Ultra-fast quenching of binary colloidal suspensions in an external magnetic field

Abstract

An ultra-fast quench is applied to binary mixtures of superparamagnetic colloidal particles confined at a two-dimensional water-air interface by a sudden increase of an external magnetic field. This quench realizes a virtually instantaneous cooling which is impossible in molecular systems. Using real-space experiments, the relaxation behavior after the quench is explored. Local crystallites with triangular and square symmetry are formed on different time scales and the correlation peak amplitude of the small particles evolves nonmonotonically in time in agreement with Brownian dynamics computer simulations.

4 pages, 4 figures

References in corpus (6)

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Cited by in corpus (19)

• The Physics of the Colloidal Glass Transition
• The role of local structure in dynamical arrest
• The experimental realization of a two-dimensional colloidal model system
• Slow dynamics in a quasi-two-dimensional binary complex plasma
• Formation of metastable phases by spinodal decomposition
• Dynamics of two-dimensional complex plasmas in a magnetic field
• Controlled assembly of single colloidal crystals using electro-osmotic micro-pumps
• Introduction to colloidal dispersions in external fields
• The role of quench rate in colloidal gels
• Direct Imaging of Contacts and Forces in Colloidal Gels
• Microscopic approach to entropy production
• Soft repulsive mixtures under gravity: brazil-nut effect, depletion bubbles, boundary layering, nonequilibrium shaking
• Two-dimensional colloidal mixtures in magnetic and gravitational fields
• How does a thermal binary crystal break under shear?
• Microstructural diversity, nucleation paths and phase behaviour in binary mixtures of charged colloidal spheres
• Cybloids $-$ Creation and Control of Cybernetic Colloids
• Viscosity of a sheared correlated (near-critical) model fluid in confinement
• Characterizing structural features of two-dimensional particle systems through Voronoi topology
• Disordering two-dimensional magnet-particle configurations using bidispersity