Insights into the physical chemistry of materials from advances in HAADF-STEM

Sohlberg, Karl; Pennycook, Timothy J.; Zhou, Wu; Pennycook, Stephen J.

doi:10.1039/C4CP04232H

Title: Insights into the physical chemistry of materials from advances in HAADF-STEM

Journal Article · Thu Nov 13 00:00:00 EST 2014 · Physical Chemistry Chemical Physics. PCCP

DOI:https://doi.org/10.1039/C4CP04232H· OSTI ID:1185797

Sohlberg, Karl ^[1]; Pennycook, Timothy J. ^[2]; Zhou, Wu ^[3]; Pennycook, Stephen J. ^[4]

Drexel Univ., Philadelphia, PA (United States)
SuperSTEM Lab., Daresbury (United Kingdom); Univ. of Oxford (United Kingdom)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States)

The observation that, ‘‘New tools lead to new science’’[P. S. Weiss, ACS Nano., 2012, 6(3), 1877–1879], is perhaps nowhere more evident than in scanning transmission electron microscopy (STEM). Advances in STEM have endowed this technique with several powerful and complimentary capabilities. For example, the application of high-angle annular dark-field imaging has made possible real-space imaging at subangstrom resolution with Z-contrast (Z = atomic number). Further advances have wrought: simultaneous real-space imaging and elemental identification by using electron energy loss spectroscopy (EELS); 3-dimensional (3D) mapping by depth sectioning; monitoring of surface diffusion by time-sequencing of images; reduced electron energy imaging for probing graphenes; etc. In this paper we review how these advances, often coupled with first-principles theory, have led to interesting and important new insights into the physical chemistry of materials. We then review in detail a few specific applications that highlight some of these STEM capabilities.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1185797

Journal Information:: Physical Chemistry Chemical Physics. PCCP, Vol. 17, Issue 6; ISSN 1463-9076

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 57 works

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