Thermophoretic separation in microfluidics

被引：37

作者：

Geelhoed, P. F. ^{[1
]}

Lindken, R. ^{[1
]}

Westerweel, J. ^{[1
]}

机构：

[1] Delft Univ Technol, Lab Aero & Hydrodynam, NL-2628 CA Delft, Netherlands

来源：

CHEMICAL ENGINEERING RESEARCH & DESIGN | 2006年 / 84卷 / A5期

关键词：

thermophoresis; Soret-effect; microfluidics; lab-on-a-chip; separation;

D O I：

10.1205/cherd05012

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

W e present a particle separator that works on micro scales and that can be implemented on-chip. The working principle is based on the motion of particles or species in thermal gradients, the so called thermophoresis. A study of the feasibility of thermophoretic separation in microfluidics has been conducted. The efficiency of separation is observed by particle imaging. An integrated thermophoretic separator has been micro fabricated in silicon. Tests show that separation of 83% of the particles can be achieved in 100 s, using only 1 W of electrical power. Separation appears to be an order of magnitude faster than predicted. This separator will serve as a micro laboratory to further investigate the thermophoretic separation.

引用

页码：370 / 373

页数：4

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