Structure, Properties and Applications of Two‐Dimensional Hexagonal Boron Nitride

Abstract

Hexagonal boron nitride (h-BN) has emerged as a strong candidate for twodimensional (2D) material owing to its exciting optoelectrical properties combined with mechanical robustness, thermal stability, and chemical inertness. Super-thin h-BN layers have gained significant attention from the scientific community for many applications, including nanoelectronics, photonics, biomedical, anti-corrosion, and catalysis, among others. This review provides a systematic elaboration of the structural, electrical, mechanical, optical, and thermal properties of h-BN followed by a comprehensive account of stateof-the-art synthesis strategies for 2D h-BN, including chemical exfoliation, chemical, and physical vapor deposition, and other methods that have been successfully developed in recent years. It further elaborates a wide variety of processing routes developed for doping, substitution, functionalization, and combination with other materials to form heterostructures. Based on the extraordinary properties and thermal-mechanical-chemical stability of 2D h-BN, various potential applications of these structures are described.The ORCID identification number(s) for the author(s) of this article can be found under

Direct growth of hexagonal boron nitride on non-metallic substrates and its heterostructures with graphene

“…Hexagonal boron nitride (h-BN) is a two-dimensional (2D) synthetic binary compound formed from atoms of alternating boron and nitrogen arranged in a sp 2 -hybridized hexagonal planar lattice with lattice constants of a = b = 2.50 Å, and c = 6.661 Å ( Wickramaratne et al., 2018 ). The parent compound, boron nitride exists in three crystalline forms namely hexagonal (h-BN), cubic (c-BN), and wurtzite (w-BN), and an amorphous form (a-BN) ( Roy et al., 2021 ). Of these, only the hexagonal crystalline form is a layered hexagonal structure similar to graphite (sp 2 hybridized hexagonal carbon lattice).…”

Emerging Flexible Thermally Conductive Films: Mechanism, Fabrication, Application

“…As shown in Fig. 9 a, BN is very versatile and conformable in various geometric patterns, which can be exfoliated/transferred to BN nanosheets (BNNS), BN spherical nanoparticles, BN nanoribbons, BN nanoscroll, and BN nanotubes (BNNT) via ultrasonication, liquid exfoliation, plasma treatment and CVD method [ 134 ]. Using MD simulation, Zhu et al [ 135 ] found that the order of thermal conductivity enhancing effectiveness of BN-based nanofillers is ranked as BNNS > BNNT > BN nanoparticle.…”

Hydrogen storage on flat land materials, opportunities, and challenges: A review study

“…Hexagonal boron nitride is strong 2D and inorganic material having interesting applications from aerospace to medicine. [ 81 ] H‐BN has gained significant attention from the researchers due to many application including nano electronics, photonics, anticorrosion, catalysis, biomedical, etc.…”

“…There are four types of BN) (a) Amorphous type (a‐BN), (b) hexagonal (h‐BN), (c) cubic(c‐BN), and (d) wurtzite (w‐BN). [ 81,82 ] Cubic BN is a diamond‐like structure, [ 83 ] whereas h‐BN is the honey comb structure. Due to highly packed structure, c‐BN is considered as the hardest material.…”