Acoustic heating and thermometry in microfluidic channels

Author

Jagannathan, H. ; Yaralioglu, G.G. ; Ergun, A.S. ; Khuri-Yakub, B.T.

Author_Institution

Edward L. Ginzton Lab., Stanford Univ., CA, USA

fYear

2003

fDate

19-23 Jan. 2003

Firstpage

474

Lastpage

477

Abstract

This paper presents the results of the work performed in establishing closed loop temperature control of fluids in microfluidic channels. Acoustic energy is used to introduce heat into localized regions of the channel. The temperature of the fluid in these regions is determined by using the relationship between the attenuation and speed of sound propagating in the fluid with temperature. The above two operations of heating and temperature measurement when used in unison serve as a very powerful tool in microfluidics. The system requires milli-watts of power for heating and has a temperature measurement accuracy of 0.1 degrees.

Keywords

acoustic wave absorption; acoustic wave effects; acoustic wave velocity; heat measurement; microfluidics; temperature measurement; acoustic energy; acoustic heating; acoustic wave attenuation; closed loop temperature control; microfluidic channels; speed of sound; thermometry; Biomembranes; Electrodes; Frequency; Heating; Microfluidics; Piezoelectric transducers; Temperature control; Temperature measurement; Ultrasonic imaging; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Micro Electro Mechanical Systems, 2003. MEMS-03 Kyoto. IEEE The Sixteenth Annual International Conference on

ISSN

1084-6999

Print_ISBN

0-7803-7744-3

Type

conf

DOI

10.1109/MEMSYS.2003.1189789

Filename

1189789