期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 113, 期 43, 页码 18623-18631出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp907646d
关键词
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资金
- Spanish MEC
- Spanish MICINN [PC12005-A7-0075, MAT2007-62696, MAT2007-66050]
- EU [CP-FP 213948-2, NMP4-2006-016881-SPANS, NMP4-SL-2008-213669-ENSEMBLE]
- The University of Melbourne through a Melbourne Research Office Fellowship
Gold nanodecahedra (pentagonal bipyramids) exhibit striking optical properties spanning the visible and near-IR spectral regions, which together with a high electric-field enhancement at their tips, makes them very promising materials for sensing-related applications. The effective design of biosensors based on these nanocrystals requires a detailed investigation, and understanding of their surface plasmon resonances. For that purpose, we have used correlated electron microscopy imaging and optical dark-field spectroscopy on individual decahedra to investigate their size and orientation-de pendent optical properties at the single particle level. We have also investigated the effects-of tip truncation and local refractive index changes on single particle plasmon resonances. The experimental results are supported by theoretical modeling based on a fully 3D, boundary element method (BEM-3D).
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