471940 A Quantitative Theory of Magnetic Janus Particle Assembly
We have carried out experiments that measure the assembly rate of the magJP chains. The particles are synthesized, confined to a 2D environment, placed in a magnetic field, and tracked as they assemble. Particle tracking software has been developed for the project, and has been used to collect information from the videos including: chain concentrations vs time, particle trajectories, and dipole-dipole interaction energy. The results are fit to the Smoluchowski coagulation equations to obtain rate constants for chain aggregation.
The talk will discuss the relevance of these rate equations. A theory is proposed for prediction of the magJP rate constants when varying: concentration, dipole strength, dipole shift, viscosity, and particle size. The theory is shown to predict the magJP rate constants and future experiments are proposed to further test the theory.