Prosiectau fesul blwyddyn
Crynodeb
The 2-dimensional transformation of the diamond (111) surface to graphene has been demonstrated using ultrathin Fe films that catalytically reduce the reaction temperature needed for the conversion of sp3 to sp2 carbon. An epitaxial system is formed, which involves the re-crystallization of carbon at the Fe/vacuum interface and that enables the controlled growth of monolayer and multilayer graphene films. In order to study the initial stages of single and multilayer graphene growth, real time monitoring of the system was preformed within a photoemission and low energy electron microscope. It was found that the initial graphene growth occurred at temperatures as low as 500 C, whilst increasing the temperature to 560 C was required to produce multi-layer graphene of high structural quality. Angle resolved photoelectron spectroscopy was used to study the electronic properties of the grown material, where a graphene-like energy momentum dispersion was observed. The Dirac point for the first layer is located at 2.5 eV below the Fermi level, indicating an n-type doping of the graphene due to substrate interactions, while that of the second graphene layer lies close to the Fermi level. VC 2015 AIP Publishing LLC.
Iaith wreiddiol | Saesneg |
---|---|
Rhif yr erthygl | 181603 |
Cyfnodolyn | Applied Physics Letters |
Cyfrol | 107 |
Rhif cyhoeddi | 18 |
Dynodwyr Gwrthrych Digidol (DOIs) | |
Statws | Cyhoeddwyd - 03 Tach 2015 |
Ôl bys
Gweld gwybodaeth am bynciau ymchwil 'Controlling the growth of epitaxial graphene on metalized diamond (111) surface'. Gyda’i gilydd, maen nhw’n ffurfio ôl bys unigryw.Proffiliau
Prosiectau
- 1 Wedi Gorffen
-
Photoelectron Spectroscopy and Microscopy using Synchrotron Radiation for Exploiting Diamond surfaces and Interfaces
Evans, A. (Prif Ymchwilydd)
Engineering & Physical Sciences Research Council
01 Hyd 2009 → 30 Medi 2013
Prosiect: Ymchwil a ariannwyd yn allanol