Fabrication and Characterization of Graphene/Hexagonal Boron Nitride Hybrid Sheets

Abstract

The synthesis of graphene and hexagonal boron nitride (hBN) hybrid sheets has been achieved using a two-step chemical vapor deposition (CVD) process. Individual grains of single-layer graphene are grown from methane, and hBN is, then, synthesized from ammonia borane on the same copper (Cu) foil. Optical absorption and Raman measurements reveal that the hBN is formed on the bare surface of Cu foil and the graphene grains play a crucial role as an inactive protective layer of Cu foil for the ammonia borane CVD. Furthermore, the hBN growth is found to be initiated preferentially by the edge of graphene grains.

Synthesis of in-plane and stacked graphene/hexagonal boron nitride heterostructures by combining with ion beam sputtering deposition and chemical vapor deposition

“…It can be clearly seen that triangular h-BN domains with light colour are in contrast to the irregular graphene flakes with dark colour, as is commonly reported. 16,17,21,27 Given the growth time of 30 s, the growing graphene was perfectly filled in the region between h-BN domains, forming in-plane graphene/h-BN heterostructures on the whole Cu foils (Fig. At the initial growth stage of 20 s, the graphene flakes nucleated randomly on the bare surface of Cu foils, as shown in Fig.…”

Vertical and in-plane heterostructures from WS2/MoS2 monolayers

“…Lateral heterostructures, in contrast, can only be created via growth. Both vertical and in-plane heterostructures of semimetallic graphene and insulating h-BN have been recently demonstrated via chemical vapor deposition (CVD) [20][21][22][23][24] ; however, direct growth of heterostructures consisting of different semiconducting monolayers has not been achieved.…”

Chemical Vapor Deposition Growth of Graphene and Related Materials

“…In addition to such vertical heterostructures, recent progresses in growth techniques such as CVD and physical vapor transport have allowed for the synthesis of lateral heterostructures based on monolayer graphene=boron nitrides [156][157][158][159][160][161][162][163] and two different types of monolayer TMDCs. 155,[164][165][166] One of the most interesting aspects is that lateral heterostructures have one-dimensional interfaces, which have been theoretically predicted to exhibit unique electric and magnetic properties such as half-metal and spin polarization.…”