|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Frontiers in Advanced Functional Thin Films and Nanostructured Materials
||Graphitization and Growth of Free-standing Nanocrystalline Graphene Using In Situ Transmission Electron Microscopy
||C.N. Shyam Kumar, Kiran Chakravadhanula, Di Wang, Xiaoke Mu, Ralph Krupke, Christian Kuebel
|On-Site Speaker (Planned)
Graphitization of polymers offers an effective way to synthesize nanocrystalline graphene on different substrates with tunable shape, thickness and properties. We have extended this approach to study the catalyst free thermal formation of free-standing nanocrystalline graphene films following the graphitization using in situ TEM techniques, combining atomic and high resolution imaging, diffraction and electron energy loss spectroscopy to image the chemical and structural evolution, the stability and mobility of individual graphitic subunits and their interaction to understand the fundamental processes controlling graphene growth. In particular, this study revealed strong structural fluctuations of individual graphitic subunits at high temperatures, indicates Ostwald ripening in addition to merging of graphitic domains as a growth mechanism and allows to directly study stability differences of graphitic subunits connected to defects.
||Planned: Supplemental Proceedings volume