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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

Thursday , 23 October 2014
(at 13:00 in room HAL 115)
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Understanding Charge Transport in Graphene-based Materials: From Concepts to Applications

Stephan Roche

Catalan Institute of Nanoscience & Nanotechnology, Campus UAB, Spain

In this talk, I will discuss charge transport in complex forms of graphene (chemically reduced graphene oxides and polycrystalline graphene), of relevance for current and future applications in flexible electronics, transparent electrodes, energy harvesting devices and spintronics. The key role of predictive modelling (comprising multiscale simulation) will be outlined, as enabling tool for new discoveries and for material benchmarking and quantum device profiling. One will focus on the issue of structural imperfections introduced either during the wafer-scale production of graphene with chemical growth (CVD), or through the mechanical/chemical exfoliation and chemical transfer to versatile substrates. Fundamental properties of charge transport in polycrystalline graphene, accounting the variability in average grain sizes and grain boundaries (as observed in real samples grown by CVD) will be discussed, together with their relevance for device optimization and diversification of technological functionalities, such as gas sensors, transparent electrodes and so forth.


Aron W. Cummings, D. Loc Duong, V. Luan Nguyen, D. Van Tuan, J. Kotakoski, J.E. Barrios Vargas, Young Hee Lee and S Roche, Charge Transport in Polycrystalline Graphene: Challenges and Opportunities, Advanced Materials 26, Issue 30, pages 5079-5094 (2014)

Brief Bio:

Stephan Roche is ICREA Research Professor working at the Catalan Institute of Nanosciences and Nanotechnology-ICN2 in Barcelona, and head of the “Theoretical and Computational Nanoscience” group which focuses on the theoretical exploration of quantum transport phenomena in materials such as graphene, and topological insulators. After studying Theoretical Physics at the Ecole Normale Supérieure in France, he received a PhD in Physics in 1996 working at CNRS, and then worked in Japan, Spain and Germany. In 2000, he was appointed Professor Assistant at UJF (France) and CEA Researcher in 2004. During his stay at the Nanoscience Institute - INAC/CEA, he supervised the “simulation platform” of the CHEMTRONICS program, in preparation of the NANOSIMULATION program. In 2009, he was awarded the Friedrich Wilhelm Bessel prize from the Alexander von Humboldt Foundation (Germany). He is the PI of ICN2 in the GRAPHENE FLAGSHIP initiative (

Announcement (pdf)

Invited by G. Cuniberti

Within the nanoSeminar

last modified: 2021.05.05 Wed
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