Displacement Pumping of Liquids Radially Inward on Centrifugal Microfluidic Platforms in Motion

被引:20
|
作者
Kong, Matthew C. R. [1 ]
Bouchard, Adam P. [1 ]
Salin, Eric D. [1 ]
机构
[1] McGill Univ, Dept Chem, Montreal, PQ H3A 2K6, Canada
来源
MICROMACHINES | 2012年 / 3卷 / 01期
关键词
centrifugal; microfluidics; displacement; pumping; radially inward; SAMPLE PREPARATION; CD; DEVICES; DISK; LAB;
D O I
10.3390/mi3010001
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
We describe two novel centrifugal microfluidic platform designs that enable passive pumping of liquids radially inward while the platform is in motion. The first design uses an immiscible liquid to displace an aqueous solution back towards the center of the platform, while the second design uses an arbitrary pumping liquid with a volume of air between it and the solution being pumped. Both designs demonstrated the ability to effectively pump 55% to 60% of the solution radially inward at rotational frequencies as low as 400 rpm (6.7 Hz) to 700 rpm (11.7 Hz). The pumping operations reached completion within 120 s and 400 s respectively. These platform designs for passive pumping of liquids do not require moving parts or complex fabrication techniques. They offer great potential for increasing the number of sequential operations that can be performed on centrifugal microfluidic platforms, thereby reducing a fundamental limitation often associated with these platforms.
引用
收藏
页码:1 / 9
页数:9
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