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Title: In situ transmission electron microscopy of cadmium selenide nanorod sublimation

Abstract

In situ electron microscopy is used to observe the morphological evolution of cadmium selenide nanorods as they sublime under vacuum at a series of elevated temperatures. Mass loss occurs anisotropically along the nanorod’s long axis. At temperatures close to the sublimation threshold, the phase change occurs from both tips of the nanorods and proceeds unevenly with periods of rapid mass loss punctuated by periods of relative stability. At higher temperatures, the nanorods sublime at a faster, more uniform rate, but mass loss occurs from only a single end of the rod. Furthermore, we propose a mechanism that accounts for the observed sublimation behavior based on the terrace–ledge–kink (TLK) model and how the nanorod surface chemical environment influences the kinetic barrier of sublimation.

Authors:
 [1];  [1];  [1];  [1]
  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Materials Sciences Division; USDOE
OSTI Identifier:
1342936
Report Number(s):
LBNL-1004437
Journal ID: ISSN 1948-7185; ir:1004437
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physical Chemistry Letters
Additional Journal Information:
Journal Volume: 6; Journal Issue: 4; Journal ID: ISSN 1948-7185
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; cadmium selenide; in situ TEM; nanorod; phase transition dynamics; sublimation

Citation Formats

Hellebusch, Daniel J., Manthiram, Karthish, Beberwyck, Brandon J., and Alivisatos, A. Paul. In situ transmission electron microscopy of cadmium selenide nanorod sublimation. United States: N. p., 2015. Web. doi:10.1021/jz502566m.
Hellebusch, Daniel J., Manthiram, Karthish, Beberwyck, Brandon J., & Alivisatos, A. Paul. In situ transmission electron microscopy of cadmium selenide nanorod sublimation. United States. doi:10.1021/jz502566m.
Hellebusch, Daniel J., Manthiram, Karthish, Beberwyck, Brandon J., and Alivisatos, A. Paul. Fri . "In situ transmission electron microscopy of cadmium selenide nanorod sublimation". United States. doi:10.1021/jz502566m. https://www.osti.gov/servlets/purl/1342936.
@article{osti_1342936,
title = {In situ transmission electron microscopy of cadmium selenide nanorod sublimation},
author = {Hellebusch, Daniel J. and Manthiram, Karthish and Beberwyck, Brandon J. and Alivisatos, A. Paul},
abstractNote = {In situ electron microscopy is used to observe the morphological evolution of cadmium selenide nanorods as they sublime under vacuum at a series of elevated temperatures. Mass loss occurs anisotropically along the nanorod’s long axis. At temperatures close to the sublimation threshold, the phase change occurs from both tips of the nanorods and proceeds unevenly with periods of rapid mass loss punctuated by periods of relative stability. At higher temperatures, the nanorods sublime at a faster, more uniform rate, but mass loss occurs from only a single end of the rod. Furthermore, we propose a mechanism that accounts for the observed sublimation behavior based on the terrace–ledge–kink (TLK) model and how the nanorod surface chemical environment influences the kinetic barrier of sublimation.},
doi = {10.1021/jz502566m},
journal = {Journal of Physical Chemistry Letters},
number = 4,
volume = 6,
place = {United States},
year = {2015},
month = {1}
}

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