Uncovering the Potential of Graphene Oxide Membranes
Applications Include Flexible Electronics and Water Purification
- Dr. Angel Perez del Pino specializes in the transformation of materials by laser processing.
- Math functions applied to data using MountainsMap software.
- Superimposition of the two layers shows a high correspondence between resistance-related structural defects and topography in the GO sample irradiated in gaseous conditions.
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Graphene oxide (GO) is a two-dimensional nanomaterial composed of a graphene monolayer highly functionalized with oxygen-containing chemical groups. Recently, GO nanostructures have attracted great interest due to their exceptional physicochemical properties for many applications. Crucially, GO sheets can be converted into a graphene-like material, named reduced graphene oxide (rGO), by relatively easy, scalable and cost-effective synthesis methods. GO has therefore arisen as a key element in obtaining graphene-like materials at an industrial scale.
Dr. Angel Perez del Pino of the Instituto de Ciencia de Materiales de Barcelona (ICMAB) in Spain, specializes in the transformation of materials by laser processing. With fellow researchers, he recently published findings on the conductivity of such processed GO materials.
"Graphene oxide exhibits very interesting functional properties: it is dispersable in water, biocompatible and its electrical conductivity and optical band gap can be tailored just by modifying its oxidation degree. GO is an electrical insulator whereas rGO is more conductive and can act as a p-type semiconductor. Both GO and rGO have tremendous potential to be used in a variety of electrochemical applications, such as photocatalysts.
Laser processing has arisen as a very promising tool for scalable fabrication of rGO-based devices. In a recent study, we applied nanosecond pulsed ultraviolet laser radiation to GO membranes in gaseous and liquid ammonia-rich conditions. By analyzing structure and composition of the resulting materials, we were able to demonstrate significant differences in the morphology and chemical composition of samples fabricated under analogous laser conditions in these two different environments.”
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