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ISSN: 2155-9821

Journal of Bioprocessing & Biotechniques
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Research Article

Ultra-Thin Films of Reduced Graphene Oxide (RGO) Nanoplatelets Functionalized with Different Organic Materials

Tiago P Almeida1,2, Celina M Miyazaki3, Diogo Volpati4, Tatiana A Silva5, Maria Luisa Braunger5, Anerise de Barros6, Frank Hollmann2 and Antonio Riul Jr1,5*
1PIPG Bioenergia-UNICAMP, Campinas, SP, Brazil
2Department of Biotechnology, Delft University of Technology, Delft, The Netherlands
3Centro de Ciências e Tecnologias para a Sustentabilidade- UFSCa, Sorocaba, SP, Brazil
4Department of Natural Sciences, Mid Sweden University, SE-851 70, Sundsvall, Sweden
5Applied Physics Department, “Gleb Wataghin” Institute of Physics, University of Campinas (UNICAMP), SP, Brazil
6Functional Materials Laboratory, Institute of Chemistry, University of Campinas (UNICAMP), SP, Brazil
*Corresponding Author : Antonio Riul Jr.
Applied Physics Department
“Gleb Wataghin” Institute of Physics
University of Campinas (UNICAMP), SP, Brazil
Tel: 551-935-215-336
E-mail: [email protected]
Received: March 03, 2016 Accepted: March 18, 2016 Published: March 22, 2016
Citation: Almeida TP, Miyazaki CM, Volpati D, Silva TA, Braunger ML, et al. (2016) Ultra-Thin Films of Reduced Graphene Oxide (RGO) Nanoplatelets Functionalized with Different Organic Materials. J Bioprocess Biotech 6:272. doi:10.4172/2155-9821.1000272
Copyright: © 2016 Almeida TP, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

This work aims the functionalization of reduced graphene oxide nanoplatelets with chitosan (G-chitosan) and also with poly(styrenesulfonic acid) (GPSS), thus forming stable, dispersed aqueous solutions. G-chitosan and GPSS solutions allowed the layer-by-layer (LbL) film formation with glucose oxidase (GOx), establishing multilayered nanostructures with elevated control in thickness and morphology. The graphene nanoplatelets were characterized by UV-vis and FTIR spectroscopies, resulting in good adherence and linear deposition of the graphene nanoplatelets with GOx in the LbL structures. Cyclic voltammetry shows an enlargement in the current intensity with increasing number of deposited LbL layers, possibly owing to the formation of conducting paths by the graphene nanoplatelets in the tailored multilayer nanomaterial formed.

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