Optical tweezers in single-molecule experiments Annamaria Zaltron, Michele Merano, Giampaolo Mistura, Cinzia Sada and Flavio Seno Eur. Phys. J. Plus, 135 11 (2020) 896 Published online: 10 November 2020 DOI: 10.1140/epjp/s13360-020-00907-6