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Mechanical Engineering Commons

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University of South Florida

Graduate Theses and Dissertations

EWOD

Articles 1 - 2 of 2

Full-Text Articles in Mechanical Engineering

Droplet-Based Mechanical Actuator Utilizing Electrowetting Effect, Qi Ni Jun 2016

Droplet-Based Mechanical Actuator Utilizing Electrowetting Effect, Qi Ni

Graduate Theses and Dissertations

The goal of this work is to quantify the key design parameters such as the load capacity, actuation force, positioning repeatability, and reliability for droplet-based electrowetting actuators. Due to the fact that surface tension dominates gravity at both the mesoscale and microscale, droplet-based actuators can provide adequate force in manipulation tasks at those scales. Electrowetting, which uses an electric field to modulate the apparent surface tension of the liquid-ambient, provides a method to actuate droplets, which in turn transports the object carried by the droplet.

Most previous electrowetting actuation efforts have concentrated on manipulating droplets in a closed two-plate configuration ...


Continuous Electrowetting Actuation Utilizing Current Rectification Properties Of Valve Metal Films, Corey Lynch Dec 2010

Continuous Electrowetting Actuation Utilizing Current Rectification Properties Of Valve Metal Films, Corey Lynch

Graduate Theses and Dissertations

Electrowetting on dielectric (EWOD) is a technique for reducing the apparent contact angle of a fluid droplet, which has many promising applications in the fields of optics, digital displays, and lab-on-a-chip research. In this thesis, a design is presented for a novel single circuit device for achieving continuous droplet motion, by using the current-rectifying properties of valve metals to create diode-like behavior. This contrasts with existing designs, which require an array of individual electrodes to achieve motion in discrete steps. We are able to demonstrate continuous droplet motion across a 28mm-long test strip with an applied voltage of 303 V ...