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A microbubble-powered bioparticle actuator

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5 Author(s)
R. B. Maxwell ; Dept. of Mech. Eng., MIT, Cambridge, MA, USA ; A. L. Gerhardt ; M. Toner ; M. L. Gray
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We present the results of a device that uses controllable microbubble actuation to manipulate bioparticles. In order to create a useful device for controlling the position of bioparticles, predictable microfluidic actuation is crucial. The goal of this project was to develop fundamental technology that can be used to manipulate single bioparticles (e.g., cells). We use a thermal bubble actuation method to accomplish this goal. Microbubbles have the advantages of relatively simple electronics and fabrication but can be difficult to control. In this paper, we describe two specific accomplishments: the use of micromachined nucleation cavities to precisely localize thermal bubbles and to achieve controllable bubble formation temperatures and bubble dissipation and the demonstration of controllable microbubbles in a new device for particle sorting.

Published in:

Journal of Microelectromechanical Systems  (Volume:12 ,  Issue: 5 )