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

Volume

1

fYear

2003

Firstpage

647

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/SENSOR.2003.1215556

Filename

1215556