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3 October 2006 Uniformly enhanced Raman scattering on arrays of silver nanoparticles separated by 5 nm gaps
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Abstract
Different arrays of Ag-nanoparticles grown on anodic alumina nanochannels with precisely tunable gaps (5~25 nm) are exploited for surface-enhanced Raman spectroscopy (SERS). The enhancement becomes significant for gaps below 10 nm and turns dramatically large when gaps reach an unprecedented value of 5 nm. The results are quantitatively consistent with theories based on collectively coupled surface plasmon. Such nanofabricated substrates with consistently uniform and large dynamic range have many chemical/biological sensing applications.
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H.-H. Wang, C.-Y. Liu, Y.-C. Huang, T.-T. Liu, C.-H. Lin, J.-K. Wang, and Y.-L. Wang "Uniformly enhanced Raman scattering on arrays of silver nanoparticles separated by 5 nm gaps", Proc. SPIE 6324, Plasmonics: Nanoimaging, Nanofabrication, and their Applications II, 63240Q (3 October 2006); https://doi.org/10.1117/12.682641
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