Nanoparticle imaging. Electron microscopy of gold nanoparticles at atomic resolution.
Nanoparticle imaging. Electron microscopy of gold nanoparticles at atomic resolution.
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DOI:
10.1126/science.1251959
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发表时间:
2014-08-22
期刊:
影响因子:
--
通讯作者:
Kornberg RD
中科院分区:
文献类型:
--
作者:
Azubel M;Koivisto J;Malola S;Bushnell D;Hura GL;Koh AL;Tsunoyama H;Tsukuda T;Pettersson M;Häkkinen H;Kornberg RD
Structure determination of gold nanoparticles (AuNPs) is necessary for understanding their physical and chemical properties, and only one AuNP larger than 1 nm in diameter, an Au102NP, has been solved to atomic resolution. Whereas the Au102NP structure was determined by X-ray crystallography, other large AuNPs have proved refractory to this approach. Here we report the structure determination of an Au68NP at atomic resolution by aberration-corrected transmission electron microscopy (AC-TEM), performed with the use of a minimal electron dose, an approach that should prove applicable to metal NPs in general. The structure of the Au68NP was supported by small angle X-ray scattering (SAXS) and by comparison of observed infrared (IR) absorption spectra with calculations by density functional theory (DFT).
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DOI:
10.1073/pnas.0801001105
发表时间:
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影响因子:
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通讯作者:
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