STEM Electron Diffraction and High-Resolution Images Used in the Determination of the Crystal Structure of the Au144(SR)60 Cluster

被引：97

作者：

Bahena, Daniel ^{[1
]}

Bhattarai, Nabraj ^{[1
]}

Santiago, Ulises ^{[1
]}

Tlahuice, Alfredo ^{[1
]}

Ponce, Arturo ^{[1
]}

Bach, Stephan B. H. ^{[2
]}

Yoon, Bokwon ^{[3
]}

Whetten, Robert L. ^{[1
,4
]}

Landman, Uzi ^{[3
]}

Jose-Yacaman, Miguel ^{[1
]}

机构：

[1] Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX 78249 USA

[2] Univ Texas San Antonio, Dept Chem, San Antonio, TX 78249 USA

[3] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA

[4] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2013年 / 4卷 / 06期

基金：

美国国家科学基金会; 美国国家卫生研究院;

关键词：

GOLD; NANOPARTICLES; CORE;

D O I：

10.1021/jz400111d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Determination of the total structure of molecular nanocrystals is an outstanding experimental challenge that has been met, in only a few cases, by single-crystal X-ray diffraction. Described here is an alternative approach that is of most general applicability and does not require the fabrication of a single crystal. The method is based on rapid, time-resolved nanobeam electron diffraction (NBD) combined with high-angle annular dark field scanning/transmission electron microscopy (HAADF-STEM) images in a probe corrected STEM microscope, operated at reduced voltages. The results are compared with theoretical simulations of images and diffraction patterns obtained from atomistic structural models derived through first-principles density functional theory (DFT) calculations. The method is demonstrated by application to determination of the structure of the Au-144(SCH2CH2Ph)(60) cluster.

引用

页码：975 / 981

页数：7

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