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dc.contributor.authorWu, Z. Y.en_US
dc.contributor.authorChen, I. J.en_US
dc.contributor.authorLin, Y. F.en_US
dc.contributor.authorChiu, S. P.en_US
dc.contributor.authorChen, F. R.en_US
dc.contributor.authorKai, J. J.en_US
dc.contributor.authorLin, J. J.en_US
dc.contributor.authorJian, W. B.en_US
dc.date.accessioned2014-12-08T15:12:28Z-
dc.date.available2014-12-08T15:12:28Z-
dc.date.issued2008-03-12en_US
dc.identifier.issn1367-2630en_US
dc.identifier.urihttp://dx.doi.org/10.1088/1367-2630/10/3/033017en_US
dc.identifier.urihttp://hdl.handle.net/11536/9577-
dc.description.abstractWe have prepared comparable-diameter ZnO and Zn(1-x)Co(x)O nanowires with both circular and hexagonal cross-sections. The average diameters are similar to 113 and similar to 134 nm for cylindrical and hexagonal nanowires, respectively. The as-grown nanowires have been characterized via structure, electrical conductivity and photoluminescence (PL) spectrum measurements. Pure ZnO nanowires were Co-ion implanted to make magnetic Zn(1-x)Co(x)O nanowires for magnetization studies. Bumpier edge surfaces on a nanometre scale, higher densities of stacking faults and a bending feature along the growth direction have been found in cylindrical ZnO nanowires. As compared with hexagonal nanowires, we have observed relatively higher conductivities in cylindrical nanowires, which implied large numbers of shallow donors existing in the latter nanowires. The cylindrical ZnO nanowires also displayed intensified green defect emission and considerably more stacking faults in the crystalline structure. In addition, we have found increased magnetization and stronger ferromagnetic ordering in cylindrical than in hexagonal Zn(1-x)Co(x)O nanowires, and have experimentally identified that the point defects of either Zn interstitials or O vacancies played governing roles in ferromagnetism. We conclude that the cross-sectional shape effect originating a varied point defect density can profoundly modulate the structural, electrical, optical as well as magnetic properties of ZnO and Zn(1-x)Co(x)O nanowires.en_US
dc.language.isoen_USen_US
dc.titleCross-sectional shape modulation of physical properties in ZnO and Zn(1-x)Co(x)O nanowiresen_US
dc.typeArticleen_US
dc.identifier.doi10.1088/1367-2630/10/3/033017en_US
dc.identifier.journalNEW JOURNAL OF PHYSICSen_US
dc.citation.volume10en_US
dc.citation.issueen_US
dc.citation.epageen_US
dc.contributor.department電子物理學系zh_TW
dc.contributor.departmentDepartment of Electrophysicsen_US
dc.identifier.wosnumberWOS:000254098800001-
dc.citation.woscount5-
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