Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Single crystal growth of monoisotopic hexagonal boron nitride from a Fe–Cr flux

Author affiliations

Abstract

Hexagonal boron nitride (hBN) is an important insulator that is incorporated into numerous 2D electronic, optoelectronic, and photonic devices, whereas natural hBN is a mixture of 20% 10B and 80% 11B isotopes, and monoisotopic hBN is a variant with just a single boron isotope, either 10B or 11B. Consequently, monoisotopic hBN has a higher thermal conductivity and a stronger neutron absorption (in the case of h10BN), making it superior for neutron detectors, heat management materials in nano flexible electronic devices, and phonon polariton-based nanophotonics. Here we synthesized approximately monoisotopic hBN using boron powder containing a single boron isotope and nitrogen, and grew single crystals from a Fe–Cr metal flux at atmospheric pressure. Narrow Raman peaks from the shear (≤1.3 cm−1) and intralayer (≤3.3 cm−1) modes demonstrate that the crystals are highly ordered. In the photoluminescence spectra, the presence of phonon-assistant transition peaks is also indicative of the high-quality of the crystals. This growth protocol permits us to get rid of the emission at 4.1 eV. This work provides a novel material for studying the fundamental properties of isotopic effects and the high-performance hBN device.

Graphical abstract: Single crystal growth of monoisotopic hexagonal boron nitride from a Fe–Cr flux

Back to tab navigation

Article information


Submitted
01 May 2020
Accepted
19 Jun 2020
First published
19 Jun 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Single crystal growth of monoisotopic hexagonal boron nitride from a Fe–Cr flux

J. Li, C. Elias, G. Ye, D. Evans, S. Liu, R. He, G. Cassabois, B. Gil, P. Valvin, B. Liu and J. H. Edgar, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/D0TC02143A

Social activity

Search articles by author

Spotlight

Advertisements