期刊
NANO LETTERS
卷 8, 期 11, 页码 4033-4038出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl802877h
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资金
- National Science Foundation and the U.S. Department of Energy [DE-AC02-05CHI1231]
Metal nanostructures that Support surface plasmons are compelling as plasmonic circuit elements and as the building blocks for metamaterials. We demonstrate here the spontaneous self-assembly of shaped silver nanoparticles into three-dimensional plasmonic crystals that display a frequency-selective response in the visible wavelengths. Extensive long-range order mediated by exceptional colloid monodispersity gives rise to optical passbands that can be tuned by particle volume fraction. These metallic supercrystals present a new paradigm for the fabrication of plasmonic materials, delivering a functional, tunable, completely bottom-up optical element that can be constructed on a massively parallel scale without lithography.
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