凯发

Graphene’s unique structural elements, including being a single-atom thick, two-dimensional and extensively conjugated, endow graphene with advantageous high surface area, good biocompatibility, strong mechanical strength, excellent thermal conductivity and fast electron transportation thermal properties, which enhance its potential for application in fabrication of electronic devices, sensors, energy storage devices, heat dissipation materials and drug delivery. In this presentation, we will report on the preparation, application and commercialization of graphene in our group [1-5]. Reduction of graphite oxide, ball-milling of graphite, chemical vapor deposition (CVD) method and matrix-assisted exfoliation of graphite are utilized by us and we also obtain graphene nanodots via ion beam sputtering deposition (IBSD) [1, 2]. For example, uniform three-dimensional (3-D) graphene nanodots-encaged porous gold electrode can be prepared via IBSD technique and mild corrosion chemistry for efficient enzyme electrode fabrication. Enzymes, like glucose oxidase and catalase, were modified with pyrene functionalities and then loaded into the graphene nanodots encaged porous gold electrode via non-covalent π-π stacking interaction between pyrene and graphene (Fig. 1a) [1, 2]. In addition, the highly oriented pyrolytic graphite (HOPG) electrodes was modified with pyrene-functionalized biotin (PFB), via π–π stacking, and ethylene glycol antifouling molecules, via covalent bonding, for detection of streptavidin [5]. However, there are still many challenges in graphene production and commercialization. The difficulty to overcome is its irreversible aggregation. However, via self-developed special oxidation-deduction process the large-scale production of graphene was realized in Huagao Graphene Technology Co. Ltd. (Fig. 1b). A number of commercial graphene products such as graphene powder, graphene dispersion, graphene quantum dots, graphene/polymer composites, graphene papers and graphene composites apparatus are on sale.