Issue |
EPL
Volume 148, Number 1, October 2024
|
|
---|---|---|
Article Number | 16002 | |
Number of page(s) | 7 | |
Section | Condensed matter and materials physics | |
DOI | https://doi.org/10.1209/0295-5075/ad7f83 | |
Published online | 07 October 2024 |
Pull-in features of nanoswitches in the Casimir regime with account of contact repulsion
1 Central Astronomical Observatory at Pulkovo of the Russian Academy of Sciences - Saint Petersburg, 196140, Russia
2 Peter the Great Saint Petersburg Polytechnic University - Saint Petersburg, 195251, Russia
3 Kazan Federal University - Kazan, 420008, Russia
Received: 29 July 2024
Accepted: 25 September 2024
The cantilever tip of a nanoswitch in close proximity to the ground plate is considered with account of electrostatic, elastic, van der Waals (Casimir), and also contact repulsive forces. The van der Waals (Casimir) and contact repulsive forces are computed for a Si cantilever and either Au or Ni ground plates using the Lifshitz theory and the method of pairwise summation with account of surface roughness. It is shown that at short separations an impact of the van der Waals (Casimir) force leads to the pull-in and collapse of a cantilever onto the ground plate if the contact repulsion is disregarded. Taking into consideration contact repulsion, the nanoswitch is demonstrated to have the stable cyclic behavior with no pull-in when switching voltage on and off.
© 2024 EPLA
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