Dislocation-Driven Nanowire Growth and Eshelby Twist
作者： M. J. Bierman , Y. K. A. Lau , A. V. Kvit , A. L. Schmitt , S. Jin
关键词: Nanowire 、 Dislocation 、 Crystallography 、 Vapor–liquid–solid method 、 Condensed matter physics 、 Materials science 、 Characterization (materials science) 、 Crystal growth 、 Burgers vector 、 Nanostructure 、 Lead sulfide
摘要: Hierarchical nanostructures of lead sulfide nanowires resembling pine trees were synthesized by chemical vapor deposition. Structural characterization revealed a screwlike dislocation in the nanowire trunks with helically rotating epitaxial branch nanowires. It is suggested that the screw component of an axial dislocation provides the self-perpetuating steps to enable one-dimensional crystal growth, in contrast to mechanisms that require metal catalysts. The rotating trunks and branches are the consequence of the Eshelby twist …
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