A bubble-assisted electroosmotic micropump for a delivery of a droplet in a microfluidic channel combined with a light-addressable potentiometric sensor

被引：18

作者：

Li, Xueliang ^{[1
,2
]}

Liu, Shibin ^{[1
]}

Fan, Pingping ^{[3
]}

Werner, Carl Frederik ^{[4
]}

Miyamoto, Ko-ichiro ^{[4
]}

Yoshinobu, Tatsuo ^{[2
,4
]}

机构：

[1] Northwestern Polytech Univ, Sch Elect & Informat, Xian 710072, Peoples R China

[2] Tohoku Univ, Dept Biomed Engn, Aoba Ku, 6-6-05 Aza Aoba, Sendai, Miyagi 9808579, Japan

[3] Henan Chem Technician Coll, Dept Chem, Kaifeng 475004, Peoples R China

[4] Tohoku Univ, Dept Elect Engn, Aoba Ku, 6-6-05 Aza Aoba, Sendai, Miyagi 9808579, Japan

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2017年 / 248卷

关键词：

Electroosmotic micropump; Light-addressable potentiometric sensor; Droplet; Microfluidics; ANODIC ALUMINA MEMBRANES; IMAGING SENSOR; HIGH-SPEED; PUMP; RESOLUTION; LAPS; POLY(DIMETHYLSILOXANE); SYSTEMS;

D O I：

10.1016/j.snb.2017.02.165

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A bubble-assisted electroosmotic (EO) micropump is proposed as a miniaturized actuating element to be integrated in a microfluidic chemical sensing system. In this device, a bubble is generated in a narrow channel to form a thin water sheet between the bubble and the wall. Due to the high surface-to-volume ratio of the water sheet, an efficient EO flow is realized at relatively low pumping voltages of 20-60 V without using a porous material. The direction and the flow rate of the EO flow depended on the polarity and the magnitude of the pumping voltage, and the highest flow rate of about +/- 500 pL/s was obtained at +/- 60 V. A bubble-assisted EO micropump was combined with a LAPS for measuring the pH value of a droplet with a volume of 1 nL. (C) 2017 Published by Elsevier B.V.

引用

页码：993 / 997

页数：5

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