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나노물질 및 화학반응 연구단
나노물질 및 화학반응 연구단
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Local conductance mapping of water-intercalated graphene on mica

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Title
Local conductance mapping of water-intercalated graphene on mica
Author(s)
Jin Heui Hwang; Hyunsoo Lee; Sangku Kwon; Jin Hyeok Jeong; Hee Chan Song; Joong Il Jake Choi; Jeong Young Park
Publication Date
2016-12
Journal
APPLIED PHYSICS LETTERS, v.109, no.24, pp.241602 -
Publisher
AMER INST PHYSICS
Abstract
We report that the conductance of graphene is influenced by intercalated water layers using current sensing atomic force microscopy (AFM). We obtained a confined water layer between chemical vapor deposition graphene and mica by transferring graphene onto mica in a liquid water bath. Atomic force microscopy topographic images confirm high coverage by a single water layer, and scanning tunneling microscopy (STM) verifies a clean surface without contamination by measuring the honeycomb lattice structure of the graphene. We show that the surface conductance is perturbed by the presence of a water layer between the graphene and mica, which is not found in the STM topographic image. We found that the graphene on the edge and at pinholes of the water layer exhibits lower conductance, compared with that of graphene on the water terrace. We attribute the perturbation of conductance to structural defects from the water film and a variation of interaction between the edge of the water and graphene. © 2016 Author(s)
URI
https://pr.ibs.re.kr/handle/8788114/3331
ISSN
0003-6951
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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