Journal
NANOSCALE
Volume 4, Issue 14, Pages 4228-4233Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2nr30212h
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Funding
- NIH [1R21EB011762]
- University of Texas at Dallas
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We report a structure-property relationship in gold nanoparticles (NPs), grain-size effects, which not only allow material properties observed on different characteristic length scales to be engineered in a single NP but further enhance those properties due to the coupling among different-size grains. The grain size effects were achieved by creating polycrystalline gold NPs (pAuNPs) with two distinct grain-size populations (5 and 1 nm) comparable to electron mean free path and electron Fermi wavelength (EFW), respectively. Successful integration of molecular and plasmonic properties into a single nanostructure without additional fluorophores enables these highly polycrystalline AuNPs to serve as multimodal probes in a variety of optical microscopic imaging techniques.
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