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

Thursday , 26 February 2015
(at 13:00 in room HAL 115 )
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Tribology of quasi-1D carbon based nanostructures (Toy models, simulations and experiments)

Andrea Benassi

TU Dresden

The capability to synthesize atomically precise objects of large length, such as graphene opens the possibility to transpose the peculiar nanoscale tribological properties, such as superlubricity, to larger scales and exploit them to reduce friction and wear in micro and nano-mechanical devices. Understanding the mechanical response of such nano-structures is also crucial to improve their manipulation and the capability to assemble them into functional structures/circuits.
A simple analytical model to predict the breaking of superlubricity, as the size of the nanostructures grows, will be presented and discussed in light of the recent data on graphene nanotubes experiments.
Recent results on the manipulation of graphene nano-ribbons on gold surfaces will be presented and interpreted through molecular dynamics simulation and continuum mechanics models. Non-trivial behaviors and nonlinearities reveal how important the computational/modeling support can be to sustain experimental efforts.

Brief Bio:

Andrea Benassi took his PhD in physics and nano-science at the University of Modena and Reggio Emilia (Italy) with prof. Carlo Calandra Buonaura with a thesis on the role of Casimir forces in micro and nano mechanical systems. In the subsequent years he worked in many national research centers in Italy such as the Democritos Simulation Center in Trieste (with prof. Erio Tosatti) and the Statistical Material Modeling Lab. in Milano (with Dr. Stefano Zapperi) studying, numerically and analytically, non-equilibrium phenomena at surfaces and interfaces, e.g. friction and diffusion processes. In 2012 he moved to Zurich in EMPA, a federal laboratory for material science research (with Dr. Daniele Passerone) with a large networking project aimed at designing novel techniques to reduce/control friction and dissipation in micro and nanoscale mechanical devices. In January 2015 he joined the group of Prof. Gianaurelio Cuniberti as independent researcher in Dresden, at present he works on large scale modeling/simulation of non-equilibrium processes at disordered and complex interfaces.

Announcement (pdf)

Invited by G. Cuniberti

Within the nanoSeminar

last modified: 2021.10.21 Thu
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