Title :
Design and characterization of a micro single bubble actuator
Author :
Deng, P. ; Lee, Y.-K. ; Ping Cheng
Author_Institution :
Dept. of Mech. Eng., Hong Kong Univ. of Sci. & Technol., China
Abstract :
A novel micro bubble actuator of specially designed micro heater (10/spl times/3 /spl mu/m/sup 2/) and single bubble system was fabricated and tested in DI water and two common DNA buffers (20 mM Tris-HC1 and 1X TAE). Under pulse heating, this actuator can generate highly localized homogeneous boiling and produces single bubbles periodically. Due to the asymmetry cycle of the bubble growth and collapse periods, the flow field can be effectively perturbed. This unique characteristic can be used to promote such actions as mixing in micro-bio-analytical systems. The thermal and hydrodynamic characteristics of the perturbed flow generated by the bubble actuator are investigated in this paper.
Keywords :
boiling; bubbles; microactuators; microfluidics; DNA buffers; asymmetry cycle; bubble growth; flow field; hydrodynamic properties; localized homogeneous boiling; micro single bubble actuator; microbioanalytical systems; microbubble actuator; microheater; mixing; perturbed flow; pulse heating; thermal properties; Actuators; DNA; Fabrication; Gold; Heating; Mechanical engineering; Pulse generation; Temperature control; Thermal stresses; Visualization;
Conference_Titel :
TRANSDUCERS, Solid-State Sensors, Actuators and Microsystems, 12th International Conference on, 2003
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7731-1
DOI :
10.1109/SENSOR.2003.1215556
