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Nano-engineered surface-enhanced Raman scattering (SERS) substrates with patterned structures on the distal end of optical fibers

Publication ,  Journal Article
Dhawan, A; Zhang, Y; Yan, F; Gerhold, M; Vo-Dinh, T
Published in: Progress in Biomedical Optics and Imaging - Proceedings of SPIE
April 21, 2008

This paper describes the development of fiber optic sensor probes and planar substrates containing patterned nanostructures such as nanoholes in gold films, as well as gold nanoparticles, nano-pillars, nanorods, and nano-islands. Several methods of producing gold nanofeatures on fiber tips and planar substrates were investigated such as annealing of thin gold films and focused ion beam (FIB) milling. A Hitachi FB-2100 FIB milling machine with a gallium ion source was employed to form the nanoparticles from 20-100 nm gold films deposited on the fiber tip. Nano-engineered gold features were also formed by coating planar substrates and fiber tips with thin gold films (4-10 nm) and annealing these thin films. Excitation of surface plasmons in gold nanostructures leads to substantial enhancement in the Raman scattering signal obtained from molecules attached to the nanostructure surface. In this work, a comparison was made between the SERS signals obtained from the gold substrates developed by employing the different procedures mentioned above. Fiber samples and planar substrates with these nanostructures were coated with SERS active dyes such as p-mercaptobenzoic acid (pMBA) and cresyl fast violet (CFV). It was observed that the SERS signal obtained from these gold nanofeatures was much higher than that obtained from a continuous gold film and that the SERS enhancement was shape and size dependent.

Duke Scholars

Published In

Progress in Biomedical Optics and Imaging - Proceedings of SPIE

DOI

ISSN

1605-7422

Publication Date

April 21, 2008

Volume

6869
 

Citation

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Dhawan, A., Zhang, Y., Yan, F., Gerhold, M., & Vo-Dinh, T. (2008). Nano-engineered surface-enhanced Raman scattering (SERS) substrates with patterned structures on the distal end of optical fibers. Progress in Biomedical Optics and Imaging - Proceedings of SPIE, 6869. https://doi.org/10.1117/12.763879
Dhawan, A., Y. Zhang, F. Yan, M. Gerhold, and T. Vo-Dinh. “Nano-engineered surface-enhanced Raman scattering (SERS) substrates with patterned structures on the distal end of optical fibers.” Progress in Biomedical Optics and Imaging - Proceedings of SPIE 6869 (April 21, 2008). https://doi.org/10.1117/12.763879.
Dhawan A, Zhang Y, Yan F, Gerhold M, Vo-Dinh T. Nano-engineered surface-enhanced Raman scattering (SERS) substrates with patterned structures on the distal end of optical fibers. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. 2008 Apr 21;6869.
Dhawan, A., et al. “Nano-engineered surface-enhanced Raman scattering (SERS) substrates with patterned structures on the distal end of optical fibers.” Progress in Biomedical Optics and Imaging - Proceedings of SPIE, vol. 6869, Apr. 2008. Scopus, doi:10.1117/12.763879.
Dhawan A, Zhang Y, Yan F, Gerhold M, Vo-Dinh T. Nano-engineered surface-enhanced Raman scattering (SERS) substrates with patterned structures on the distal end of optical fibers. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. 2008 Apr 21;6869.

Published In

Progress in Biomedical Optics and Imaging - Proceedings of SPIE

DOI

ISSN

1605-7422

Publication Date

April 21, 2008

Volume

6869