“White Graphenes”: Boron Nitride Nanoribbons via Boron Nitride Nanotube Unwrapping

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• 作者：Haibo Zeng ; Chunyi Zhi ; Zhuhua Zhang ; Xianlong Wei ; Xuebin Wang ; Wanlin Guo ; Yoshio Bando ; Dmitri Golberg
• 刊名：Nano Letters
• 出版年：2010
• 出版时间：December 8, 2010
• 年：2010
• 卷：10
• 期：12
• 页码：5049-5055
• 全文大小：713K
• 年卷期：v.10,no.12(December 8, 2010)
• ISSN：1530-6992

文摘

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