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Three-Dimensional Structure of Twinned and Zigzagged One-Dimensional Nanostructures Using Electron Tomography

Authors
Kim, Han SungMyung, YoonCho, Yong JaeJang, Dong MyungJung, Chan SooPark, JeungheeAhn, Jae-Pyoung
Issue Date
5월-2010
Publisher
AMER CHEMICAL SOC
Keywords
Electron tomography; twinned nanowires; superlattice; Zn3P2 nanowires; InAs nanowires
Citation
NANO LETTERS, v.10, no.5, pp.1682 - 1691
Indexed
SCIE
SCOPUS
Journal Title
NANO LETTERS
Volume
10
Number
5
Start Page
1682
End Page
1691
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/116547
DOI
10.1021/nl1000168
ISSN
1530-6984
Abstract
Electron tomography and high-resolution transmission electron microscopy were used to characterize the unique three-dimensional (3D) structures of twinned Zn3P2 (tetragonal) and InAs (zinc blende) nanowires synthesized by the vapor transport method. The Zn3P2 nanowires adopt a unique superlattice structure that consists of twinned octahedral slice segments having alternating orientations along the axial [111] direction of a pseudo cubic unit cell. The apexes of the octahedral slice segment are indexed as six equivalent < 112 > directions at the [111] zone axis. At each 30 degrees turn, the straight and zigzagged morphologies appear repeatedly at the < 112 > and < 011 > zone axes, respectively. The 3D structure of the twinned Zn3P2 nanowires is virtually the same as that of the twinned InAs nanowires. In addition, we analyzed the 3D structure of zigzagged CdO (rock salt) nanowires and found that they include hexahedral segments, whose six apexes are matched to the < 011 > directions, linked along the [111] axial direction. We also analyzed the unique 3D structure of rutile TiO2 (tetragonal) nanobelts; at each 90 degrees turn, the straight morphology appears repeatedly, while the in-between twisted form appears at the [011] zone axis. We suggest that the TiO2 nanobelts consist of twinned octahedral slices whose six apexes are indexed by the < 011 >/< 001 > directions with the axial [010] direction.
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