Reduced graphene oxide (RGO) coated fabrics were obtained by chemical reduction of GO on polyester (PES) fabrics. Conducting fabrics that have different applications were obtained by applying several layers of RGO. Electrochemical techniques not traditionally used for the characterization of these materials were used to test their electrical and electrochemical properties. Electrochemical impedance spectroscopy was used to measure the electrical properties. The resistance of the original PES was more than 10 11 Ω·cm 2 , but when coated with three RGO layers, the resistance decreased to 23.15 Ω·cm 2 . Phase angles changed from 90º for PES and PES-GO (capacitative behavior) to 0º for all the RGO coated samples (resistive behavior). Electro-activity was measured by cyclic voltammetry (CV) and scanning electrochemical microscopy. An increase in electro-activity was observed when the inactive GO was reduced to RGO.With CV an increase of electro-activity was observed with an increasing number of RGO layers. The contact between the different RGO sheets is responsible for the electric conduction in the fabrics. The techniques used showed that with only one RGO 1 ISE memberPage 2 of 38 A c c e p t e d M a n u s c r i p t 2 coating, the contact between the RGO sheets is not good and more coatings were needed to assure good electrical and electrochemical properties.

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Please cite this article as: J. Molina, Chemical and electrochemical study of fabrics coated with reduced graphene oxide, Applied Surface Science (2013), http://dx.doi.org/10. 1016/j.apsusc.2013.04.020 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. and showed a decrease of 5 orders of magnitude in the resistance (Ω) when GO was reduced to RGO. The phase angle also changed from 90º for PES-GO (capacitative behavior) to 0º for RGO coated fabrics (resistive behavior). In general an increase in the number of RGO layers produced an increase of the conductivity of the fabrics. EIS measurements in metal/sample/electrolyte configuration showed better electrocatalytic properties and faster diffusion rate for RGO specimens. Scanning electrochemical microscopy was employed to test the electroactivity of the different fabrics obtained.The sample coated with GO was not conductive since negative feedback was obtained.When GO was reduced to RGO the sample behaved like a conducting material since positive feedback was obtained. Approach curves indicated that the redox mediator had influence on the electrochemical response. The Fe(CN) 6 3-/4-redox mediator produced a higher electrochemical response than Ru(NH 3 ) 6 3+/2+ one.

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