Structure and spatial distribution of Ge nanocrystals subjected to fast neutron irradiation

Shai Levy; Issai Shlimak; David H. Dressler; Judith Grinblat; Yossi Gofer; Tiecheng Lu; Alexander N. Ionov

doi:10.5772/50951

Structure and spatial distribution of Ge nanocrystals subjected to fast neutron irradiation

Shai Levy, Issai Shlimak, David H. Dressler, Judith Grinblat, Yossi Gofer, Tiecheng Lu, Alexander N. Ionov

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

6 Scopus citations

Abstract

The influence of fast neutron irradiation on the structure and spatial distribution of Ge nanocrystals (NC) embedded in an amorphous SiO₂ matrix has been studied. The investigation was conducted by means of laser Raman Scattering (RS), High Resolution Transmission Electron Microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS). The irradiation of Ge- NC samples by a high dose of fast neutrons lead to a partial destruction of the nanocrystals. Full reconstruction of crystallinity was achieved after annealing the radiation damage at 8000C, which resulted in full restoration of the RS spectrum. HR-TEM images show, however, that the spatial distributions of Ge-NC changed as a result of irradiation and annealing. A sharp decrease in NC distribution towards the SiO₂ surface has been observed. This was accompanied by XPS detection of Ge oxides and elemental Ge within both the surface and subsurface region.

Original language	English
Pages (from-to)	52-57
Number of pages	6
Journal	Nanomaterials and Nanotechnology
Volume	1
Issue number	1
DOIs	https://doi.org/10.5772/50951
State	Published - 2011

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China under contract No.60933013, National High Technology Research and Development Program of China (863) under contract No.2010ZX03004-003, the Fundamental Research Funds for the Central Universities, and the Science Research Fund of University of Science and Technology of China for Young Scholars.

Funding

This work was supported by the National Natural Science Foundation of China under contract No.60933013, National High Technology Research and Development Program of China (863) under contract No.2010ZX03004-003, the Fundamental Research Funds for the Central Universities, and the Science Research Fund of University of Science and Technology of China for Young Scholars.

Funders	Funder number
National High Technology Research and Development Program of China (863)	No.2010ZX03004-003
National Natural Science Foundation of China	60933013
University of Science and Technology of China
Fundamental Research Funds for the Central Universities

Keywords

Ge nanocrystals
Neutron radiation effects
Structure and spatial distribution

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10.5772/50951

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title = "Structure and spatial distribution of Ge nanocrystals subjected to fast neutron irradiation",

abstract = "The influence of fast neutron irradiation on the structure and spatial distribution of Ge nanocrystals (NC) embedded in an amorphous SiO2 matrix has been studied. The investigation was conducted by means of laser Raman Scattering (RS), High Resolution Transmission Electron Microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS). The irradiation of Ge- NC samples by a high dose of fast neutrons lead to a partial destruction of the nanocrystals. Full reconstruction of crystallinity was achieved after annealing the radiation damage at 8000C, which resulted in full restoration of the RS spectrum. HR-TEM images show, however, that the spatial distributions of Ge-NC changed as a result of irradiation and annealing. A sharp decrease in NC distribution towards the SiO2 surface has been observed. This was accompanied by XPS detection of Ge oxides and elemental Ge within both the surface and subsurface region.",

keywords = "Ge nanocrystals, Neutron radiation effects, Structure and spatial distribution",

author = "Shai Levy and Issai Shlimak and Dressler, {David H.} and Judith Grinblat and Yossi Gofer and Tiecheng Lu and Ionov, {Alexander N.}",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China under contract No.60933013, National High Technology Research and Development Program of China (863) under contract No.2010ZX03004-003, the Fundamental Research Funds for the Central Universities, and the Science Research Fund of University of Science and Technology of China for Young Scholars.",

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AU - Levy, Shai

AU - Shlimak, Issai

AU - Dressler, David H.

AU - Grinblat, Judith

AU - Gofer, Yossi

AU - Lu, Tiecheng

AU - Ionov, Alexander N.

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China under contract No.60933013, National High Technology Research and Development Program of China (863) under contract No.2010ZX03004-003, the Fundamental Research Funds for the Central Universities, and the Science Research Fund of University of Science and Technology of China for Young Scholars.

PY - 2011

Y1 - 2011

N2 - The influence of fast neutron irradiation on the structure and spatial distribution of Ge nanocrystals (NC) embedded in an amorphous SiO2 matrix has been studied. The investigation was conducted by means of laser Raman Scattering (RS), High Resolution Transmission Electron Microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS). The irradiation of Ge- NC samples by a high dose of fast neutrons lead to a partial destruction of the nanocrystals. Full reconstruction of crystallinity was achieved after annealing the radiation damage at 8000C, which resulted in full restoration of the RS spectrum. HR-TEM images show, however, that the spatial distributions of Ge-NC changed as a result of irradiation and annealing. A sharp decrease in NC distribution towards the SiO2 surface has been observed. This was accompanied by XPS detection of Ge oxides and elemental Ge within both the surface and subsurface region.

AB - The influence of fast neutron irradiation on the structure and spatial distribution of Ge nanocrystals (NC) embedded in an amorphous SiO2 matrix has been studied. The investigation was conducted by means of laser Raman Scattering (RS), High Resolution Transmission Electron Microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS). The irradiation of Ge- NC samples by a high dose of fast neutrons lead to a partial destruction of the nanocrystals. Full reconstruction of crystallinity was achieved after annealing the radiation damage at 8000C, which resulted in full restoration of the RS spectrum. HR-TEM images show, however, that the spatial distributions of Ge-NC changed as a result of irradiation and annealing. A sharp decrease in NC distribution towards the SiO2 surface has been observed. This was accompanied by XPS detection of Ge oxides and elemental Ge within both the surface and subsurface region.

KW - Ge nanocrystals

KW - Neutron radiation effects

KW - Structure and spatial distribution

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Structure and spatial distribution of Ge nanocrystals subjected to fast neutron irradiation

Abstract

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