Suzuki Motofumi, Maekita Wataru, Wada Yoshinori, Nagai Koji, Nakajima Kaoru, Kimura Kenji, Fukuoka Takao, Mori Yasushige
Department of Micro Engineering, Kyoto University, Kyoto 606-8501, Japan.
Nanotechnology. 2008 Jul 2;19(26):265304. doi: 10.1088/0957-4484/19/26/265304. Epub 2008 May 19.
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.
利用动态倾斜角沉积技术，我们展示了在具有强烈各向异性表面形态的氧化物模板层上直接形成长轴准平行的银纳米棒。通过改变沉积条件，无需任何预处理或后处理即可调节纳米棒的光学性质，所得的银纳米棒阵列表现出高表面增强拉曼散射（SERS）活性。除了在大面积上具有高宏观均匀性外，我们的纳米棒阵列还包含高密度的孤立纳米棒。使用最佳的银纳米棒阵列，成功展示了罗丹明6G溶液微滴的SERS成像。成像的空间分辨率至少为几微米量级。这些特性适用于生物材料的SERS成像。
