Probing structures of nanomaterials using advanced electron microscopy methods, including aberration-corrected electron microscopy at the angstrom scale

Pratibha L. Gai, Kenta Yoshida, Carla Shute, Xiaoting Jia, Michael Walsh, Michael Ward, Mildred S. Dresselhaus, Julia R. Weertman, Edward D. Boyes

研究成果: Article査読

6 被引用数 (Scopus)

抄録

Structural and compositional studies of nanomaterials of technological importance have been carried out using advanced electron microscopy methods, including aberration-corrected transmission electron microscopy (AC-TEM), AC-high angle annular dark field scanning TEM (AC-HAADF-STEM), AC-energy filtered TEM, electron-stimulated energy dispersive spectroscopy in the AC-(S)TEM and high-resolution TEM (HRTEM) with scanning tunneling microscopy (STM) holder. The AC-EM data reveal improvements in resolution and minimization in image delocalization. A JEOL 2200FS double-AC field emission gun TEM/STEM operating at 200 kV in the Nanocentre at the University of York has been used to image single metal atoms on crystalline supports in catalysts, grain boundaries in nanotwinned metals, and nanostructures of tetrapods. Joule heating studies using HRTEM integrated with an STM holder reveal in situ crystallization and edge reconstruction in graphene. Real-time in situ AC-HAADF-STEM studies at elevated temperatures are described. Dynamic in-column energy filtering in an AC environment provides an integral new approach to perform dynamic in situ studies with aberration correction. The new results presented here open up striking new opportunities for atomic scale studies of nanomaterials and indicate future development directions.

本文言語English
ページ(範囲)664-670
ページ数7
ジャーナルMicroscopy Research and Technique
74
7
DOI
出版ステータスPublished - 2011 7 1
外部発表はい

ASJC Scopus subject areas

  • 解剖学
  • 組織学
  • 器械工学
  • 医療検査技術

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