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Electrochemical Polymerization of Functionalized Graphene Quantum Dots Mark B. Miltenburg, Tyler B Schon, Emily L Kynaston, Joseph G. Manion, and Dwight S. Seferos Chem. Mater., Just Accepted Manuscript • DOI: 10.1021/acs.chemmater.7b01700 • Publication Date (Web): 26 Jul 2017 Downloaded from http://pubs.acs.org on July 27, 2017
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Chemistry of Materials
Electrochemical Polymerization of Functionalized Graphene Quantum Dots Mark B. Miltenburg, Tyler B. Schon, Emily L. Kynaston, Joseph G. Manion, and Dwight S. Seferos* Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada Keywords: graphene quantum dots, nanomaterials, carbon materials, organic electrodes, conjugated polymers, functionalized graphene Graphene and graphene-based materials are highly attractive for applications that include photovoltaics, energy storage, and catalysis, but suffer from challenges associated with large scale processing of high-quality graphene. Graphene quantum dots (GQDs) are sheets of graphene with lateral dimensions less than 100 nm, and are high-quality, soluble graphene materials that are easily functionalized using traditional organic synthetic techniques, opening access to a variety of different chemical, mechanical and optoelectronic properties. In this work, we prepare GQDs where the outer edge is functionalized with chemically addressable 3,4ethylenedioxythiophene (EDOT) units. These EDOT-functionalized GQDs were electrochemically polymerized to form a covalently linked GQD/PEDOT film with properties well-suited for energy storage and catalysis applications. In particular a capacitance of 152.8 F/cm3 at 1.84 A/cm3 was achieved and this is superior to a similarly prepared poly(hydroxymethyl EDOT) film. This work thus introduces a new approach to the preparation of processable and functional graphene-based materials.
Graphene is a two-dimensional sheet of sp2 hybridized carbon atoms. It has been extensively studied due to its intriguing optoelectronic properties.1,2 However, its application in commercialized products has been limited by difficulties associated with processing pristine graphene.3 Graphene quantum dots (GQDs) are small graphene sheets, constrained in their lateral dimensions to
