DEVICE FOR CONTROLLING PARTICLE DISTRIBUTION IN AN EVAPORATING DROPLET USING RADIAL ELECTROOSMOTIC FLOW

摘要

An apparatus for controlling particle distribution in an evaporating droplet using radial electroosmotic flow is provided to control the quantity and the radial direction of the radial electroosmotic flow by changing the intensity of and the polarity of a voltage applied. An apparatus for controlling particle distribution in an evaporating droplet using radial electroosmotic flow includes a first electric field forming electrode, a second electric field forming electrode, and a voltage applying device. The first electric field forming electrode is formed around the droplet including particles. The second electric field forming electrode is fixed on a substrate and is arranged in a center of the droplet to be insulated from the first electric field forming electrode. The voltage applying device applies an alternating current voltage and a direct current voltage at once. The radial electroosmotic flow is formed in a direction of the center of the droplet or in a direction around the droplet according to the property of the particle.