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Title: Four-Dimensional Imaging of ZnO-Coated Alumina Aerogels by Scanning Transmission X-ray Microscopy and Ptychographic Tomography

Abstract

Functional porous materials are of mounting significance in energy conversion and catalysis. Improved analysis is needed to guide optimization. Four-dimensional (4D) imaging [chemical mapping in three-dimensional (3D) by spectro-tomography] of an Al 2O 3 aerogel coated with ZnO by atomic layer deposition was performed using soft X-ray ptychography at the Zn L-edge. A two-dimensional spatial resolution of 14(2) nm was achieved. Visualizations of the 3D chemical structure are provided. The degree of ZnO coverage of the surface of the Al 2O 3 aerogel framework in two different samples was estimated and found to be both thicker and less homogeneous than expected. Other analyses of the 4D results, including the degree of contact between Al 2O 3 and ZnO, were extracted from the reconstructed 3D data. This pioneering soft X-ray spectro-ptycho-tomography research will anchor further studies of functional porous materials.

Authors:
 [1];  [1];  [2];  [3];  [3];  [3];  [3];  [3];  [3]; ORCiD logo [1]
  1. McMaster Univ., Hamilton, ON (Canada)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; Natural Sciences and Engineering Research Council of Canada (NSERC); Canadian Institutes of Health Research
OSTI Identifier:
1544493
Report Number(s):
LLNL-JRNL-748333
Journal ID: ISSN 1932-7447; 932915
Grant/Contract Number:  
AC52-07NA27344; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physical Chemistry. C
Additional Journal Information:
Journal Volume: 122; Journal Issue: 44; Journal ID: ISSN 1932-7447
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE

Citation Formats

Wu, Juan, Zhu, Xiaohui, Shapiro, David A., Lee, Jonathan R. I., Van Buuren, Tony, Biener, Monika M., Gammon, Stuart A., Li, Tian T., Baumann, Theodore F., and Hitchcock, Adam P. Four-Dimensional Imaging of ZnO-Coated Alumina Aerogels by Scanning Transmission X-ray Microscopy and Ptychographic Tomography. United States: N. p., 2018. Web. doi:10.1021/acs.jpcc.8b07363.
Wu, Juan, Zhu, Xiaohui, Shapiro, David A., Lee, Jonathan R. I., Van Buuren, Tony, Biener, Monika M., Gammon, Stuart A., Li, Tian T., Baumann, Theodore F., & Hitchcock, Adam P. Four-Dimensional Imaging of ZnO-Coated Alumina Aerogels by Scanning Transmission X-ray Microscopy and Ptychographic Tomography. United States. doi:10.1021/acs.jpcc.8b07363.
Wu, Juan, Zhu, Xiaohui, Shapiro, David A., Lee, Jonathan R. I., Van Buuren, Tony, Biener, Monika M., Gammon, Stuart A., Li, Tian T., Baumann, Theodore F., and Hitchcock, Adam P. Tue . "Four-Dimensional Imaging of ZnO-Coated Alumina Aerogels by Scanning Transmission X-ray Microscopy and Ptychographic Tomography". United States. doi:10.1021/acs.jpcc.8b07363. https://www.osti.gov/servlets/purl/1544493.
@article{osti_1544493,
title = {Four-Dimensional Imaging of ZnO-Coated Alumina Aerogels by Scanning Transmission X-ray Microscopy and Ptychographic Tomography},
author = {Wu, Juan and Zhu, Xiaohui and Shapiro, David A. and Lee, Jonathan R. I. and Van Buuren, Tony and Biener, Monika M. and Gammon, Stuart A. and Li, Tian T. and Baumann, Theodore F. and Hitchcock, Adam P.},
abstractNote = {Functional porous materials are of mounting significance in energy conversion and catalysis. Improved analysis is needed to guide optimization. Four-dimensional (4D) imaging [chemical mapping in three-dimensional (3D) by spectro-tomography] of an Al2O3 aerogel coated with ZnO by atomic layer deposition was performed using soft X-ray ptychography at the Zn L-edge. A two-dimensional spatial resolution of 14(2) nm was achieved. Visualizations of the 3D chemical structure are provided. The degree of ZnO coverage of the surface of the Al2O3 aerogel framework in two different samples was estimated and found to be both thicker and less homogeneous than expected. Other analyses of the 4D results, including the degree of contact between Al2O3 and ZnO, were extracted from the reconstructed 3D data. This pioneering soft X-ray spectro-ptycho-tomography research will anchor further studies of functional porous materials.},
doi = {10.1021/acs.jpcc.8b07363},
journal = {Journal of Physical Chemistry. C},
number = 44,
volume = 122,
place = {United States},
year = {2018},
month = {10}
}

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