Plasmonic nanocoatings tailored for surface-enhanced Raman imaging in near-infrared region

Motofumi Suzuki; Wataru Maekita; Yoshinori Wada; Shuyi Li; Kaoru Nakajima; Kenji Kimura; Takao Fukuoka; Yasushige Mori

doi:10.1117/12.731989

10 September 2007 Plasmonic nanocoatings tailored for surface-enhanced Raman imaging in near-infrared region

Motofumi Suzuki, Wataru Maekita, Yoshinori Wada, Shuyi Li, Kaoru Nakajima, Kenji Kimura, Takao Fukuoka, Yasushige Mori

Proceedings Volume 6647, Nanocoatings; 664707 (2007) https://doi.org/10.1117/12.731989
Event: NanoScience + Engineering, 2007, San Diego, California, United States

Abstract

Using a dynamic oblique-angle deposition technique, we have demonstrated the direct formation of Ag nanorods with quasiparallel major axes on a template layer of oxide having a strongly anisotropic surface morphology. The optical properties of the nanorods are tuned by the deposition conditions without any pre- or post-treatment, and the resulting nanocoatings containing the Ag nanorods exhibit high surface-enhanced Raman scattering (SERS) activity. In addition to high uniformity over a large area, our nanocoatings contain a large number of isolated nanorods with a high density. Using the optimum Ag nanorods, SERS imaging of microdroplets of a rhodamine 6G solution has been successfully demonstrated. The space resolution of the imaging is of the order of at least a few μm. These features are quite appropriate for the SERS imaging of biomaterials.

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Motofumi Suzuki, Wataru Maekita, Yoshinori Wada, Shuyi Li, Kaoru Nakajima, Kenji Kimura, Takao Fukuoka, and Yasushige Mori "Plasmonic nanocoatings tailored for surface-enhanced Raman imaging in near-infrared region", Proc. SPIE 6647, Nanocoatings, 664707 (10 September 2007); https://doi.org/10.1117/12.731989

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KEYWORDS

Silver

Nanorods

Surface enhanced Raman spectroscopy

Raman spectroscopy

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