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Tunable Ordered Silver Nano-Arrays Prepared by TiO2 Templates as Surface-Enhanced Raman Scattering Substrates

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Surface-enhanced Raman spectroscopy has attracted much attention because it is a sensitive non-destructive technique offering the possibility of quantitative analysis down to the molecular level. Much research has hitherto been dedicated to the fabrication of substrates with high enhancement effects based on the electromagnetic or chemical mechanism. In this work, surfaced-enhanced Raman scattering is performed to probe rhodamine 6 g on highly-ordered multi-scale silver nano-arrays prepared by magnetron sputtering using templates with close end tubes of titania (TiO2) membranes. The surface morphology can be controlled by adjusting the anodization voltage and thickness of the silver film. This simple and flexible technique produces substrates with high enhancement factors stemming from controlled optimization of the hot spots. The electromagnetic field distribution is analyzed by finite difference time domain simulation and the theoretical and experimental results are in good agreement revealing the potential of rapid surfaced-enhanced Raman scattering detection. This low-cost and rapid technique can be readily scaled up for mass production.
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Keywords: ANODIZED TITANIA; NANOFABRICATION; SILVER NANO-ARRAYS; SURFACE-ENHANCED RAMAN SCATTERING

Document Type: Short Communication

Publication date: November 1, 2015

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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