Issue 22, 2020

BAs nanotubes with non-circular cross section shapes for gas sensors

Abstract

The chirality-dependent property of CNTs hinders their application in next-generation electronic devices. There is thereby an urgent need to explore new 1D nanotubes with stable and controllable electronic properties. Here, we investigate the charge transport properties of several BAs nanotubes (BAsNTs) with different shapes by using first-principles density functional theory (DFT) and non-equilibrium Green's function (NEGF) methods. It is found that these BAs nanotubes are all semiconductors regardless of chirality and cross section shape, and their band gaps are very close (∼1 eV), which could overcome the chirality-dependent property shortcoming of CNTs and thus make them potential candidates for application in the field of electronic devices. In addition, we demonstrate that the encapsulation of H2O, CO2 and SO2 molecules has different effects on the BAsNTs with different cross section shapes. Particularly, when inserting H2O into the circular BAsNT, the negative differential resistance (NDR) phenomenon and a metal–semiconductor transition are observed. This novel characteristic makes BAsNTs potential candidates for application in gas sensors. The discovery may provide new opportunities for the design of next-generation BAsNT-based electronic devices and gas sensors.

Graphical abstract: BAs nanotubes with non-circular cross section shapes for gas sensors

Supplementary files

Article information

Article type
Paper
Submitted
30 Mar 2020
Accepted
19 May 2020
First published
19 May 2020

Phys. Chem. Chem. Phys., 2020,22, 12584-12590

BAs nanotubes with non-circular cross section shapes for gas sensors

X. Dai, Y. Jiang and H. Li, Phys. Chem. Chem. Phys., 2020, 22, 12584 DOI: 10.1039/D0CP01708F

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