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Lee, Geunsik
Electronic Structure and Transport in Condensed Materials
Research Interests
  • open quantum system, non-equilibrium electron transport
  • electron correlation, dynamical mean field theory
  • 2D materials, metal complexes


Substrate-Induced Solvent Intercalation for Stable Graphene Doping

DC Field Value Language Kim, Hyun Ho ko Yang, Jae Won ko Jo, Sae Byeok ko Kang, Boseok ko Lee, Seong Kyu ko Bong, Hyojin ko Lee, Geunsik ko Kim, Kwang S. ko Cho, Kilwon ko 2014-09-01T07:03:31Z - 2014-09-01 ko 2013-02 ko
dc.identifier.citation ACS NANO, v.7, no.2, pp.1155 - 1162 ko
dc.identifier.issn 1936-0851 ko
dc.identifier.uri -
dc.description.abstract Here, we report a substrate-induced intercalation phenomenon of an organic solvent at the interface between monolayer graphene and a target substrate. A simple dipping of the transferred chemical vapor deposition (CVD)-grown graphene on the SiO2 substrate into chloroform (CHCl3, CF), a common organic solvent, induces a spontaneous formation of CF clusters beneath the basal plane of the graphene as well as inside the wrinkles. The microscopic and spectroscopic observations showed the doping behavior of monolayer graphene, which indicates the adsorption of CF to monolayer graphene. Interestingly, the intercalated organic solvent showed remarkable stability for over 40 days under ambient conditions. To reveal the underlying mechanism of the stable solvent intercalation, desorption energy of CF molecules at the graphene/substrate interface was measured using Arrhenius plots of the conductance change upon time and temperature. Two stages of solvent intercalations with high desorption energies (70 and 370 meV) were observed along with the consecutive shrinkage of the solvent clusters at the basal plane and the wrinkles, respectively. Moreover, the theoretical calculation based on density functional theory (DFT) also shows the strong intercalation energy of CF between monolayer graphene and the SiO2 substrate, which results from the stabilization of the graphene-SiO2 interactions. Furthermore, the thermal response of the conductance could be utilized to maintain a certain degree of p-doping of monolayer graphene, which provides the facile, sustainable, and controllable large-area doping method of graphene for future generation of printed flexible electronics. ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.publisher AMER CHEMICAL SOC ko
dc.title Substrate-Induced Solvent Intercalation for Stable Graphene Doping ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84874414503 ko
dc.identifier.wosid 000315618700032 ko
dc.type.rims ART ko
dc.description.wostc 17 *
dc.description.scopustc 9 * 2015-05-06 * 2014-09-01 *
dc.identifier.doi 10.1021/nn306012p ko
dc.identifier.url ko
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