Issue 11, 2018, Issue in Progress

Lateral size selection of liquid exfoliated hexagonal boron nitride nanosheets

Abstract

Hexagonal boron nitride (h-BN) is of great importance in imaging, thermal and quantum applications in the mid-infrared regions (most of which are size related) for its natural hyperbolic properties. Liquid exfoliation is a promising production approach, however it is limited by the wide range of nanosheet length and thickness. Here we demonstrate a simple and effective method to sort the exfoliated nanosheets according to their lateral sizes. The process uses a combination of low-rate and high-rate configurations to separate the lateral lengths ranging from 1 to 3 μm. In contrast to Raman spectroscopy, infrared results exhibit intensive dependence on the nanosheet length, where the E1u phonon frequency and intensity ratio of E1u to A2u modes are significantly sensitive to the nanosheet length owing to the large anisotropy between the in-plane and out-of-plane axes.

Graphical abstract: Lateral size selection of liquid exfoliated hexagonal boron nitride nanosheets

Supplementary files

Article information

Article type
Paper
Submitted
29 Nov 2017
Accepted
31 Jan 2018
First published
05 Feb 2018
This article is Open Access
Creative Commons BY license

RSC Adv., 2018,8, 5976-5983

Lateral size selection of liquid exfoliated hexagonal boron nitride nanosheets

W. Gao, Y. Zhao and H. Yin, RSC Adv., 2018, 8, 5976 DOI: 10.1039/C7RA12872J

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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