Quasi free-standing graphene growth on FIB-Patterned 3C-SiC nanostructures
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Date
2018-01-30
Journal Title
Journal ISSN
Volume Title
Publisher
Australian Institute of Physics
Abstract
There is a growing body of literature that recognizes the potential of graphene for use in electronics. However, graphene’s lack of bandgap challenges its remarkable range of applications. Theoretical work suggests that a bandgap might be opened in graphene through quantum confinement, for example in graphene nanoribbons. Thermal decomposition of SiC has proven to be an excellent method to grow transfer-free wafer-scale graphene. Growing graphene on SiC thin films on Si is a cheaper alternative to the growth on bulk SiC. In this research we attempt to manipulate the SiC substrate dimension to grow graphene over nanostructures and use hydrogen intercalation to produce quasi free-standing graphene. SiC mesas have been fabricated by patterning SiC/Si substrates using Focused Ion Beam (FIB) milling. Hydrogen intercalation procedure has been employed at 600 °C to fabricate free-standing graphene on the structures. Synchrotron radiation near-edge X-ray absorption fine structure (NEXAFS) with core-level photoelectron spectroscopy (PES), scanning tunnelling microscopy (STM), scanning electron microscopy (SEM), and Raman spectroscopy were used to investigate the process. Our result indicates the possibility of growing free-standing epitaxy graphene over SiC nanostructures. However, more research is needed to better understand the impact of patterning procedure on the graphene growth and decrease the damage caused by milling process.
Description
Keywords
Beams, Carbides, Carbon, Carbon compounds, Electron spectroscopy, Elements, Laser spectroscopy, Machining, Microscopy, Nonmetals, Radiation sources, Silicon compounds, Spectroscopy
Citation
Amjadipour, M., Tadich, A., MacLeod, J., Lipton-Duffin, J., Iacopi, F., & Motta, N. (2018). Quasi free-standing graphene growth on FIB-Patterned 3C-SiC nanostructures. Poster presented to the 42nd Annual Condensed Matter and Materials Meeting Charles Sturt University, Wagga Wagga, NSW 30th January – 2nd February, 2018. (pp. 91). Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2018/Wagga_2018_Conference_Handbook.pdf