Oxidize Graphene by UV-Ozone Treatment in Vacuum Chamber

Abstract

As changing graphene properties is vital to promote it as electronic device, we developed graphene modified method with epoxy group by two simple methods: ultraviolet irradiation with various partial oxygen pressures and ultraviolet irradiation under rich oxygen condition with various temperatures. By Hall measurement, the electric mobility in graphene was decreased with increasing temperature during UV-ozone treatment at 50 °C, 80 °C, 100 °C and 120 °C. At low partial oxygen pressure (less than 160 Torr) the oxidation degree is not significant. Additionally, Raman spectroscopy showed the disrupted π-π structure in graphene. Based on the above identification we supposed that epoxy group might establish on graphene surface. © 2016 American Scientific Publishers. All rights reserved