Solution-Processed Layered Hexagonal Boron Nitride Dielectrics: A Route toward Fabrication of High Performance Flexible Devices

2019 ◽  
Vol 1 (10) ◽  
pp. 2130-2139 ◽  
Author(s):  
Bikesh Gupta ◽  
H. S. S. Ramakrishna Matte
Keyword(s):  
Boron Nitride ◽  
High Performance ◽  
Hexagonal Boron Nitride ◽  
Solution Processed ◽  
Flexible Devices

Reaction Synthesized Boron Nitride-Containing Composites (BNCC)

2007 ◽  
Vol 280-283 ◽  
pp. 1385-1390
Author(s):  
Guo Jun Zhang ◽  
Tatsuki Ohji ◽  
Shuzo Kanzaki
Keyword(s):  
Boron Nitride ◽  
Hot Pressing ◽  
High Performance ◽  
Hexagonal Boron Nitride ◽  
High Strength ◽  
Reactive Sintering ◽  
Boron Source ◽  
Inorganic Reactions ◽  
Reactive Hot Pressing

Based on the proposed inorganic reactions a series of high performance hexagonal boron nitride-containing composites (BNCC), include SiC-BN, Si3N4-SiC-BN, SiAlON-BN, AlN-BN, Al2O3-BN, AlON-BN and mullite-BN, have been prepared via reactive hot pressing or pressureless reactive sintering. Various boron-bearing components such as B, B4C, AlB2, SiB4, SiB6, B2O3 or H3BO3, 9Al2O3×2B2O3 (9A2B) and 2Al2O3×B2O3 (2AB) are used as the boron source. On the other hand, nitrogen gas or solid state nitirgen-bearing metal nitrides such as Si3N4 and AlN can be used as the nitrogen source. The in situ synthesized composites demonstrated homogeneous and isotropical microstructures with very fine (nano-sized) BN platelets or their agglomerates distributed in the matrixes. These composites showed high strength, low elasticity and improved strain tolerance. In this article the reaction design, thermodynamics, reaction mechanisms, reactive hot pressing or pressureless reactive sintering, microstructures and mechanical properties will be discussed.

Wafer-scale single-crystal hexagonal boron nitride film via self-collimated grain formation

Science ◽  
2018 ◽  
Vol 362 (6416) ◽  
pp. 817-821 ◽  
Author(s):  
Joo Song Lee ◽  
Soo Ho Choi ◽  
Seok Joon Yun ◽  
Yong In Kim ◽  
Stephen Boandoh ◽  
...  
Keyword(s):  
Boron Nitride ◽  
High Performance ◽  
Hexagonal Boron Nitride ◽  
Chemical Vapor ◽  
Nitride Film ◽  
Monolayer Films ◽  
Single Crystalline ◽  
Wafer Scale ◽  
Liquid Gold ◽  
Grain Formation

Although polycrystalline hexagonal boron nitride (PC-hBN) has been realized, defects and grain boundaries still cause charge scatterings and trap sites, impeding high-performance electronics. Here, we report a method of synthesizing wafer-scale single-crystalline hBN (SC-hBN) monolayer films by chemical vapor deposition. The limited solubility of boron (B) and nitrogen (N) atoms in liquid gold promotes high diffusion of adatoms on the surface of liquid at high temperature to provoke the circular hBN grains. These further evolve into closely packed unimodal grains by means of self-collimation of B and N edges inherited by electrostatic interaction between grains, eventually forming an SC-hBN film on a wafer scale. This SC-hBN film also allows for the synthesis of wafer-scale graphene/hBN heterostructure and single-crystalline tungsten disulfide.

High performance vertical tunneling diodes using graphene/hexagonal boron nitride/graphene hetero-structure

2014 ◽  
Vol 104 (5) ◽  
pp. 053103 ◽  
Author(s):  
Seung Hwan Lee ◽  
Min Sup Choi ◽  
Jia Lee ◽  
Chang Ho Ra ◽  
Xiaochi Liu ◽  
...  
Keyword(s):  
Boron Nitride ◽  
High Performance ◽  
Hexagonal Boron Nitride ◽  
Hetero Structure ◽  
Tunneling Diodes

Enhanced thermal conductivity and flame retardancy of polyamide 6/flame retardant composites with hexagonal boron nitride

2018 ◽  
Vol 38 (8) ◽  
pp. 767-774 ◽  
Author(s):  
Liang Wang ◽  
Luchong Zhang ◽  
Andreas Fischer ◽  
Yuhua Zhong ◽  
Dietmar Drummer ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Boron Nitride ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
High Performance ◽  
Heat Dissipation ◽  
Hexagonal Boron Nitride ◽  
Light Emitting Diode ◽  
Polyamide 6 ◽  
Twin Screw

Abstract High performance composite of polyamide 6 (PA6)/flame retardant (FR)/hexagonal boron nitride (hBN) was prepared via twin screw extrusion, followed by injection molding. The heat dissipation of the composite was significantly improved by incorporating 40 vol% of hBN, and the corresponding thermal conductivity was up to 5.701 W/(m·K), nearly 17 times that of the PA6/FR composites. In addition, the combination effect of hBN and FR to the flame retardancy of the composites was observed, and the addition of hBN could dramatically enhance the flame retardancy of composites, achieving a UL94 V-0 rating with a limited oxygen index (LOI) value of 37%. This multifunctional modification would broaden the application field of PA6 composites in light-emitting diode (LED) lamps, electronic products, and so on.

scholarly journals Fabrication of electrochemical sensor biosystems through hexagonal boron nitride Nanosheets for extraction lead in human serum

2020 ◽  
Vol 3 (01) ◽  
pp. 49-54 ◽  
Author(s):  
Alisha Saanvi ◽  
Ringo Krishnan ◽  
Amoli Hassan ◽  
Rmesh K. Gupta*©
Keyword(s):  
Boron Nitride ◽  
Biomedical Applications ◽  
High Performance ◽  
Hexagonal Boron Nitride ◽  
Bet Surface Area ◽  
Covalent Functionalization ◽  
Wave Voltammetry ◽  
Wide Range ◽  
New Type ◽  
Straightforward Approach

In recent years have seen a surge of increased interest in the exfoliation of boron nitride (h-BN) due to its exciting electrical, thermal, photonics mechanical properties and sensing. Several approach to have emerged describing the exfoliation, functionalized and solubilization of h-BN. In this study, we report on a straightforward approach to modify the surface and its application as a new type of biomedical applications. The prepared product is structurally characterized by FTIR spectroscopy, field emission (FESEM), TGA technique, XPS spectrum, and BET surface area measurements. Nano- composites were immobilized on electrodes to detect the glucose, L-cysteine in buffer medium by cyclic voltammetry (CV), square wave voltammetry (SWV), and impedance spectroscopic (EIS). potential application of the covalent functionalization, cheap precursors, biodegradability and multifunctionality of high-performance composites boron nitride, they could be used for a wide range of the future biomedical applications.

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