Flash Reduction and Patterning of Graphite Oxide and Its Polymer Composite

Abstract

Graphite oxide (GO) is a promising precursor for the bulk production of graphene-based materials due to its relatively low cost of synthesis. The superior solvent processability of GO makes it particularly attractive for making composites by premixing with other materials. Typically, the reduction of GO has relied on either chemical agents or high temperature treatment. Here we report a room temperature, chemical-free flash reduction process where a photographic camera flash instantaneously triggers the deoxygenation reaction of GO by photothermal heating. Flash irradiation also rapidly creates a fused polymer composite from a random mixture of GO and polymer particles. Using a photomask, conducting patterns such as interdigitated electrode arrays can be readily made on flexible substrates.

Scalable fabrication of high-power graphene micro-supercapacitors for flexible and on-chip energy storage

“…Circuits designed on a computer can be patterned onto the DVD disc, which is now coated with a film of GO. We 19 and others 20 originally found an unusual photo-thermal effect in which GO absorbs high-intensity light and is converted into graphene. By using the precision of a laser, the drive renders the computerdesigned pattern onto the GO film to produce the desired graphene circuits 21 .…”

Highly selective gas sensor arrays based on thermally reduced graphene oxide

“…1d), which is in agreement with previously reported XRD data for similar heavily oxidized GO materials. 29,32,[52][53][54][55][56] The GO platelets were dispersed in distilled water to yield a 0.05 mg ml À1 solution, which was drop-cast on a modied KAMINA multisensor chip (Fig. 2a).…”

Graphene synthesis: a Review

“…Power source to camouflage uniforms is one possible application [72]. Other methods have been reported with the same phenomenon but with different light sources, such as UV or xenon flash [73,74], or different kinds of lasers, such as femtosecond laser, pulsed laser, etc. [75][76][77][78][79].…”