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Title: Synthesis of Hexagonal Boron Nitride Mono layer: Control of Nucleation and Crystal Morphology

Journal Article · · Chemistry of Materials

Mono layer hexagonal boron nitride (hBN) attracts significant attention due to the potential to be used as a complementary two-dimensional dielectric in fabrication of functional 2D heterostructures. Here we investigate the growth stages of the hBN single crystals and show that hBN crystals change their shape from triangular to truncated triangular and further to hexagonal depending on copper substrate distance from the precursor. We suggest that the observed hBN crystal shape variation is affected by the ratio of boron to nitrogen active species concentrations on the copper surface inside the CVD reactor. Strong temperature dependence reveals the activation energies for the hBN nucleation process of similar to 5 eV and crystal growth of similar to 3.5 eV. We also show that the resulting h-BN film morphology is strongly affected by the heating method of borazane precursor and the buffer gas. Elucidation of these details facilitated synthesis of high quality large area monolayer hexagonal boron nitride by atmospheric pressure chemical vapor deposition on copper using borazane as a precursor.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1335331
Journal Information:
Chemistry of Materials, Vol. 27, Issue 23; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 165 works
Citation information provided by
Web of Science

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Synthesis of hexagonal boron nitride heterostructures for 2D van der Waals electronics journal January 2018
Kinetics of Graphene and 2D Materials Growth journal October 2018
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Submillimeter 2D Bi 2 Se 3 Flakes toward High-Performance Infrared Photodetection at Optical Communication Wavelength journal June 2018
Recent progress in the tailored growth of two-dimensional hexagonal boron nitride via chemical vapour deposition journal January 2018
Electronic and Optical Properties of 2D Materials Constructed from Light Atoms journal August 2018
Boron nitride: a promising material for proton exchange membranes for energy applications journal January 2019
Predicting the preferred morphology of hexagonal boron nitride domain structure on nickel from ReaxFF-based molecular dynamics simulations journal January 2019
Atomistic analysis to characterize the impact of temperature and defects on the mechanical properties of germanene sheet journal January 2018
A Review of Thermal Transport in Low-Dimensional Materials Under External Perturbation: Effect of Strain, Substrate, and Clustering journal January 2017
Optical absorption of single-layer hexagonal boron nitride in the ultraviolet journal October 2019
A Review on the Synergistic Features of Hexagonal Boron Nitride (White Graphene) as Adsorbent-Photo Active Nanomaterial journal July 2018
The mechanism of thiophene oxidation on metal-free two-dimensional hexagonal boron nitride journal January 2019
A study of boron nitride coatings on carbon fibers by the powder immersion reaction method journal June 2018
Synthesis of sub-millimeter single-crystal grains of aligned hexagonal boron nitride on an epitaxial Ni film journal January 2019
Excitons in hexagonal boron nitride single-layer: a new platform for polaritonics in the ultraviolet journal January 2019
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Recent Advances in Growth of Novel 2D Materials: Beyond Graphene and Transition Metal Dichalcogenides journal July 2018
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A review on thermo-mechanical properties of bi-crystalline and polycrystalline 2D nanomaterials journal April 2019
Controlled synthesis of 2D MX 2 (M = Mo, W; X = S, Se) heterostructures and alloys journal May 2018
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Excitons in two-dimensional atomic layer materials from time-dependent density functional theory: mono-layer and bi-layer hexagonal boron nitride and transition-metal dichalcogenides journal January 2020
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Wrinkled 2D Materials: A Versatile Platform for Low-Threshold Stretchable Random Lasers journal October 2017
Time dependent decomposition of ammonia borane for the controlled production of 2D hexagonal boron nitride. text January 2017
Missing links towards understanding equilibrium shapes of hexagonal boron nitride: algorithm, hydrogen passivation, and temperature effects text January 2018
Excitons in hexagonal boron nitride single-layer: a new platform for polaritonics in the ultraviolet text January 2018
Screen-Printable Electronic Ink of Ultrathin Boron Nitride Nanosheets journal December 2016
Introducing Overlapping Grain Boundaries in Chemical Vapor Deposited Hexagonal Boron Nitride Monolayer Films. journalarticle January 2017
Direct Observation of Early Stages of Growth of Multilayered DNA-Templated Au-Pd-Au Core-Shell Nanoparticles in Liquid Phase journal February 2019