Issue 14, 2013
From the journal:

Nanoscale

Self-modulated band gap in boron nitridenanoribbons and hydrogenated sheets†

Zhuhua Zhang,*ab   Wanlin Guoa  and  Boris I. Yakobsonb  

* Corresponding authors

a State Key Laboratory of Mechanics and Control of Mechanical Structures, Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education and Institute of Nano Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
E-mail: zz19@rice.edu, wlguo@nuaa.edu.cn, biy@rice.edu

b Department of Mechanical Engineering and Materials Science, Rice University, Houston, Texas 77005, USA

Abstract

Using hybrid density functional theory calculations with van der Waals correction, we show that polar boron nitride (BN) nanoribbons can be favorably aligned via substantial hydrogen bonding at the interfaces, which induces significant interface polarizations and sharply reduces the band gap of insulating ribbons well below the silicon range. The interface polarization can strongly couple with carrier doping or applied electric fields, yielding not only enhanced stability but also widely tunable band gap for the aligned ribbons. Furthermore, similar layer-by-layer alignment also effectively reduces the band gap of a 2D hydrogenated BN sheet and even turns it into metal. This novel strategy for band gap control appears to be general in semiconducting composite nanostructures with polar nonbonding interfaces and thus offers unique opportunities for developing nanoscale electronic and optical devices.

Graphical abstract: Self-modulated band gap in boron nitride nanoribbons and hydrogenated sheets

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/C3NR01180A
Article type
Paper
Submitted
08 Mar 2013
Accepted
29 Apr 2013
First published
07 May 2013

Nanoscale, 2013,5, 6381-6387

Permissions

Request permissions

Self-modulated band gap in boron nitride nanoribbons and hydrogenated sheets

Z. Zhang, W. Guo and B. I. Yakobson, Nanoscale, 2013, 5, 6381 DOI: 10.1039/C3NR01180A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements