Microfabricated capillarity-driven stop valve and sample injector

被引：92

作者：

Man, PF ^{[1
]}

Mastrangelo, CH ^{[1
]}

Burns, MA ^{[1
]}

Burke, DT ^{[1
]}

机构：

[1] Univ Michigan, Dept Elect Engn, Ctr Integrated Sensors & Circuits, Ann Arbor, MI 48109 USA

来源：

MICRO ELECTRO MECHANICAL SYSTEMS - IEEE ELEVENTH ANNUAL INTERNATIONAL WORKSHOP PROCEEDINGS | 1998年

关键词：

D O I：

10.1109/MEMSYS.1998.659727

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper presents the design, fabrication, and testing of passive plastic microfluidic valves and active injectors driven by capillary forces. The passive valves stop the flow of a liquid inside a capillary using a capillary pressure barrier that develops when the channel cross section changes abruptly. Two types of valves with vertical and horizontal neck regions were fabricated yielding pressure barriers ranging from 1-6 kPa. Introducting asymmetry in the neck region, unidirectional valving action was achieved. The passive valving devices were used in combination with two electrodes to implement a sample injector. The injector uses an electrolytically-generated O-2 bubble that raises the liquid pressure beyond the barrier thus reestablishing flow with as little as 150 mu W Of electrical power.

引用

页码：45 / 50

页数：4