| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Re-entrant-Groove-Assisted VLS Growth of Boron Carbide Five-Fold Twinned Nanowires |
| FU Xin1,2, JIANG Jun1,2, LIU Chao1, YU Zhi-Yang1,2, Steffan LEA3, YUAN Jun2,3 |
| 1Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 1000842Beijing National Center for Electron Microscopy, Tsinghua University, Beijing 1000843Department of Physics, University of York, York YO10 5DD, U.K. |
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FU Xin, JIANG Jun, LIU Chao et al 2009 Chin. Phys. Lett. 26 086110 |
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Abstract We report a preferential growth of boron carbide nanowires with a five-fold twinned internal structure. The nanowires are found to grow catalytically via iron boron nanoparticles, but unusually the catalytic particle is in contact with the low-energy surfaces of boron carbide with V-shaped contact lines. We propose that this catalytical growth may be caused by preferential nucleation at the re-entrant grooves due to the twinning planes, followed by rapid spreading of atomic steps. This is consistent with the observed temperature dependence of the five-fold twinned nanowire growth.
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61.46.Km
81.10.Aj
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Received: 21 April 2009
Published: 30 July 2009
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| PACS: |
61.46.Km
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(Structure of nanowires and nanorods (long, free or loosely attached, quantum wires and quantum rods, but not gate-isolated embedded quantum wires))
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81.10.Aj
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(Theory and models of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
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