Point defect configurations of supersaturated Au atoms inside Si nanowires

Sang Ho Oh; Klaus Van Benthem; Sergio I. Molina; Albina Y. Borisevich; Weidong Luo; Peter Werner; Nikolai D. Zakharov; Dhananjay Kumar; Sokrates T. Pantelides; Stephen J. Pennycook

doi:10.1021/nl072670+

Point defect configurations of supersaturated Au atoms inside Si nanowires

Sang Ho Oh, Klaus Van Benthem, Sergio I. Molina, Albina Y. Borisevich, Weidong Luo, Peter Werner, Nikolai D. Zakharov, Dhananjay Kumar, Sokrates T. Pantelides, Stephen J. Pennycook

Research output: Contribution to journal › Article › peer-review

113 Scopus citations

Abstract

Aberration-corrected scanning transmission electron microscopy (STEM) is used to reveal individual Au atom configurations inside Si nanowires grown by Au-catalyzed vapor-liquid-solid (VLS) molecular beam epitaxy (MBE). We identify a substitutional and three distinct interstitial configurations, one of which has not been previously identified. We confirm the stability of the observed point defect configurations by density functional theory (DFT) calculations. The observed number densities of the various configurations are in accord with their calculated formation energies. The concentration of Au atoms is larger than the solubility limit, but the effect may be caused by the STEM beam.

Original language	English
Pages (from-to)	1016-1019
Number of pages	4
Journal	Nano Letters
Volume	8
Issue number	4
DOIs	https://doi.org/10.1021/nl072670+
State	Published - Apr 2008

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title = "Point defect configurations of supersaturated Au atoms inside Si nanowires",

abstract = "Aberration-corrected scanning transmission electron microscopy (STEM) is used to reveal individual Au atom configurations inside Si nanowires grown by Au-catalyzed vapor-liquid-solid (VLS) molecular beam epitaxy (MBE). We identify a substitutional and three distinct interstitial configurations, one of which has not been previously identified. We confirm the stability of the observed point defect configurations by density functional theory (DFT) calculations. The observed number densities of the various configurations are in accord with their calculated formation energies. The concentration of Au atoms is larger than the solubility limit, but the effect may be caused by the STEM beam.",

author = "Oh, {Sang Ho} and {Van Benthem}, Klaus and Molina, {Sergio I.} and Borisevich, {Albina Y.} and Weidong Luo and Peter Werner and Zakharov, {Nikolai D.} and Dhananjay Kumar and Pantelides, {Sokrates T.} and Pennycook, {Stephen J.}",

year = "2008",

month = apr,

doi = "10.1021/nl072670+",

language = "English",

volume = "8",

pages = "1016--1019",

journal = "Nano Letters",

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T1 - Point defect configurations of supersaturated Au atoms inside Si nanowires

AU - Oh, Sang Ho

AU - Van Benthem, Klaus

AU - Molina, Sergio I.

AU - Borisevich, Albina Y.

AU - Luo, Weidong

AU - Werner, Peter

AU - Zakharov, Nikolai D.

AU - Kumar, Dhananjay

AU - Pantelides, Sokrates T.

AU - Pennycook, Stephen J.

PY - 2008/4

Y1 - 2008/4

N2 - Aberration-corrected scanning transmission electron microscopy (STEM) is used to reveal individual Au atom configurations inside Si nanowires grown by Au-catalyzed vapor-liquid-solid (VLS) molecular beam epitaxy (MBE). We identify a substitutional and three distinct interstitial configurations, one of which has not been previously identified. We confirm the stability of the observed point defect configurations by density functional theory (DFT) calculations. The observed number densities of the various configurations are in accord with their calculated formation energies. The concentration of Au atoms is larger than the solubility limit, but the effect may be caused by the STEM beam.

AB - Aberration-corrected scanning transmission electron microscopy (STEM) is used to reveal individual Au atom configurations inside Si nanowires grown by Au-catalyzed vapor-liquid-solid (VLS) molecular beam epitaxy (MBE). We identify a substitutional and three distinct interstitial configurations, one of which has not been previously identified. We confirm the stability of the observed point defect configurations by density functional theory (DFT) calculations. The observed number densities of the various configurations are in accord with their calculated formation energies. The concentration of Au atoms is larger than the solubility limit, but the effect may be caused by the STEM beam.

UR - http://www.scopus.com/inward/record.url?scp=46649108933&partnerID=8YFLogxK

U2 - 10.1021/nl072670+

DO - 10.1021/nl072670+

M3 - Article

AN - SCOPUS:46649108933

SN - 1530-6984

VL - 8

SP - 1016

EP - 1019

JO - Nano Letters

JF - Nano Letters

IS - 4

ER -

Point defect configurations of supersaturated Au atoms inside Si nanowires

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