Active particles that transform energy into directed or persistent motion show collective behavior and self-organization. One type of self-organization is in the form of crystal structures. However...Show moreActive particles that transform energy into directed or persistent motion show collective behavior and self-organization. One type of self-organization is in the form of crystal structures. However, an active crystal with tunable properties has not been achieved. Inspired by an experiment in which vibrated polar discs form ordered domains, and an experiment in which metallic spheres, that move by contact charge electrophoresis, form a passive crystal, we create active particles in the shape of a cylinder composed of a metallic and a dielectric part, that move thanks to Quincke rotation on the dielectric side and an electrostatic force on the metallic side due to an external electric field. We study the behavior of these particles by characterizing the persistence of their motion, their ability to repel each other, and by studying their instantaneous speed as a function of the electric field and their size. Our results suggest that the particles have the potential to form an active crystal and seem to be compatible with the passive crystal existent at our lab.Show less
Active crystals are a relatively unexplored type of active matter, which could potentially allow for a completely new class of materials. This thesis proposes a system consisting of stainless steel...Show moreActive crystals are a relatively unexplored type of active matter, which could potentially allow for a completely new class of materials. This thesis proposes a system consisting of stainless steel beads in a low-conducting solution of AOT in hexadecane in between two electrodes, to which a high voltage is applied. It presents both theoretical and experimental results for a single bead, showing a voltage range exist for which the beads bounce without reaching the top electrode. These results are used to create a stable bouncing crystal of which the interplay between rigidity and diffusivity is studied. Lastly, this thesis provides suggestions on how to develop the bouncing crystal system further to achieve an active crystal.Show less
