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 (29)

• New Developments in the Casimir Effect
• The Casimir force between real materials: experiment and theory
• Precise comparison of theory and new experiment for the Casimir force leads to stronger constraints on thermal quantum effects and long-range interactions
• Demonstration of the Lateral Casimir Force
• Control of the Casimir force by the modification of dielectric properties with light
• Complete roughness and conductivity corrections for the recent Casimir force measurement
• Halving the Casimir force with conductive oxides
• Experimental and Theoretical Investigation of the Lateral Casimir Force Between Corrugated Surfaces
• Wetting, roughness and flow boundary conditions
• Shear-dependent apparent slip on hydrophobic surfaces: The Mattress Model
• Theory confronts experiment in the Casimir force measurements: quantification of errors and precision
• Demonstration of the difference Casimir force for samples with different charge carrier densities
• Switching Casimir forces with Phase Change Materials
• Observation of the skin-depth effect on the Casimir force between metallic surfaces
• The Casimir force between rough metallic plates
• Roughness correction to the Casimir force : Beyond the Proximity Force Approximation
• Measurement of the gradient of the Casimir force between a nonmagnetic sphere and a magnetic plate
• No anomalous scaling in electrostatic calibrations for Casimir force measurements
• Surface Contact Potential Patches and Casimir Force Measurements
• Modeling electrostatic patch effects in Casimir force measurements
• Roughness correction to the Casimir force at short separations: Contact distance and extreme value statistics
• Random-roughness hydrodynamic boundary conditions
• Measurement of dispersive forces between evaporated metal surfaces in the range below 100 nm
• The distance upon contact: Determination from roughness profile
• Impact of surface imperfections on the Casimir force for lenses of centimeter-size curvature radii
• Influence of random roughness on the adhesion between metal surfaces due to capillary condensation
• On the control of the lateral Casimir force between corrugated surfaces
• Roughness correction to the Casimir force beyond perturbation theory
• The locality of surface interactions on colloidal probes

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• The effect of patch potentials in Casimir force measurements determined by heterodyne Kelvin probe force microscopy
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• How to confirm and exclude different models of material properties in the Casimir effect
• Sensitivity and accuracy of Casimir force measurements in air
• The locality of surface interactions on colloidal probes