Fabrication of reduced graphene oxides (RGOs) thin films has been well documented with various methods via chemical or thermal reduction of graphene oxides (GOs) thin films.  However, fabrication of RGOs or chemically functionalized RGOs thin films has been challenging by using RGOs or chemically functionalized RGOs because of bad dispersibility of RGOs or not developed suitable coating method.  In this work, fabrication and characterization of transparent conducting films have been demonstrated using thiol functionalized reduced graphene oxides, called �mercapto reduced graphene oxides (m-RGOs)�, in a facile and rapid process.  The m-RGOs readily dispersed in various solvents including alcohols have allowed fabrication of m-RGOs thin films.  Langmuir-Blodgett (LB) films of m-RGOs were obtained by transferring their Langmuir films, formed by simple drop casting of m-RGOs dispersion on water surface, onto various substrates including gold, glass and indium tin oxide.  The m-RGO LB films showed low sheet resistances down to about 500 kO/sq at 92% optical transparency.  The successful results make m-RGOs promising for applications in transparent conductive coatings, biosensing, etc.

Direct fabrication and characterization of Langmuir Blodgett films of reduced graphene oxides via pre-functionalization with thiols

248th National Meeting (2014)

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