Electron microscopy of gold nanoparticles at atomic resolution
Azubel, M., Koivisto, J., Malola, S., Bushnell, D., Hura, G. L., Koh, A. L., Tsunoyama, H., Tsukuda, T., Pettersson, M., Häkkinen, H., & Kornberg, R. D. (2014). Electron microscopy of gold nanoparticles at atomic resolution. Science, 345(6199), 909-912. https://doi.org/10.1126/science.1251959
© 2014, American Association for the Advancement of Science
Structure determination of gold nanoparticles (AuNPs) is necessary for understanding their physical and chemical properties, but only one AuNP larger than 1 nanometer in diameter [a 102–gold atom NP (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 a Au68NP at atomic resolution by aberration-corrected transmission electron microscopy, 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 and by comparison of observed infrared absorption spectra with calculations by density functional theory.
PublisherAmerican Association for the Advancement of Science
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