氮化镓纳米线和纳米棒中的纳米管

Nanopipes in gallium nitride nanowires and rods.

作者信息

Jacobs Benjamin W, Crimp Martin A, McElroy Kaylee, Ayres Virginia M

机构信息

Department of Electrical and Computer Engineering, Michigan State University, East Lansing 48824, USA.

出版信息

Nano Lett. 2008 Dec;8(12):4353-8. doi: 10.1021/nl802198h.

DOI:10.1021/nl802198h

PMID:19367802

Abstract

Gallium nitride nanowires and rods synthesized by a catalyst-free vapor-solid growth method were analyzed with cross section high-resolution transmission electron microscopy. The cross section studies revealed hollow core screw dislocations, or nanopipes, in the nanowires and rods. The hollow cores were located at or near the center of the nanowires and rods, along the axis of a screw dislocation. The formation of the hollow cores is consistent with effect of screw dislocations with giant Burgers vector predicted by Frank.

摘要

采用无催化剂气-固生长法合成的氮化镓纳米线和纳米棒，通过横截面高分辨率透射电子显微镜进行了分析。横截面研究揭示了纳米线和纳米棒中存在中空核心螺旋位错，即纳米管。中空核心位于纳米线和纳米棒的中心或中心附近，沿着螺旋位错的轴。中空核心的形成与弗兰克预测的具有巨大伯格斯矢量的螺旋位错的作用一致。