Colloids Exposed to Random Potential Energy Landscapes: from Particle Number Density to Particle-Potential and Particle-Particle Interactions

Abstract

Colloidal particles were exposed to a random potential energy landscape (rPEL) that has been created optically via a speckle pattern. The mean particle density as well as the potential roughness, i.e. the disorder strength, were varied. The local probability density of the particles as well as its main characteristics were determined. For the first time, the disorder-averaged pair density correlation function and an analogue of the Edwards-Anderson order parameter, which quantifies the correlation of the mean local density among disorder realisations, were measured experimentally and shown to be consistent with replica liquid state theory results.

arXiv commentThe following article has been accepted by the Journal of Chemical Physics. After it is published, it will be found at http://scitation.aip.org/content/aip/journal/jcp

References in corpus (16)

• Anomalous transport in the crowded world of biological cells
• Fractal free energy landscapes in structural glasses
• The role of local structure in dynamical arrest
• Localization Transition of the Three-Dimensional Lorentz Model and Continuum Percolation
• Confocal microscopy of colloidal particles: towards reliable, optimum coordinates
• Tracking single particles on supported lipid membranes: multi-mobility diffusion and nanoscopic confinement
• Speckle Optical Tweezers: Micromanipulation with Random Light Fields
• Colloids in light fields: particle dynamics in random and periodic energy landscapes
• Particle dynamics in two-dimensional random energy landscapes - experiments and simulations
• Anomalous features of diffusion in corrugated potentials with spatial correlations: faster than normal, and other surprises
• Controlling dispersion forces between small particles with artificially created random light fields
• Nonlinear Ionic Conductivity of Thin Solid Electrolyte Samples: Comparison between Theory and Experiment
• Colloidal suspensions in modulated light fields
• Experimental creation and characterization of random potential energy landscapes exploiting speckle patterns
• Probing Disordered Substrates by Imaging the Adsorbate in its Fluid Phase
• Phase diagram of vortex matter in layered superconductors with random point pinning

Cited by in corpus (5)

• Active Brownian and inertial particles in disordered environments: short-time expansion of the mean-square displacement
• Translationally invariant colloidal crystal templates
• Dynamics of fluids in quenched-random potential energy landscapes: a mode-coupling theory approach
• Orientational correlations in fluids with quenched disorder
• Dynamics of a noninteracting colloidal fluid in a quenched Gaussian random potential: A time-reversal-symmetry-preserving field-theoretic approach