Graphene, a two-dimensional sheet of covalently bonded carbon atoms, represents a promising material for highly conductive thin films in the fabrication of transparent electrodes (1,2). For the development of graphene-based multifunctional nanostructured hybrids materials, the setup of deposition techniques fully compatible with flexible polymeric substrates, low temperature processes and solution processable materials, suitable for large-area manufacturing technologies is needed (3-5). We propose the use of electrophoretic deposition to interface nano-carbon materials – carbon nanotubes and graphene sheets – which possess highly specific and widely variable functions to develop a process that is compatible with a variety of device designs. The electrophoretic deposition represents an efficient and easily scalable method to deliver an hybrid material that can represent a compromise between the high nanotube conductivity and the good graphene optical transmittance. Moreover this method is completely compatible with polymeric substrates allowing a uniform deposition of carbon thin films that span several square centimetres in area with tailored optical and electrical properties depending on the deposition time.
One-step electrophoretic deposition of transparent and conducting graphene-carbon nanotubes composites
BITTOLO BON, SILVIA;VALENTINI, LUCA;KENNY, Jose Maria;
2010
Abstract
Graphene, a two-dimensional sheet of covalently bonded carbon atoms, represents a promising material for highly conductive thin films in the fabrication of transparent electrodes (1,2). For the development of graphene-based multifunctional nanostructured hybrids materials, the setup of deposition techniques fully compatible with flexible polymeric substrates, low temperature processes and solution processable materials, suitable for large-area manufacturing technologies is needed (3-5). We propose the use of electrophoretic deposition to interface nano-carbon materials – carbon nanotubes and graphene sheets – which possess highly specific and widely variable functions to develop a process that is compatible with a variety of device designs. The electrophoretic deposition represents an efficient and easily scalable method to deliver an hybrid material that can represent a compromise between the high nanotube conductivity and the good graphene optical transmittance. Moreover this method is completely compatible with polymeric substrates allowing a uniform deposition of carbon thin films that span several square centimetres in area with tailored optical and electrical properties depending on the deposition time.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
