Electronic Tuning of Monolayer Graphene with Polymeric “Zwitterists”

J.N. Pagaduan, N. Hight-Huf, A. Datar, M. Barnes, D. Naveh, A. Ramasubramaniam*, R. Katsumata*, and T. Emrick*, “Electronic Tuning of Monolayer Graphene with Polymeric “Zwitterists”,” ACS Nano, 15, 2762–2770 (2021). [DOI]

This paper describes the impact of zwitterion chemistry on work function modulation of monolayer graphene by investigating a series of sulfobetaine-based random copolymer ultrathin films with increasing steric footprint in contact with the 2D material. Covalent attachment of a photo-crosslinker into the polymer structure enabled the first successful lithographic patterning of solution-processable negative-tone “zwitterists” for non-covalent electronic modification of graphene. This zwitterionic polymer design holds promise for advancing the role of polymers in fine-tuning 2D materials electronics.

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