Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 41: Graphene: Growth, Substrate Interaction, Intercalation, and Doping
O 41.2: Vortrag
Mittwoch, 7. September 2022, 10:45–11:00, S052
Using polyaromatic hydrocarbons for graphene growth — •Matthew A. Stoodley1, 2, Benedikt P. Klein1, 2, Luke A. Rochford2, Matthew Edmondson3, Marc Walker2, Tien-Lin Lee1, Alexander Saywell3, Reinhard J. Maurer2, and David A. Duncan1 — 1Diamond Light Source, Didcot, United Kingdom — 2University of Warwick, Coventry, United Kingdom — 3University of Nottingham, Nottingham, United Kingdom
Graphene, due to its widespread potential applications, has been one of the most studied materials this century. The most common approach to produce high quality graphene is through epitaxial growth utilising chemical vapour deposition (CVD) on copper surfaces. This method exploits the catalytic activity of copper to form highly crystalline, large area graphene. Traditionally, precursors used to grow graphene on Cu(111) require high pressures and elevated substrate temperatures, however, many cutting edge characterisation techniques cannot be used at such conditions. In this work, polyaromatic hydrocarbons (PAH) are used to grow high quality graphene on Cu(111) via CVD at relatively low surface temperatures. Furthermore, the low vapour pressure of the PAH permits us to synthesise graphene films in ultra-high vacuum conditions. We present a characterization of the grown graphene, by utilising a wide variety of techniques including Scanning Tunnelling Microscopy, X-ray photoelectron spectroscopy, normal incidence x-ray standing waves, and near edge X-ray adsorption fine structure.