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Introducing Functionality by Graphene Covalent Grafting
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SYSNO ASEP 0482802 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Introducing Functionality by Graphene Covalent Grafting Author(s) Kovaříček, Petr (UFCH-W) ORCID, RID
Kalbáč, Martin (UFCH-W) RID, ORCIDSource Title Nanocon 2017 : conference proceedings : 9th International Conference on Nanomaterials - Research & Application. - Ostrava : Tanger Ltd., 2018 - ISBN 9788087294819 Pages s. 33-39 Number of pages 7 s. Publication form Medium - C Action NANOCON 2017. International Conference on Nanomaterials - Research & Application /9./ Event date 18.10.2017 - 20.10.2017 VEvent location Brno Country CZ - Czech Republic Event type WRD Language eng - English Country CZ - Czech Republic Keywords graphene ; covalent functionalization ; PEDOT Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects LL1301 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015073 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFCH-W - RVO:61388955 UT WOS 000452823300004 Annotation Graphene is a material of great potential in a broad range of applications, for each of which specific tuning of the material’s properties is required. This can be achieved, for example, by covalent functionalization. We have exploited protocols for surface grafting by diazonium salts, by nucleophilic and electrophilic substitution to perform graphene covalent modification of graphene on substrates. The painstaking analysis problem of monolayered materials was addressed using Raman spectroscopy, SERS, SEIRA, MS, AFM, XPS and SEM/EDX. The covalent grafting was shown to tolerate the transfer process, thus allowing ex post transfer from copper to other substrates. Functional devices often require combination of several materials with specific functions, such as graphene-polymer hybrid heterostructures. We have used the developed methodology of chemical functionalization for preparation of PEDOT:Graphene bilayers by selective in situ polymerization of EDOT on covalently functionalized graphene. The polymerization proceeds exclusively on the grafted graphene, and patterned structures with high spatial resolution down to 3 μm could have been prepared. The composite exhibits enhanced efficiency of electrochemical doping compared to pristine graphene, unsymmetrical transport characteristic with very good hole-transporting properties and efficient electronic communication between the two materials. The covalent functionalization of graphene thus introduces advanced functionality to the material, broadening its scope of applications. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2019
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