrates for surface-enhanced Raman spectroscopy
Author(s): William N. Radicic; Eric V. Ni; Christin Tombrello; Augustus W. Fountain III
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Paper Abstract

Visible extinction and Surface Enhanced Raman Scattering (SERS) spectra using quartz-bound Au nanoparticle substrates are used to identify substrate production-related sources of spectral variability. Hydrosol Au nanoparticle size distributions are known to affect SERS enhancement, but the effect of spatial orientation and nanoparticle physiosorption during substrate preparation on spectral reproducibility and performance are not well understood. Experiments varying quartz slide orientation and Au nanoparticle delivery method show significant concentrationgradient and physiosorption-related aggregation effects in the substrate extinction spectra and SERS spectra of R6G applied to spatially mapped substrate regions. Additionally, applying multiple Au hydrosol treatments to functionalized quartz substrates reveals interesting relationships between Au nanoparticle thickness and substrate extinction and SERS spectra. Of the many factors affecting substrate spectral reproducibility, minimizing concentration gradients and optimizing the rate of Au nanoparticle-quartz physiosorption allow improvements in SERS active substrate spectral reproducibility.

Paper Details

Date Published: 19 May 2006
PDF: 9 pages
Proc. SPIE 6218, Chemical and Biological Sensing VII, 621803 (19 May 2006); doi: 10.1117/12.664078
Show Author Affiliations
William N. Radicic, U. S. Military Academy (United States)
Eric V. Ni, U. S. Military Academy (United States)
Christin Tombrello, U. S. Military Academy (United States)
Augustus W. Fountain III, U. S. Military Academy (United States)

Published in SPIE Proceedings Vol. 6218:
Chemical and Biological Sensing VII
Patrick J. Gardner; Augustus W. Fountain III, Editor(s)

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