Figure 2.

(a) Fabrication process of Janus particles. Silica particles were deposited from an aqueous suspension to form a sub-monolayer on a glass substrate, followed by E-beam metal evaporation deposition of Ni and Au. (b) On the left is a cartoon showing the shape and geometry of resultant Janus particles, and on the right is a scanning electron microscope (SEM) micrograph of actual particles. (c) A depiction of a trapped Janus particle in the sample chamber. The directions of the particle’s motion, the E and B fields, are shown relative to the sample chamber.