Hexagonal boron nitride at low temperatures: controlled synthesis and mechanism

Analytical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 10

Published: Jan. 17, 2025

As a structural counterpart of graphite, hexagonal boron nitride (hBN) exhibits distinct advantages over bulk hBN, including high thermal conductivity and electrical insulation, exceptional strength, low friction coefficient as well elastic modulus, which make it unique material for wide variety applications. Despite this, the controlled scalable synthesis maintaining stoichiometric balance between nitrogen atoms during crystal growth has remained daunting challenge in last few decades. Herein, simple yet efficient method was employed to optimize heat-treatment urea, thiourea, boric acid at melting temperatures. This resulted hBNs very temperatures single step, under normal atmospheric conditions. The FESEM images hBN produced from both urea thiourea showed formation layered structure nitrides. magnified TEM clearly depicted lattice fringes within hBN. overall results confirmed that V-shape might have helped produce large scale, bypassing use substrates, temperature or pressure.

Language: Английский

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Preparation and properties of the PDMS/h-BN/PDA composite anti-corrosion coating on a carbon steel surface

FlatChem, Journal Year: 2025, Volume and Issue: 50, P. 100839 - 100839

Published: Feb. 26, 2025

Language: Английский

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Programmable Piezoelectricity of 2D Hexagonal Boron Nitride via Defect Engineering

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 3, 2025

Piezoelectricity in 2D hexagonal boron nitride (hBN) plays a crucial role its applications various advanced functional devices. Therefore, appropriately adjusting intrinsic piezoelectric properties of hBN becomes desirable for different applications. Herein, using the Kelvin probe force microscope, it is directly found that local potentials monolayer can be enhanced by ≈20% after introduction defects. High-throughput molecular dynamics simulations on hundreds thousands defective structures further show continuous decrease or even increase coefficients properly designing defect structures. The tunability piezoelectricity to mainly attributed flexoelectric effects around defects, which reduce polarization stretched over 50%. To inversely design with specific properties, machine learning-based method proposed. Besides hBN, proposed engineering strategy also has capacity extended tailor other materials, such as molybdenum disulfide. This work not only expands understanding but offers novel approach property materials via engineering.

Language: Английский

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Synthesis and characterization of acrylic hexagonal boron nitride nanosheets for thermally stable polymethylmethacrylate composites

Diamond and Related Materials, Journal Year: 2025, Volume and Issue: unknown, P. 112323 - 112323

Published: April 1, 2025

Language: Английский

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Boron nitride nanosheets, quantum dots, and dots: Synthesis, properties, and biomedical applications

APL Materials, Journal Year: 2025, Volume and Issue: 13(4)

Published: April 1, 2025

This review examines three aspects of hexagonal boron nitride (h-BN) nanomaterials: properties, synthesis methods, and biomedical applications. We focus the scope on types h-BN nanostructures: nanosheets (BNNSs, few-layered h-BN, larger than ∼100 nm in lateral dimensions), quantum dots (BN QDs, smaller ∼10 all dimensions, with inherent excitation-dependent fluorescence), dots, wide bandgap without noise fluorescence). The methods BNNSs, BN are summarized top-down bottom-up approaches. Future research should scalability quality products, which essential for reproducible Regarding applications, BNNSs were used as nanocarriers drug delivery, mechanical reinforcements (bone tissue engineering), antibacterial QDs still limited non-specific bioimaging small dimension to construct high-brightness probes (HBPs) gene sequence detections inside cells. To differentiate from other two-dimensional materials, future applications using unique properties nanostructures, such piezoelectricity, neutron capture therapy (BNCT), their electrically insulating optically transparent nature. Examples would be combining BNCT chemo delivery form HBPs enhanced fluorescence by preventing quenching dots.

Language: Английский

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Enhanced mechanical and service properties of BN-ZrO2 ceramics by introducing SiCw combined with oscillatory pressure sintering

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

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