Title :
Liquid handling using expandable microspheres
Author :
Griss, P. ; Andersson, Hakan ; Stemme, G.
Author_Institution :
Dept. of Signals, Sensors & Syst., R. Inst. of Technol., Stockholm, Sweden
Abstract :
In this study we introduce two novel concepts for fluid handling in microfluidic systems and show their realization in micromachined test structures: a one-shot micropump and a normally open one-shot valve. Both principles use Expancel/spl reg/ microspheres, which are small spherical plastic particles that, when heated, increase their volume by a factor of about 60. The expansion is irreversible, i.e. when cooled again, the expandable microspheres do not shrink.
Keywords :
materials handling; microactuators; microfluidics; micropumps; microvalves; thermal expansion; Expancel microspheres; expandable microspheres; fluid handling; irreversible thermal expansion; microfluidic systems; micromachined test structures; normally open one-shot valve; one-shot micropump; one-shot unidirectional liquid actuator; small spherical plastic particles; Actuators; Hydrocarbons; Liquids; Microfluidics; Micropumps; Plastics; Pumps; Temperature distribution; Testing; Valves;
Conference_Titel :
Micro Electro Mechanical Systems, 2002. The Fifteenth IEEE International Conference on
Conference_Location :
Las Vegas, NV, USA
Print_ISBN :
0-7803-7185-2
DOI :
10.1109/MEMSYS.2002.984218
