Journal of Nanomedicine & Nanotechnology

Effect of external electric field on the application of graphene

2^nd International Conference on Nanotek and Expo

December 3-5, 2012 DoubleTree by Hilton Philadelphia Center City, USA

Zhimin Ao

Scientific Tracks Abstracts: J Nanomed Nanotechol

Abstract:

External electric field, which is often encountered in practical applications, can induce substantial alteration in materials with respect to their geometry, binding energies, chemical potentials and electronic properties. In this talk, it presents the effect of external electric field on the application of graphene as hydrogen storage materials, gas sensor materials, and in electronic devices based on first-principle calculations. For the case of hydrogen storage materials, the electric field can act as a switch to control the hydrogen storage/release through facilitating hydrogen dissociative adsorption in graphene under the electric field, while releasing hydrogen when removing the electric field. For graphene-based gas sensor materials, the electric field tunes the electronic structure of graphene as well as its electronic conductivity, and thus the sensitivity of the gas sensor. In electronic devices, the electric field can reversibly switch the transition of graphene from hydrophobic to hydrophilic, and change the geometry between graphene and the substrate in the devices, therefore controls its electronic properties. These demonstrate that external electric field is an effective tool for redistributing charges and changing chemical potentials, and thus some novel results can be achieved by superimposing a field into graphene system.

Biography :

Zhimin Ao received his PhD degree in Materials Science from Jilin University, China, in 2008. In 2009, he received the prestigious FWO Postdoctoral Research Fellowship to work as a Postdoctoral researcher in the Department of Physics at University of Antwerp, Belgium, from March 2009 to May 2010. His continual high academic performance led him to the highly competitive the University of New South Wales (UNSW) Vice-Chancellor?s Research Fellowship and joined the School of Materials Science and Engineering at UNSW in May 2010. So far, he has published more than 26 papers in peer-reviewed international journals and 3 book chapters. The publications have more than 277+ citations. Currently, he is leading a research team on the application of graphene-based materials; he is also a reviewer for several journals, including J. Am. Chem. Soc., Appl. Phys. Lett., J. Phys. Chem. C, Phys. Chem. Chem. Phys., and J. Appl. Phys