Synergistic effects on thermal growth of CuO nanowires
Shi, Juan1; Qiao, Liang1,3; Zhao, Yi1; Sun, Zhonggui1; Feng, Wangjun2; Zhang, Zhiya1,4; Wang, Jun1,4; Men, Xuehu1

Growing cupric oxide (CuO) nanowires (NWs) through thermal oxidation of copper (Cu) in air is a facile and low-cost strategy. In a temperature range of 673-1073 K, single-crystal, bi-crystal NWs and cone-shaped nanostructure usually coexist. As far as the underlying mechanism is concerned, the stress-driven grain-boundary (GB) diffusion mechanism has been the most successful theory up to now. However, it did not include the influence of oxygen partial pressure and cannot explain the growth of long single-crystal CuO NWs of uniform diameters. Thus, the CuO NWs growth mechanism is yet to be fully understood. In this study, we present that synergistic effects of the Kirkendall effect, stress-driven GB diffusion, large surface free energy gap between Cu2O and CuO facets and an effective electric field along the CuO NWs originating from oxygen gradient are mainly involved in the thermal growth of CuO NWs. (C) 2019 Elsevier B.V. All rights reserved.

KeywordThermal oxidation of Cu in air CuO nanowires Kirkendall effect Surface free energy Surface polarization Oxygen gradient
Indexed BySCI ; EI
Funding ProjectNational Natural Science Foundation of China[51675252][51731001] ; Fundamental Research Funds for the Central Universities[lzujbky-2016-114][lzujbky-2018-kb06] ; Science Foundation of Gansu Province[17JR5RA200] ; Open Project of Key Laboratory for Magnetism Materials of the Ministry of Education (Lanzhou University)[LZUMMM2019009]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000502521900054
EI Accession Number20194007489397
EI Classification Number482.2 Minerals - 641.1 Thermodynamics - 701.1 Electricity: Basic Concepts and Phenomena - 761 Nanotechnology - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 933 Solid State Physics - 933.1 Crystalline Solids
Document Type期刊论文
Corresponding AuthorZhang, Zhiya; Wang, Jun
Affiliation1.Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Gansu, Peoples R China
2.Lanzhou Univ Technol, Sch Sci, Lanzhou 730000, Gansu, Peoples R China
3.Lanzhou Univ, Inst Appl Magnetism, Key Lab Magnetism & Magnet Mat, Minist Educ, Lanzhou 730000, Gansu, Peoples R China
4.Lanzhou Univ, Key Lab Special Funct Mat & Struct Design, Minist Educ, Lanzhou 730000, Gansu, Peoples R China
Recommended Citation
GB/T 7714
Shi, Juan,Qiao, Liang,Zhao, Yi,et al. Synergistic effects on thermal growth of CuO nanowires[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,815.
APA Shi, Juan.,Qiao, Liang.,Zhao, Yi.,Sun, Zhonggui.,Feng, Wangjun.,...&Men, Xuehu.(2020).Synergistic effects on thermal growth of CuO nanowires.JOURNAL OF ALLOYS AND COMPOUNDS,815.
MLA Shi, Juan,et al."Synergistic effects on thermal growth of CuO nanowires".JOURNAL OF ALLOYS AND COMPOUNDS 815(2020).
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