(552i) Studying the Orientation of a Janus Particle Near a Wall Under Varying Flow Conditions
AIChE Annual Meeting
Wednesday, October 31, 2018 - 5:30pm to 5:45pm
Colloidal particles with directional interactions have been the subject of growing interest in the soft matter field. The interest stems from the potential that directional interactions might be a useful tool to engineer the self-assembly behavior or phase diagram in a dense system of particles. A simple way to achieve biased interactions between two particles and/or a particle and a wall, is to fabricate anisotropic particles such as Janus particles by creating a patch that covers 50% of the particle surface. In this context, motivated by the biased interaction between a Janus particle and a wall, we aim to study the impact of this interaction on the orientation of a Janus particle near a wall under varying flow conditions. We have experimentally fabricated Janus particles and studied their orientation near a wall with and without flow and observed different preferential orientation as a function of flow. In order to better understand the interaction between the particle and the wall and its impact on particle orientation, we will employ the Kern-Frankel model, which is frequently used in colloidal systems to describe the directional interaction between colloids and surfaces, in Brownian Dynamics simulations.