Abstract
Using a dynamic oblique angle deposition technique, we demonstrate the direct formationof Ag nanorods with quasi-parallel major axes on a template layer of oxide having astrongly anisotropic surface morphology. The optical properties of the nanorods are tunedby varying the deposition conditions without any pre- or post-treatment, and the resultingAg nanorod arrays exhibit high surface-enhanced Raman scattering (SERS) activity. Inaddition to high macroscopic uniformity over a large area, our nanorod arrays contain ahigh density of isolated nanorods. Using the optimum Ag nanorod arrays, theSERS imaging of the microdroplets of a rhodamine 6G solution is successfullydemonstrated. The space resolution of the imaging is of the order of at least a fewµm. These features are suitable for the SERS imaging of biomaterials.
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