Anisotropic surface strain in single crystalline cobalt nanowires and its impact on the diameter-dependent Young's modulus

Handle URI:
http://hdl.handle.net/10754/562545
Title:
Anisotropic surface strain in single crystalline cobalt nanowires and its impact on the diameter-dependent Young's modulus
Authors:
Huang, Xiaohu; Li, Guanghai; Kong, Lingbing; Huang, Yizhong; Wu, Tao ( 0000-0003-0845-4827 )
Abstract:
Understanding and measuring the size-dependent surface strain of nanowires are essential to their applications in various emerging devices. Here, we report on the diameter-dependent surface strain and Young's modulus of single-crystalline Co nanowires investigated by in situ X-ray diffraction measurements. Diameter-dependent initial longitudinal elongation of the nanowires is observed and ascribed to the anisotropic surface stress due to the Poisson effect, which serves as the basis for mechanical measurements. As the nanowire diameter decreases, a transition from the "smaller is softer" regime to the "smaller is tougher" regime is observed in the Young's modulus of the nanowires, which is attributed to the competition between the elongation softening and the surface stiffening effects. Our work demonstrates a new nondestructive method capable of measuring the initial surface strain and estimating the Young's modulus of single crystalline nanowires, and provides new insights on the size effect. © 2013 The Royal Society of Chemistry.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Solar and Photovoltaic Engineering Research Center (SPERC); Laboratory of Nano Oxides for Sustainable Energy
Publisher:
Royal Society of Chemistry
Journal:
Nanoscale
Issue Date:
2013
DOI:
10.1039/c3nr81284g
Type:
Article
ISSN:
20403364
Sponsors:
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (Grant no. 11174285), the Innovation Centre of Singapore-MIT Alliance for Research and Technology (Grant no. ING12050-ENG(IGN)) and Singapore Ministry of Education (Grant no. RG44/12).
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorHuang, Xiaohuen
dc.contributor.authorLi, Guanghaien
dc.contributor.authorKong, Lingbingen
dc.contributor.authorHuang, Yizhongen
dc.contributor.authorWu, Taoen
dc.date.accessioned2015-08-03T10:42:06Zen
dc.date.available2015-08-03T10:42:06Zen
dc.date.issued2013en
dc.identifier.issn20403364en
dc.identifier.doi10.1039/c3nr81284gen
dc.identifier.urihttp://hdl.handle.net/10754/562545en
dc.description.abstractUnderstanding and measuring the size-dependent surface strain of nanowires are essential to their applications in various emerging devices. Here, we report on the diameter-dependent surface strain and Young's modulus of single-crystalline Co nanowires investigated by in situ X-ray diffraction measurements. Diameter-dependent initial longitudinal elongation of the nanowires is observed and ascribed to the anisotropic surface stress due to the Poisson effect, which serves as the basis for mechanical measurements. As the nanowire diameter decreases, a transition from the "smaller is softer" regime to the "smaller is tougher" regime is observed in the Young's modulus of the nanowires, which is attributed to the competition between the elongation softening and the surface stiffening effects. Our work demonstrates a new nondestructive method capable of measuring the initial surface strain and estimating the Young's modulus of single crystalline nanowires, and provides new insights on the size effect. © 2013 The Royal Society of Chemistry.en
dc.description.sponsorshipThe authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (Grant no. 11174285), the Innovation Centre of Singapore-MIT Alliance for Research and Technology (Grant no. ING12050-ENG(IGN)) and Singapore Ministry of Education (Grant no. RG44/12).en
dc.publisherRoyal Society of Chemistryen
dc.titleAnisotropic surface strain in single crystalline cobalt nanowires and its impact on the diameter-dependent Young's modulusen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.contributor.departmentLaboratory of Nano Oxides for Sustainable Energyen
dc.identifier.journalNanoscaleen
dc.contributor.institutionKey Laboratory of Material Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Chinaen
dc.contributor.institutionSchool of Materials Science and Engineering, Nanyang Technological University, Singapore, Singaporeen
kaust.authorWu, Taoen
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