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Facet-dependent electrical and mechanical properties of polyhedral Cu2O under compression
Li, SJ; Liu, CL; Ou, TJ; Wang, TY; Dong, Q; Wang, J; Cheng, H; Sui, YM; Ma, YZ; Han, YH; Gao, CX; Cheng H(程虎)
2018
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
EISSN1873-4669
Volume762Pages:835-841
SubtypeArticle
AbstractIn this paper, both the facet-dependent electrical properties and mechanical stability of submicron-sized polyhedral Cu2O are investigated with in-situ resistivity measurements with pressure up to 25.0 GPa. The pressure-induced morphology changes are characterized by scanning/transmission electron microscopy. X-ray photoelectron spectroscopy measurements are also adopted to rationalize the diversity of the electrical resistivity of polyhedral Cu2O under compression. The electrical properties of cubic, truncated octahedral, and octahedral Cu2O show extremely different pressure dependence, which can be attributed to the preferential adsorption of oxygen on Cu2O (111) facet. The anomalous changes in electrical resistivity at 0.7-2.2, 8.5,10.3, and 21.6 GPa are due to pressure-induced structural phase transitions of the Cu2O crystals. The dramatic reductions of resistivity in cubes and octahedras at 15.0 GPa and of truncated octahedras at 21.2 GPa are driven by pressure-induced crush and nanocrystallization of Cu2O crystals. The mechanical stability of truncated octahedral Cu2O is better than those of both cubic and octahedral Cu2O. Our results not only elucidate the underlying mechanisms for understanding the two previously reported pressure-dependent electrical resistance change trends difference, but also give a reasonably explanation of the facet-dependent mechanical property of Cu2O. (C) 2018 Elsevier B.V. All rights reserved.
KeywordFacet-dependent Cuprous oxide Electrical properties Mechanical stability High pressure
DOI10.1016/j.jallcom.2018.05.215
WOS KeywordCOMPARATIVE PHOTOCATALYTIC ACTIVITY ; HIGH-PRESSURE ; COPPER OXIDES ; CRYSTALS ; HETEROJUNCTION ; NANOCRYSTALS ; TEMPERATURE ; MORPHOLOGY ; REDUCTION ; EVOLUTION
Indexed BySCI ; EI
Language英语
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000436600000097
EI Accession Number20182205262774
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Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/286070
Collection多学科研究中心
实验物理中心
中国科学院高能物理研究所_中国散裂中子源
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Li, SJ,Liu, CL,Ou, TJ,et al. Facet-dependent electrical and mechanical properties of polyhedral Cu2O under compression[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,762:835-841.
APA Li, SJ.,Liu, CL.,Ou, TJ.,Wang, TY.,Dong, Q.,...&程虎.(2018).Facet-dependent electrical and mechanical properties of polyhedral Cu2O under compression.JOURNAL OF ALLOYS AND COMPOUNDS,762,835-841.
MLA Li, SJ,et al."Facet-dependent electrical and mechanical properties of polyhedral Cu2O under compression".JOURNAL OF ALLOYS AND COMPOUNDS 762(2018):835-841.
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