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12 April 2013 Surface-enhanced Raman scattering on diatom biosilica photonic crystals
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Diatoms are a group of single-celled photosynthetic algae that make skeletal shells of hydrated amorphous silica, called frustules, which possess hierarchical nanoscale photonic crystal features made by a bottom-up approach at ambient temperature and pressure. In this paper, we theoretically investigate electric field enhancements of plasmonic nanoparticles coated on the surface of diatom skeletal shells. Surface-Enhanced Raman Scattering substrates are prepared by evaporating 10 nm thick silver film and self-assembling silver nanoparticles on diatom surfaces, which show significantly better SERS signals than silver nanoparticles on flat glass substrates.
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Fanghui Ren, Jeremy Campbell, Dihan Hasan, Xiangyu Wang, Gregory L. Rorrer, and Alan X. Wang "Surface-enhanced Raman scattering on diatom biosilica photonic crystals", Proc. SPIE 8598, Bioinspired, Biointegrated, Bioengineered Photonic Devices, 85980N (12 April 2013);

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