AVS 63rd International Symposium & Exhibition
    Scanning Probe Microscopy Focus Topic Tuesday Sessions
       Session SP-TuP

Paper SP-TuP3
Temperature-dependent Nanoscale Conductance on Water-Intercalated Graphene

Tuesday, November 8, 2016, 6:30 pm, Room Hall D

Session: Scanning Probe Microscopy Poster Session
Presenter: JinHeui Hwang, Institute for Basic Science (IBS) & Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea
Authors: J.H. Hwang, Institute for Basic Science (IBS) & Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea
H. Lee, Institute for Basic Science (IBS) & Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea
J.Y. Park, Institute for Basic Science (IBS) & Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea
Correspondent: Click to Email
We investigated the nanoscale conductace of water-intercalated graphene using current-sensing atomic force microscopy (C-AFM). The intercalation of water between graphene and mica was enabled by transfer of chemical vapor deposition (CVD) graphene on mica substrate. Water molecules were captured in the liquid water bath during the graphene transfer process. We show that the surface conductance are significantly influenced by the presence of water layer between graphene and mica. We found that the edge of water island exhibits the lower conductance, compared to that of bare graphene. We futher showed conductance of graphene on the first water layer were fluctuated depending on the temperature. The anomalous behavior of conductance is originated by structural defects of water layer and bonding nature between edge of the water islands and mica substrate, which lead to the suppression of the local current.