| AVS 55th International Symposium & Exhibition | |
| Graphene Topical Conference | Tuesday Sessions |
| Session GR+TF+NC-TuA |
| Session: | Graphene: Characterization, Properties, and Application |
| Presenter: | P.E. Sheehan, Naval Research Laboratory |
| Authors: | P.E. Sheehan, Naval Research Laboratory Z. Wei, Naval Research Laboratory J.T. Robinson, Naval Research Laboratory D.E. Barlow, Naval Research Laboratory E.S. Snow, Naval Research Laboratory |
| Correspondent: | Click to Email |
Graphene and graphite oxide (GO) are new nanoscale building blocks that have generated widespread interest in both basic and applied research. The rapid, inexpensive, and reproducible generation of graphene and GO samples would expedite this work. To this end, we have directed the assembly of single-layered GO sheets using chemical templates patterned via micro contact printing.1 Single-layer GO was inexpensively produced using the Hummer method and redispersed in water. Templates of 11-Amino-1-undecanethiol SAMS were created using microcontact printing. Unlike prior work in fullerene templating, the GO sheets could be captured electrostatically without the aid of surfactants. This process yields isolated, single-layer graphene sheets that are arbitrarily located on a patterned substrate. The electrostatic capture mechanism was verified by varying the pH to turn capture on and off. We will discuss the parameters (pH, time, etc.) that affect GO adsorption as well as the surprising resistance of the unpassivated Au substrate to adsorption of the GO sheets. Finally, the adsorbed GO and graphene were electronically and spectroscopically characterized to determine the effect of capture on the reduction process.
1 submitted to Nano Letters.