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【分享】原子級后BN納米帶－－最近的Nano Lett 已有1人參與
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http://www.sciencenet.cn/m/user_content.aspx?id=381773 http://pubs.acs.org/doi/abs/10.1021/nl103251m “White Graphenes”: Boron Nitride Nanoribbons via Boron Nitride Nanotube Unwrapping AbstractFull Text HTMLHi-Res PDF[6097 KB]PDF w/ Links[713 KB]Supporting InfoFiguresHaibo Zeng*†, Chunyi Zhi†, Zhuhua Zhang‡, Xianlong Wei†, Xuebin Wang†, Wanlin Guo*‡, Yoshio Bando†, and Dmitri Golberg*† † International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan ‡ Institute of Nano Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China Nano Lett., Article ASAP DOI: 10.1021/nl103251m Publication Date (Web): October 28, 2010 Copyright © 2010 American Chemical Society * To whom correspondence should be addressed. E-mail: (H.Z.) ZENG.Haibo@nims.go.jp, hbzeng@issp.ac.cn; (W.G) wlguo@nuaa.edu.cn; (D.G.) GOLBERG.Dmitri@nims.go.jp. Abstract Inspired by rich physics and functionalities of graphenes, scientists have taken an intensive interest in two-dimensional (2D) crystals of h-BN (analogue of graphite, so-called “white” graphite). Recent calculations have predicted the exciting potentials of BN nanoribbons in spintronics due to tunable magnetic and electrical properties; however no experimental evidence has been provided since fabrication of such ribbons remains a challenge. Here, we show that few- and single-layered BN nanoribbons, mostly terminated with zigzag edges, can be produced under unwrapping multiwalled BN nanotubes through plasma etching. The interesting stepwise unwrapping and intermediate states were observed and analyzed. Opposed to insulating primal tubes, the nanoribbons become semiconducting due to doping-like conducting edge states and vacancy defects, as revealed by structural analyses and ab initio simulations. This study paves the way for BN nanoribbon production and usage as functional semiconductors with a wide range of applications in optoelectronics and spintronics. Keywords:“White graphene”; boron nitride (BN); nanoribbon; nanosheet; two-dimensional crystal |
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