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Nanosprings

Appl. Phys. Lett. 79, 1540 (2001); doi:10.1063/1.1400079

Issue Date: 3 September 2001

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D. N. McIlroy, D. Zhang, and Y. Kranov
Department of Physics, Engineering and Physics Building, University of Idaho, Moscow, Idaho 83844-0903

M. Grant Norton
School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164-2920
The transition from linear to helical growth of amorphous boron carbide nanowires has been examined with high-resolution transmission electron microscopy. Based on the observed changes of the iron catalyst at the transition point from linear to helical growth, a model of helical growth of solid nanowires has been developed based on the work of adhesion of the metallic catalyst to the tip of the nanowire. This model demonstrates that contact angle anisotropy at the catalyst/wire interface drives helical growth. The anisotropy is introduced when the radius of the droplet (R) exceeds the radius of the nanowire (rho), and the center of mass of the metal droplet is displaced laterally from the central axis of the nanowire. ©2001 American Institute of Physics.
History: Received 13 April 2001; accepted 16 July 2001
Permalink: http://link.aip.org/link/?APPLAB/79/1540/1
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KEYWORDS and PACS

Keywords
PACS
  • 61.46.+w
    Structure of solids and liquids; crystallography Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals
  • 81.07.Bc
    Materials science Nanoscale materials and structures: fabrication and characterization Nanocrystalline materials
  • 68.37.Lp
    Surfaces and interfaces; thin films and low-dimensional systems (structure and nonelectronic properties) Microscopy of surfaces, interfaces, and thin films Transmission electron microscopy (TEM) (including STEM, HRTEM, etc.)
  • 61.43.-j
    Structure of solids and liquids; crystallography Disordered solids
  • 81.07.Vb
    Materials science Nanoscale materials and structures: fabrication and characterization Quantum wires
  • 81.16.Hc
    Materials science Methods of nanofabrication and processing Catalytic methods
  • 68.65.La
    Surfaces and interfaces; thin films and low-dimensional systems (structure and nonelectronic properties) Low-dimensional, mesoscopic, and nanoscale systems: structure and nonelectronic properties Quantum wires
  • YEAR: 2001

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
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REFERENCES (16)
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