+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Oxidation-state sensitive imaging of cerium dioxide by atomic-resolution low-angle annular dark field scanning transmission electron microscopy



Oxidation-state sensitive imaging of cerium dioxide by atomic-resolution low-angle annular dark field scanning transmission electron microscopy



Ultramicroscopy 162: 52-60



Low-angle annular dark field (LAADF) scanning transmission electron microscopy (STEM) imaging is presented as a method that is sensitive to the oxidation state of cerium ions in CeO2 nanoparticles. This relationship was validated through electron energy loss spectroscopy (EELS), in situ measurements, as well as multislice image simulations. Static displacements caused by the increased ionic radius of Ce(3+) influence the electron channeling process and increase electron scattering to low angles while reducing scatter to high angles. This process manifests itself by reducing the high-angle annular dark field (HAADF) signal intensity while increasing the LAADF signal intensity in close proximity to Ce(3+) ions. This technique can supplement STEM-EELS and in so doing, relax the experimental challenges associated with acquiring oxidation state information at high spatial resolutions.

(PDF emailed within 0-6 h: $19.90)

Accession: 058488364

Download citation: RISBibTeXText

PMID: 26744830

DOI: 10.1016/j.ultramic.2015.12.004


Related references

Quantitative atomic resolution mapping using high-angle annular dark field scanning transmission electron microscopy. Ultramicroscopy 109(10): 1236-1244, 2009

Atomic Resolution Mapping Using Quantitative High-angle Annular Dark Field Scanning Transmission Electron Microscopy. Microscopy and Microanalysis 15(S2): 464-465, 2009

Simulation of atomic-scale high-angle annular dark field scanning transmission electron microscopy images. Journal of Electron Microscopy 49(6): 753-759, 2001

Quantitative composition determination at the atomic level using model-based high-angle annular dark field scanning transmission electron microscopy. Ultramicroscopy 137: 12-19, 2013

Application of high-angle annular dark field scanning transmission electron microscopy, scanning transmission electron microscopy-energy dispersive X-ray spectrometry, and energy-filtered transmission electron microscopy to the characterization of nanoparticles in the environment. Environmental Science & Technology 37(4): 786-791, February 15, 2003

Direct imaging of Guinier-Preston zones by high-angle annular detector dark-field scanning transmission electron microscopy. Journal of Electron Microscopy 50(2): 105-111, 2001

Imaging of high-angle annular dark-field scanning transmission electron microscopy and observations of GaN-based violet laser diodes. Journal of Microscopy 223(Pt 3): 172-178, 2006

Aberration Corrected High Angle Annular Dark Field (HAADF) Scanning Transmission Electron Microscopy (STEM) and In Situ Transmission Electron Microscopy (TEM) Study of Transition Metal Dichalcogenides (TMDs). Microscopy and Microanalysis 21(S3): 431-432, 2015

Annular Bright Field Scanning Transmission Electron Microscopy - Direct and Robust Atomic-Resolution Imaging of Light Elements in Crystalline Materials. Microscopy and Microanalysis 21(S3): 1939-1940, 2015

Frozen lattice and absorptive model for high angle annular dark field scanning transmission electron microscopy: A comparison study in terms of integrated intensity and atomic column position measurement. Ultramicroscopy 184(Pt A): 188-198, 2017

Unscrambling Mixed Elements using High Angle Annular Dark Field Scanning Transmission Electron Microscopy. Physical Review Letters 116(24): 246101-246101, 2016

Atomic-Resolution Scanning Transmission Electron Microscopy with Segmented Annular All Field Detector. Microscopy and Microanalysis 20(S3): 64-65, 2014

Comparison of phase contrast transmission electron microscopy with optimized scanning transmission annular dark field imaging for protein imaging. Ultramicroscopy 96(1): 117-124, 2003

Sub-nanometer Au monolayer-protected clusters exhibiting molecule-like electronic behavior: quantitative high-angle annular dark-field scanning transmission electron microscopy and electrochemical characterization of clusters with precise atomic stoichiometry. Journal of Physical Chemistry. B 110(26): 12874-12883, 2006

Quantitative Measurement of Volumes for Nanoparticles by High-Angle Annular Dark-Field Scanning Transmission Electron Microscopy. Microscopy and Microanalysis 16(S2): 1764-1765, 2010