Analytical Sciences

Abstract − Analytical Sciences, 23(7), 829 (2007).

Au Nanorod Arrays Tailored for Surface-Enhanced Raman Spectroscopy
Motofumi SUZUKI,* Kaoru NAKAJIMA,* Kenji KIMURA,* Takao FUKUOKA,** and Yasushige MORI***
*Department of Micro Engineering, Kyoto University, Kyoto 606-8501, Japan
**JST Kyoto Pref. CREATE, Seika, Kyoto 619-0237, Japan
***Department of Chemical Engineering and Materials Science, Doshisha University, Kyotanabe, Kyoto 610-0394, Japan
We have demonstrated surface-enhanced Raman spectroscopy (SERS) on arrays of Au nanorods aligned in line by a dynamic oblique deposition technique. For light polarized along the major axes of the nanorods, the plasma resonance of the Au nanorods has been tuned to a wavelength suitable for Raman spectroscopy. Raman scattering on the discrete nanorods is significantly enhanced compared with that on semicontinuous Au films. Since the preparation process is physically bottom-up, it is robust in its selection of the materials and is useful for providing SERS sensors at low cost.