Ag nanorod arrays tailored for surface-enhanced Raman imaging in the near-infrared region

Using a dynamic oblique angle deposition technique, we demonstrate the direct formation of Ag nanorods with quasi-parallel major axes on a template layer of oxide having a strongly anisotropic surface morphology. The optical properties of the nanorods are tuned by varying the deposition conditions w...

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Published inNanotechnology Vol. 19; no. 26; pp. 265304 - 265304 (7)
Main Authors Suzuki, Motofumi, Maekita, Wataru, Wada, Yoshinori, Nagai, Koji, Nakajima, Kaoru, Kimura, Kenji, Fukuoka, Takao, Mori, Yasushige
Format Journal Article
LanguageEnglish
Published England IOP Publishing 02.07.2008
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Summary:Using a dynamic oblique angle deposition technique, we demonstrate the direct formation of Ag nanorods with quasi-parallel major axes on a template layer of oxide having a strongly anisotropic surface morphology. The optical properties of the nanorods are tuned by varying the deposition conditions without any pre- or post-treatment, and the resulting Ag nanorod arrays exhibit high surface-enhanced Raman scattering (SERS) activity. In addition to high macroscopic uniformity over a large area, our nanorod arrays contain a high density of isolated nanorods. Using the optimum Ag nanorod arrays, the SERS imaging of the microdroplets of a rhodamine 6G solution is successfully demonstrated. The space resolution of the imaging is of the order of at least a few µm. These features are suitable for the SERS imaging of biomaterials.
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ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/19/26/265304