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Trapping in a Casimir Force Set-Up Controlled by Solution Permeability

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arxiv 2505.10977 v1 pith:ANGVXQ4T submitted 2025-05-16 cond-mat.mtrl-sci

classification cond-mat.mtrl-sci
keywords casimirforcemagnetitetrappingachievedatomicattachedattraction
verification ladder T0 review T1 audit T2 compute T3 formal
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We have designed a system enabling tuning Casimir attraction/repulsion transitions between a polystyrene sphere attached to an atomic force microscope tip near a Teflon surface in a magnetic fluid mixture. Notably, the trapping distances can be changed by several orders of magnitude by changes in zero-frequency transverse electric contributions to the Casimir force. We demonstrate that this can be achieved via modifications in the average diameter for the magnetite particles while keeping the magnetite volume fractions fixed.

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