A Review on Synthesis Methods, Structures, Properties and Potential Applications of Graphene and Hexagonal Boron Nitride
摘要
The present work deals with two striking 2D materials possessing contrary features and enormous technological perspectives: graphene and h-BN. Graphene attains a tensile strength of 125 GPa and an elasticity modulus of 1.1 TPa. Various methods have been adopted for the synthesis of graphene, including CVD and mechanical exfoliation. It reaches a high thermal conductivity of 5300 W/m K, with a specific surface area of 2630 m2/g. With its high carrier mobility of 2 × 105 cm2/V s, it enables advanced nanoelectronics and energy storage. Hexagonal boron nitride is an insulating member with a band gap of ~ 5.5 eV. It has a very high thermal conductivity of 600–1000 W/m K and is stable up to 2000°C in inert conditions, synthesized by the CVD method, retains excellent structural integrity, and presents high dielectric strength in the range of 30–40 kV/mm, which renders it an ideal material for applications such as electronic insulation at high temperatures. This review underlines the potential synergy of graphene and h-BN for future applications in nanotechnology, semiconductors, and biomedicine.