Highly concentrated graphene solutions via polymer enhanced solvent exfoliation and iterative solvent exchange.
Efficient graphene exfoliation in a nontraditional solvent, ethanol, is achieved through the addition of a stabilizing polymer, ethyl cellulose. Iterative solvent exchange is further demonstrated as a rapid, room-temperature, ultracentrifugation-free approach to concentrate the graphene solution to a level exceeding 1 mg/mL. The outstanding processability and electrical properties of these graphene inks are verified through the realization of aligned graphene-polymer nanocomposites and transparent conductive graphene thin films.
Northwestern University, Department of Materials Science and Engineering and Department of Chemistry, 2220 Campus Drive, Evanston, Illinois 60208-3108, United States.
Yu Teng
YT
Liang
Mark C
MC
Hersam