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Title: A Second Amorphous Layer Underneath Surface Oxide

Abstract

Abstract Formation of a nanometer-scale oxide surface layer is common when a material is exposed to oxygen-containing environment. Employing aberration-corrected analytical transmission electron microscopy and using single crystal SnSe as an example, we show that for an alloy, a second thin amorphous layer can appear underneath the outmost oxide layer. This inner amorphous layer is not oxide based, but instead originates from solid-state amorphization of the base alloy when its free energy rises to above that of the metastable amorphous state; which is a result of the composition shift due to the preferential depletion of the oxidizing species, in our case, the outgoing Sn reacting with the oxygen atmosphere.

Authors:
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Publication Date:
Research Org.:
Johns Hopkins Univ., Baltimore, MD (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1532890
DOE Contract Number:  
FG02-03ER46056
Resource Type:
Journal Article
Journal Name:
Microscopy and Microanalysis
Additional Journal Information:
Journal Volume: 23; Journal Issue: 1; Journal ID: ISSN 1431-9276
Publisher:
Microscopy Society of America (MSA)
Country of Publication:
United States
Language:
English
Subject:
Materials Science; Microscopy

Citation Formats

Zhang, Bin, Peng, Kunlin, Sha, Xuechao, Li, Ang, Zhou, Xiaoyuan, Chen, Yanhui, Deng, QingSong, Yang, Dingfeng, Ma, Evan, and Han, Xiaodong. A Second Amorphous Layer Underneath Surface Oxide. United States: N. p., 2017. Web. doi:10.1017/s143192761700006x.
Zhang, Bin, Peng, Kunlin, Sha, Xuechao, Li, Ang, Zhou, Xiaoyuan, Chen, Yanhui, Deng, QingSong, Yang, Dingfeng, Ma, Evan, & Han, Xiaodong. A Second Amorphous Layer Underneath Surface Oxide. United States. doi:10.1017/s143192761700006x.
Zhang, Bin, Peng, Kunlin, Sha, Xuechao, Li, Ang, Zhou, Xiaoyuan, Chen, Yanhui, Deng, QingSong, Yang, Dingfeng, Ma, Evan, and Han, Xiaodong. Wed . "A Second Amorphous Layer Underneath Surface Oxide". United States. doi:10.1017/s143192761700006x.
@article{osti_1532890,
title = {A Second Amorphous Layer Underneath Surface Oxide},
author = {Zhang, Bin and Peng, Kunlin and Sha, Xuechao and Li, Ang and Zhou, Xiaoyuan and Chen, Yanhui and Deng, QingSong and Yang, Dingfeng and Ma, Evan and Han, Xiaodong},
abstractNote = {Abstract Formation of a nanometer-scale oxide surface layer is common when a material is exposed to oxygen-containing environment. Employing aberration-corrected analytical transmission electron microscopy and using single crystal SnSe as an example, we show that for an alloy, a second thin amorphous layer can appear underneath the outmost oxide layer. This inner amorphous layer is not oxide based, but instead originates from solid-state amorphization of the base alloy when its free energy rises to above that of the metastable amorphous state; which is a result of the composition shift due to the preferential depletion of the oxidizing species, in our case, the outgoing Sn reacting with the oxygen atmosphere.},
doi = {10.1017/s143192761700006x},
journal = {Microscopy and Microanalysis},
issn = {1431-9276},
number = 1,
volume = 23,
place = {United States},
year = {2017},
month = {2}
}