Skip to main content

In-situ probing of the thermal treatment of h-BN towards exfoliation.

Yan, Z., Abdelkader, A.M., Day, S., Tang, C., Casiraghi, C. and Mirihanage, W., 2021. In-situ probing of the thermal treatment of h-BN towards exfoliation. Nanotechnology, 32 (10), 105704.

Full text available as:

[img]
Preview
PDF (OPEN ACCESS ARTICLE)
Yan_2021_Nanotechnology_32_105704.pdf - Published Version
Available under License Creative Commons Attribution.

1MB
[img] PDF (OPEN ACCESS ARTCILE)
Yan+et+al_2020_Nanotechnology_10.1088_1361-6528_abce2e.pdf - Accepted Version
Restricted to Repository staff only
Available under License Creative Commons Attribution.

1MB

DOI: 10.1088/1361-6528/abce2e

Abstract

Two-dimensional (2D) hexagonal boron nitride (h-BN) is becoming increasingly interesting for wider engineering applications. Thermal exfoliation is being suggested as a facile technology to produce large quantities of 2D h-BN. Further optimization of the process requires fundamental understanding of the exfoliation mechanism, which is hardly realized by ex-situ techniques. In this study, time resolved in-situ synchrotron X-ray powder diffraction experiments are conducted while heat treating bulk h-BN up to 1273 K. During the heating process, linear expansion of c-axis is observed and the contraction of a-axis up to around 750 K is consistent with previous research. However, a changing behavior from contraction to expansion in a- axis direction is newly observed when heating over 750 K. With the consideration of previous thermally oxidation studies, a hypothesis of thermal assisted exfoliation with oxygen interstitial and substitution of nitrogen at high temperature is proposed.

Item Type:Article
ISSN:0957-4484
Uncontrolled Keywords:2D material exfoliation ; X-ray diffraction ; hexagonal boron nitride
Group:Faculty of Science & Technology
ID Code:34922
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:01 Dec 2020 10:32
Last Modified:11 Jan 2021 14:25

Downloads

Downloads per month over past year

More statistics for this item...
Repository Staff Only -