Optical trapping and critical Casimir forces

Agnese Callegari; Alessandro Magazzù; Andrea Gambassi; Giovanni Volpe

doi:10.1117/12.3008358

20 September 2023 Optical trapping and critical Casimir forces

Agnese Callegari, Alessandro Magazzù, Andrea Gambassi, Giovanni Volpe

Proceedings Volume 12606, Optical Manipulation and Structured Materials Conference; 1260610 (2023) https://doi.org/10.1117/12.3008358
Event: Optics and Photonics International Congress, 2023, Yokohama, Japan

Abstract

Critical Casimir forces emerge between objects, such as colloidal particles, whenever their surfaces spatially confine the fluctuations of the order parameter of a critical liquid used as a solvent. These forces act at short but microscopically large distances between these objects, often reaching hundreds of nanometers. Keeping colloids at such distances is a major experimental challenge, which can be addressed by the means of optical tweezers. Here, we review how optical tweezers have been successfully used to quantitatively study critical Casimir forces acting on particles in suspensions. As we will see, the use of optical tweezers to experimentally study critical Casimir forces can play a crucial role in developing nanotechnologies, representing an innovative way to realize self-assembled devices at the nano- and microscale.

Citation Download Citation

Agnese Callegari, Alessandro Magazzù, Andrea Gambassi, and Giovanni Volpe "Optical trapping and critical Casimir forces", Proc. SPIE 12606, Optical Manipulation and Structured Materials Conference, 1260610 (20 September 2023); https://doi.org/10.1117/12.3008358

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