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Title: In-situ Study of Nanostructure and Electrical Resistance of Nanocluster Films Irradiated with Ion Beams

Abstract

An in-situ study is reported on the structural evolution in nanocluster films under He+ ion irradiation using an advanced helium ion microscope. The films consist of loosely interconnected nanoclusters of magnetite or iron-magnetite (Fe-Fe3O4) core-shells. The nanostructure is observed to undergo dramatic changes under ion-beam irradiation, featuring grain growth, phase transition, particle aggregation, and formation of nanowire-like network and nano-pores. Studies based on ion irradiation, thermal annealing and election irradiation have indicated that the major structural evolution is activated by elastic nuclear collisions, while both electronic and thermal processes can play a significant role once the evolution starts. The electrical resistance of the Fe-Fe3O4 films measured in situ exhibits a super-exponential decay with dose. The behavior suggests that the nanocluster films possess an intrinsic merit for development of an advanced online monitor for neutron radiation with both high detection sensitivity and long-term applicability, which can enhance safety measures in many nuclear operations.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1170465
Report Number(s):
PNNL-SA-100694
44713
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Advanced Functional Materials, 24(39):6210-6218
Country of Publication:
United States
Language:
English
Subject:
In-situ study, nanostructure, electrical resistance, nanocluster film, ion-beam irradiation, HIM; Environmental Molecular Sciences Laboratory

Citation Formats

Jiang, Weilin, Sundararajan, Jennifer A., Varga, Tamas, Bowden, Mark E., Qiang, You, McCloy, John S., Henager, Charles H., and Montgomery, Robert O. In-situ Study of Nanostructure and Electrical Resistance of Nanocluster Films Irradiated with Ion Beams. United States: N. p., 2014. Web. doi:10.1002/adfm.201400553.
Jiang, Weilin, Sundararajan, Jennifer A., Varga, Tamas, Bowden, Mark E., Qiang, You, McCloy, John S., Henager, Charles H., & Montgomery, Robert O. In-situ Study of Nanostructure and Electrical Resistance of Nanocluster Films Irradiated with Ion Beams. United States. doi:10.1002/adfm.201400553.
Jiang, Weilin, Sundararajan, Jennifer A., Varga, Tamas, Bowden, Mark E., Qiang, You, McCloy, John S., Henager, Charles H., and Montgomery, Robert O. Mon . "In-situ Study of Nanostructure and Electrical Resistance of Nanocluster Films Irradiated with Ion Beams". United States. doi:10.1002/adfm.201400553.
@article{osti_1170465,
title = {In-situ Study of Nanostructure and Electrical Resistance of Nanocluster Films Irradiated with Ion Beams},
author = {Jiang, Weilin and Sundararajan, Jennifer A. and Varga, Tamas and Bowden, Mark E. and Qiang, You and McCloy, John S. and Henager, Charles H. and Montgomery, Robert O.},
abstractNote = {An in-situ study is reported on the structural evolution in nanocluster films under He+ ion irradiation using an advanced helium ion microscope. The films consist of loosely interconnected nanoclusters of magnetite or iron-magnetite (Fe-Fe3O4) core-shells. The nanostructure is observed to undergo dramatic changes under ion-beam irradiation, featuring grain growth, phase transition, particle aggregation, and formation of nanowire-like network and nano-pores. Studies based on ion irradiation, thermal annealing and election irradiation have indicated that the major structural evolution is activated by elastic nuclear collisions, while both electronic and thermal processes can play a significant role once the evolution starts. The electrical resistance of the Fe-Fe3O4 films measured in situ exhibits a super-exponential decay with dose. The behavior suggests that the nanocluster films possess an intrinsic merit for development of an advanced online monitor for neutron radiation with both high detection sensitivity and long-term applicability, which can enhance safety measures in many nuclear operations.},
doi = {10.1002/adfm.201400553},
journal = {Advanced Functional Materials, 24(39):6210-6218},
number = ,
volume = ,
place = {United States},
year = {Mon Aug 11 00:00:00 EDT 2014},
month = {Mon Aug 11 00:00:00 EDT 2014}
}