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

Xueliang Li, Shibin Liu, Pingping Fan, Carl Frederik Werner, Ko ichiro Miyamoto, Tatsuo Yoshinobu

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)993-997
Number of pages5
JournalSensors and Actuators, B: Chemical
Volume248
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • Droplet
  • Electroosmotic micropump
  • Light-addressable potentiometric sensor
  • Microfluidics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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