Tailoring Single- and Double-Sided Fluorination of Bilayer Graphene via Substrate Interactions

Title
Tailoring Single- and Double-Sided Fluorination of Bilayer Graphene via Substrate Interactions
Authors
손장엽Huije RyuJunyoung KwonSiyuan HuangJaehyung YuJingwei XuKenji WatanabeTakashi TaniguchiEunji JiSol LeeYongjun ShinJong Hun KimKwanpyo KimArend M. vander ZandeGwan-Hyoung Lee
Keywords
Graphene; Chemical functionalization; Fluorination; Substrate interaction; Interlayer interactions
Issue Date
2021-01
Publisher
Nano letters
Citation
VOL 21, NO 2-898
Abstract
While many technologies rely on multilayer heterostructures, most of the studies on chemical functionalization have been limited to monolayer graphene. In order to use functionalization in multilayer systems, we must first understand the interlayer interactions between functionalized and nonfunctionalized (intact) layers and how to selectively functionalize one layer at a time. Here, we demonstrate a method to fabricate single- or double-sided fluorinated bilayer graphene (FBG) by tailoring substrate interactions. Both the top and bottom surfaces of bilayer graphene on the rough silicon dioxide (SiO2) are fluorinated; meanwhile, only the top surface of graphene on hexagonal boron nitride (hBN) is fluorinated. The functionalization type affects electronic properties; double-sided FBG on SiO2 is insulating, whereas single-sided FBG on hBN maintains conducting, showing that the intact bottom layer becomes electrically decoupled from the fluorinated top insulating layer. Our results define a straightforward method to selectively functionalize the top and bottom surfaces of bilayer graphene.
URI
http://pubs.kist.re.kr/handle/201004/72144
ISSN
1530-6984
Appears in Collections:
KIST Publication > Article
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