Surface-plasmon enhanced Raman scattering of DNA molecules on regular arrays of modified gold nanoparticles

Ho-Jong Kim; Jae-Ho Song; Tae-Soo Kim; Byung-Jun Ahn; Yanqun Dong; Jung-Hoon Song; Sanghun Kim; Hee Jin Sohn; Dong Han Ha

doi:10.1364/CLEO.2010.CFA2

Conference on Lasers and Electro-Optics 2010
OSA Technical Digest (CD) (Optica Publishing Group, 2010),
paper CFA2
•https://doi.org/10.1364/CLEO.2010.CFA2

Surface-plasmon enhanced Raman scattering of DNA molecules on regular arrays of modified gold nanoparticles

Ho-Jong Kim, Jae-Ho Song, Tae-Soo Kim, Byung-Jun Ahn, Yanqun Dong, Jung-Hoon Song, Sanghun Kim, Hee Jin Sohn, and Dong Han Ha

Conference on Lasers and Electro-Optics 2010

San Jose, California United States
16–21 May 2010
ISBN: 978-1-55752-889-6

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Surface-Enhanced and Fiber Raman Technologies (CFA)

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H. Kim, J. Song, T. Kim, B. Ahn, Y. Dong, J. Song, S. Kim, H. J. Sohn, and D. H. Ha, "Surface-plasmon enhanced Raman scattering of DNA molecules on regular arrays of modified gold nanoparticles," in Conference on Lasers and Electro-Optics 2010, OSA Technical Digest (CD) (Optica Publishing Group, 2010), paper CFA2.

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Abstract

We performed surface-plasmon enhanced Raman scattering (SERS) studies of a DNA monolayer on chemically modified Au nanoparticle arrays. Drastic enhancement of Raman signal from DNA molecules was observed on the optimized templates that were prepared by using electron-beam lithography followed by chemical modification. We observed that Raman signal of DNA molecules was enhanced when the surface plasmons in the closely-spaced Au nanoparticles were resonantly excited. Our results suggest that the artificial generation of spatially controlled hot spots for SERS can be achieved by this technique.

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