Pull-in features of nanoswitches in the Casimir regime with account of contact repulsion G. L. Klimchitskaya, A. S. Korotkov, V. V. Loboda and V. M. Mostepanenko EPL, 148 1 (2024) 16002 Published online: 07 October 2024 DOI: 10.1209/0295-5075/ad7f83