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Catalytic Conversion of Hexagonal Boron Nitride to Graphene for In-Plane Heterostructures
journal contribution
posted on 2015-07-08, 00:00 authored by Gwangwoo Kim, Hyunseob Lim, Kyung Yeol Ma, A-Rang Jang, Gyeong Hee Ryu, Minbok Jung, Hyung-Joon Shin, Zonghoon Lee, Hyeon Suk ShinHeterostructures of hexagonal boron
nitride (h-BN) and graphene have attracted a great deal of attention
for potential applications in 2D materials. Although several methods
have been developed to produce this material through the partial substitution
reaction of graphene, the reverse reaction has not been reported.
Though the endothermic nature of this reaction might account for the
difficulty and previous absence of such a process, we report herein
a new chemical route in which the Pt substrate plays a catalytic role.
We propose that this reaction proceeds through h-BN hydrogenation;
subsequent graphene growth quickly replaces the initially etched region.
Importantly, this conversion reaction enables the controlled formation
of patterned in-plane graphene/h-BN heterostructures, without needing
the commonly employed protecting mask, simply by using a patterned
Pt substrate.