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Dissociative chemisorption of O2 inducing stress corrosion cracking in silicon crystals
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Gleizer, Anna, Peralta, Giovanni, Kermode, James R., De Vita, Alessandro and Sherman, Dov (2014) Dissociative chemisorption of O2 inducing stress corrosion cracking in silicon crystals. Physical Review Letters, Volume 112 (Number 11). Article number 115501. doi:10.1103/PhysRevLett.112.115501 ISSN 0031-9007.
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Official URL: http://dx.doi.orG/10.1103/PhysRevLett.112.115501
Abstract
Fracture experiments to evaluate the cleavage energy of the (110)[1-10] and (111)[11-2] cleavage systems in silicon at room temperature and humidity give 2.7 +/- 0.3 and 2.2 +/-0.2 J/m^2, respectively, lower than any previous measurement and inconsistent with density functional theory (DFT) surface energy calculations of 3.46 and 2.88 J/m^2. However, in an inert gas environment, we measure values of 3.5 +/- 0.2 and 2.9 +/- 0.2 J/m^2, consistent with DFT, that suggest a previously undetected stress corrosion cracking scenario for Si crack initiation in room conditions. This is fully confirmed by hybrid quantum-mechanics–molecular-mechanics calculations.
Item Type: | Journal Article | ||||||
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Subjects: | Q Science > QC Physics | ||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
Library of Congress Subject Headings (LCSH): | Silicon crystals -- Stress corrosion, Chemisorption | ||||||
Journal or Publication Title: | Physical Review Letters | ||||||
Publisher: | American Physical Society | ||||||
ISSN: | 0031-9007 | ||||||
Official Date: | 18 March 2014 | ||||||
Dates: |
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Volume: | Volume 112 | ||||||
Number: | Number 11 | ||||||
Article Number: | Article number 115501 | ||||||
DOI: | 10.1103/PhysRevLett.112.115501 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||
Date of first compliant deposit: | 28 December 2015 | ||||||
Date of first compliant Open Access: | 28 December 2015 | ||||||
Funder: | Imperial College, London. Rio Tinto Centre for Advanced Mineral Recovery, Engineering and Physical Sciences Research Council (EPSRC), Seventh Framework Programme (European Commission) (FP7), United States. Department of Energy | ||||||
Grant number: | EP/L014742/1 (EPSRC), DE-AC02-06CH11357 (DoE) |
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