Superhard silicon nanospheres

W. W. Gerberich; W. M. Mook; C. R. Perrey; C. B. Carter; M. I. Baskes; R. Mukherjee; A. Gidwani; J. Heberlein; P. H. McMurry; S. L. Girshick

doi:10.1016/S0022-5096(03)00018-8

Superhard silicon nanospheres

W. W. Gerberich, W. M. Mook, C. R. Perrey, C. B. Carter, M. I. Baskes, R. Mukherjee, A. Gidwani, J. Heberlein, P. H. McMurry, S. L. Girshick

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218 Scopus citations

Abstract

Successful deposition and mechanical probing of nearly spherical, defect-free silicon nanospheres has been accomplished. The results show silicon at this length scale to be up to four times harder than bulk silicon. Detailed measurements of plasticity evolution and the corresponding hardening response in normally brittle silicon is possible in these small volumes. Based upon a proposed length scale related to the size of nanospheres in the 20-50 nm radii range, a prediction of observed hardnesses in the range of 20-50 GPa is made. The ramifications of this to computational materials science studies on identical volumes are discussed.

Original language	English (US)
Pages (from-to)	979-992
Number of pages	14
Journal	Journal of the Mechanics and Physics of Solids
Volume	51
Issue number	6
DOIs	https://doi.org/10.1016/S0022-5096(03)00018-8
State	Published - Jun 2003

Bibliographical note

Funding Information:
This work was supported by the National Science Foundation under grant DMI-0103169 and an NSF-IGERT program through grant DGE-0114372 and the USDOE Office of Science.

Keywords

A. Dislocations
A. Indentation and hardness
A. Strengthening and mechanisms

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title = "Superhard silicon nanospheres",

abstract = "Successful deposition and mechanical probing of nearly spherical, defect-free silicon nanospheres has been accomplished. The results show silicon at this length scale to be up to four times harder than bulk silicon. Detailed measurements of plasticity evolution and the corresponding hardening response in normally brittle silicon is possible in these small volumes. Based upon a proposed length scale related to the size of nanospheres in the 20-50 nm radii range, a prediction of observed hardnesses in the range of 20-50 GPa is made. The ramifications of this to computational materials science studies on identical volumes are discussed.",

keywords = "A. Dislocations, A. Indentation and hardness, A. Strengthening and mechanisms",

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note = "Funding Information: This work was supported by the National Science Foundation under grant DMI-0103169 and an NSF-IGERT program through grant DGE-0114372 and the USDOE Office of Science.",

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AU - Gerberich, W. W.

AU - Mook, W. M.

AU - Perrey, C. R.

AU - Carter, C. B.

AU - Baskes, M. I.

AU - Mukherjee, R.

AU - Gidwani, A.

AU - Heberlein, J.

AU - McMurry, P. H.

AU - Girshick, S. L.

N1 - Funding Information: This work was supported by the National Science Foundation under grant DMI-0103169 and an NSF-IGERT program through grant DGE-0114372 and the USDOE Office of Science.

PY - 2003/6

Y1 - 2003/6

N2 - Successful deposition and mechanical probing of nearly spherical, defect-free silicon nanospheres has been accomplished. The results show silicon at this length scale to be up to four times harder than bulk silicon. Detailed measurements of plasticity evolution and the corresponding hardening response in normally brittle silicon is possible in these small volumes. Based upon a proposed length scale related to the size of nanospheres in the 20-50 nm radii range, a prediction of observed hardnesses in the range of 20-50 GPa is made. The ramifications of this to computational materials science studies on identical volumes are discussed.

AB - Successful deposition and mechanical probing of nearly spherical, defect-free silicon nanospheres has been accomplished. The results show silicon at this length scale to be up to four times harder than bulk silicon. Detailed measurements of plasticity evolution and the corresponding hardening response in normally brittle silicon is possible in these small volumes. Based upon a proposed length scale related to the size of nanospheres in the 20-50 nm radii range, a prediction of observed hardnesses in the range of 20-50 GPa is made. The ramifications of this to computational materials science studies on identical volumes are discussed.

KW - A. Dislocations

KW - A. Indentation and hardness

KW - A. Strengthening and mechanisms

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JO - Journal of the Mechanics and Physics of Solids

JF - Journal of the Mechanics and Physics of Solids

IS - 6

ER -

Superhard silicon nanospheres

Abstract

Bibliographical note

Keywords

Access

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