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Towards nanoreliability of CNT-based sensor applications: Investigations of CNT-metal interfaces combining molecular dynamics simulations, advanced in situ experiments and analytics

 
: Hartmann, S.; Shaporin, A.; Hermann, S.; Bonitz, J.; Heggen, M.; Meszmer, P.; Sturm, H.; Hölck, O.; Blaudeck, T.; Schulz, S.E.; Mehner, J.; Gessner, T.; Wunderle, B.

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Institute of Electrical and Electronics Engineers -IEEE-; IEEE Components, Packaging, and Manufacturing Technology Society:
16th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems, EuroSimE 2015 : 19-22 April 2015, Budapest, Hungary
Piscataway, NJ: IEEE, 2015
ISBN: 978-1-4799-9949-1 (Print)
ISBN: 978-1-4799-9950-7
ISBN: 978-1-4799-9951-4
pp.271-278
International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE) <16, 2015, Budapest>
English
Conference Paper
Fraunhofer IZM ()
Fraunhofer ENAS ()

Abstract
In this paper we present results of our recent efforts to understand the mechanical interface behaviour of single-walled carbon nanotubes (CNTs) embedded in metal matrices. We conducted experimental pull-out tests of CNTs embedded in Pd or Au and found maximum forces in the range 10-102 nN. These values are in good agreement with forces obtained from molecular dynamics simulations taking into account surface functional groups (SFGs) covalently linked to the CNT material. The dominant failure mode in experiment is a CNT rupture, which can be explained with the presence of SFGs. To qualify the existence of SFGs on our used CNT material, we pursue investigations by means of fluorescence labeling of surface species in combination with Raman imaging. We also report of a tensile test system to perform pull-out tests inside a transmission electron microscope to obtain in situ images of CNT-metal interfaces under mechanical loads at the atomic scale.

: http://publica.fraunhofer.de/documents/N-417962.html