2006年5月
In-line aligned and bottom-up Ag nanorods for surface-enhanced Raman spectroscopy
APPLIED PHYSICS LETTERS
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- 巻
- 88
- 号
- 20
- 開始ページ
- 203121
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1063/1.2205149
- 出版者・発行元
- AMER INST PHYSICS
We have demonstrated surface-enhanced Raman spectroscopy on arrays of Ag nanorods aligned in line by a dynamic oblique deposition technique. For the light polarized along the major axis of the nanorods, the plasma resonance of the Ag nanorods has been tuned to a wavelength suitable for Raman spectroscopy. The average width and the length-to-width ratio of the resulting nanorods are 56 nm and 3.5, respectively, and the nanorods align in line with small gaps of a few 10 nm. The Raman scattering for the polarized light along the nanorods is enhanced significantly as compared with that perpendicular to the nanorods. This polarization dependent Raman enhancement is attributed to the local field concentration at the ends of the nanorods. Since the preparation process is physical and completely bottom up, it is robust in its selection of the materials and is useful in providing the surface-enhanced Raman scattering sensors at low cost. (c) 2006 American Institute of Physics.
- リンク情報
- ID情報
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- DOI : 10.1063/1.2205149
- ISSN : 0003-6951
- Web of Science ID : WOS:000237682100084