期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 5, 期 1, 页码 131-137出版社
AMER CHEMICAL SOC
DOI: 10.1021/jz4022975
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资金
- Engineering and Physical Sciences Research Council U.K. (EPSRC) [EP/G070326/1]
- COST Action [MP0903]
- Birmingham Science City project (AWM)
- EPSRC [EP/G070326/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G070326/1] Funding Source: researchfish
Atomic-scale imaging using aberration-corrected scanning transmission electron microscopy reveals direct evidence for semicoherent interfacial epitaxy and coordinate-dependent surface contraction for the fcc (001) oriented Au nanoparticles (2-3 nm in diameter), suggesting that their interaction with the substrate is weaker than previously assumed. A significant change in interfacial separation distance from 2.47 +/- 0.12 angstrom for the fcc (001) oriented Au nanoparticles to 3.07 +/- 0.11 angstrom for the fcc (111) oriented Au nanoparticles has also been observed. These results are used to verify the atomistic models generated by the global optimization calculations, which shed further light on the intricate relation between the interfacial energy and the atomic structure of the nanoparticle and their combined effect on the inhomogeneous surface structural relaxation of supported nanoparticles.
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