Mechanisms of residual polymer removal in solvent mixtures after the graphene transfer and effects on channel conductivity gate control
ST PETERSBURG POLYTECHNIC UNIVERSITY JOURNAL-PHYSICS AND MATHEMATICS(2023)
摘要
After graphene transfer, solvent mixtures were used to remove residual PMMA, which efficiency was estimated by AFM, Raman spectroscopy, and CVC. That post-treatment gives: stress relaxation (2D peak shift, compared to trichloroethylene), 2D/G intensity ratio 1.1 changes to 2.6, clean graphene regions exceed 100-150 nm size; threshold point shifts to zero but the conductivity and mobility reduce. Ethanolamine functionalizes both PMMA and graphene.
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关键词
graphene transfer,polymer removal,sensor,polymethyl methacrylate
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