The locality of surface interactions on colloidal probes

Abstract

The Casimir and electromagnetic interactions between objects at short separations are strongly influenced by the local geometry near the point of closest approach. In this paper we demonstrate that the assumptions underlying common statistical analysis of roughness may not hold in experiments using micro-spheres as interacting objects. Based on an extensive experimental and numerical analysis of the surface topology of the widely used colloidal particle types 4310A and 4320A, we show that the actual variation in the local surface curvature may give rise to large uncertainties in the comparison of experimental data to theories.

References in corpus (11)

• Control of the Casimir force by the modification of dielectric properties with light
• Halving the Casimir force with conductive oxides
• Demonstration of the difference Casimir force for samples with different charge carrier densities
• The Casimir force between rough metallic plates
• Roughness correction to the Casimir force : Beyond the Proximity Force Approximation
• No anomalous scaling in electrostatic calibrations for Casimir force measurements
• Roughness correction to the Casimir force at short separations: Contact distance and extreme value statistics
• Measurement of dispersive forces between evaporated metal surfaces in the range below 100 nm
• Influence of random roughness on the adhesion between metal surfaces due to capillary condensation
• Roughness correction to the Casimir force beyond perturbation theory
• The locality of surface interactions on colloidal probes

Cited by in corpus (4)

• The effect of patch potentials in Casimir force measurements determined by heterodyne Kelvin probe force microscopy
• Next generation design and prospects for CANNEX
• How to confirm and exclude different models of material properties in the Casimir effect
• The locality of surface interactions on colloidal probes