| 초록 |
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) induces a spontaneous formation of CF clusters and stable doping of graphene. To reveal the mechanism of stable solvent intercalation, desorption energy of CF molecules was measured using Arrhenius plots. 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. Furthermore, the thermal response of the conductance could be utilized to maintain a certain degree of p-doping, which provides the facile, sustainable, and controllable large area doping method of graphene for future generation of printed flexible electronics. |
