Issue 35, 2024

Low-cost growth of high-quality monoisotopic hexagonal boron nitride single crystals using a boric acid precursor

Abstract

Monoisotopic-boron-enriched hexagonal boron nitride (hBN) has a higher thermal conductivity (10B- or 11B-enriched), larger phonon lifetime (10B- or 11B-enriched) and stronger neutron absorption cross-section (10B-enriched) than the natural, non-isotopic-enriched hBN counterpart. These features make monoisotopic hBN highly desirable for application in neutron detectors, nanoscale electronics, and optical components. Herein, we synthesized monoisotopic hBN single crystals (SCs) using isotope-enriched boric acid based on the atmospheric-pressure high-temperature (APHT) method. X-ray diffraction measurements indicated that the monoisotopic hBN SCs were well-crystallized. Detailed Raman measurements verified the high crystal quality and uniformity. The dependency of the Raman peak position and peak width on the isotope content was also observed, matching well with theoretical calculations. In the cathodoluminescence spectra, the presence of a longitudinal optical (LO) phonon-related emission at around 5.75 eV was also indicative of the high quality of the crystals. Thus, our results present a low-cost route for the synthesis of high-quality monoisotope-enriched hBN single crystals.

Graphical abstract: Low-cost growth of high-quality monoisotopic hexagonal boron nitride single crystals using a boric acid precursor

Article information

Article type
Paper
Submitted
17 ⵢⵓⵏ 2024
Accepted
20 ⵢⵓⵍ 2024
First published
24 ⵢⵓⵍ 2024

J. Mater. Chem. C, 2024,12, 13854-13862

Low-cost growth of high-quality monoisotopic hexagonal boron nitride single crystals using a boric acid precursor

M. Tian, C. Ding, H. Shi, J. Shu, R. Chen, M. A. S. Akash, Z. Hu, N. Afzal, T. Lin and N. Wan, J. Mater. Chem. C, 2024, 12, 13854 DOI: 10.1039/D4TC02524E

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