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Title: In situ observation of the formation of hollow zinc oxide shells

Single crystal zinc particles, 1–2 μm1–2 μm in diameter, were observed in situ with transmission electron microscopy during sublimation. The rate of sublimation is strongly dependent on the presence of a surface oxide layer. Near 375°, minimally oxidized Zn surfaces sublime in tens of seconds, consistent with a model in which the particle behaves similarly to an isolated microscale effusion cell. By contrast, zinc particles fully enclosed by oxide sublime less than one-tenth as quickly. Here these results provide new insight into the synthesis mechanisms of hollow ZnO microspheres and related structures formed from metallic zinc at elevated temperatures.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Epimedia, Inc., Walnut Creek, CA (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-418838
Journal ID: ISSN 0003-6951; APPLAB
Grant/Contract Number:
AC52-07NA27344
Type:
Published Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 98; Journal Issue: 24; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1114983
Alternate Identifier(s):
OSTI ID: 1376042