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Anomalous resistance change of ultrastrained individual MWCNT using MEMS-based strain engineering
By: Kuno, T.; Yamauchi, K.; Isono, Y.; Sugano, K.;
2015 / IEEE
This item from - IEEE Conference - 2015 28th IEEE International Conference on Micro Electro Mechanical Systems (MEMS) - This research clarified the anomalous electric resistance change of ultrastrained multi-walled carbon nanotube (MWCNT), as well as its mechanical properties, using the Electrostatically Actuated NAnotensile Testing device (EANAT) mounted on the in-situ SEM nanomanipulation system. The Young's modulus of MWCNT and its shear stress during interlayer sliding deformation were estimated from the load-displacement curve. The electrical resistance of the MWCNT was 215 kΩ without strain, which was similar to the previously reported value, however the anomalous resistance change was observed under enormous strain. Although the resistance change ratio was almost constant during interlayer sliding of the MWCNT, it specifically showed a sharp raise at the end of the sliding in spite of the MWCNT not breaking mechanically. The molecular dynamics (MD) simulation provided a good understanding that the atomic reconfiguration due to the hard sticking at the edge of extracted outer layer of MWCNT might induce the sharp raise of resistance without its mechanically breaking. This result reported here is extremely important for reliability of MWCNT interconnects.
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