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5 October 2023 Tunable critical Casimir forces counteract Casimir–Lifshitz attraction
Agnese Callegari, Falko Schmidt, Abdallah Daddi-Moussa-Ider, Battulga Munkhbat, Ruggero Verre, Timur Shegai, Mikael Käll, Hartmut Löwen, Andrea Gambassi, Giovanni Volpe
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Proceedings Volume PC12663, Molecular and Nanophotonic Machines VI; PC1266308 (2023) https://doi.org/10.1117/12.2677282
Event: SPIE Organic Photonics + Electronics, 2023, San Diego, California, United States
Abstract
In developing micro- and nanodevices, stiction between their parts is a well-known problem. It is caused by the finite-temperature analogue of the quantum electrodynamical Casimir–Lifshitz forces, which are normally attractive. Repulsive Casimir–Lifshitz forces have been realized experimentally, but their reliance on specialized materials severely limits their applicability and prevents their dynamic control. Here we demonstrate that repulsive critical Casimir forces, which emerge in a critical binary liquid mixture upon approaching the critical temperature, can be used to counteract stiction due to Casimir–Lifshitz forces and actively control microscopic and nanoscopic objects with nanometre precision.
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Agnese Callegari, Falko Schmidt, Abdallah Daddi-Moussa-Ider, Battulga Munkhbat, Ruggero Verre, Timur Shegai, Mikael Käll, Hartmut Löwen, Andrea Gambassi, and Giovanni Volpe "Tunable critical Casimir forces counteract Casimir–Lifshitz attraction", Proc. SPIE PC12663, Molecular and Nanophotonic Machines VI, PC1266308 (5 October 2023); https://doi.org/10.1117/12.2677282
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KEYWORDS
Critical temperature
Mixtures
Nanostructures
Quantum experiments
Liquids
Microelectromechanical systems
Nanoelectromechanical systems
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