A hydrophilic polymer based microfluidic system with planar patch clamp electrode array for electrophysiological measurement from cells

Bao Jian Xu, Wei Wei Ye, Yu Zhang, Jing Yu Shi, Chun Yu Chan, Xiao Qiang Yao, Mo Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

This paper presents a microfluidic planar patch clamp system based on a hydrophilic polymer poly(ethylene glycol) diacrylate (PEGDA) for whole cell current recording. The whole chip is fabricated by UV-assisted molding method for both microfluidic channel structure and planar electrode partition. This hydrophilic patch clamp chip has demonstrated a relatively high gigaseal success rate of 44% without surface modification compared with PDMS based patch clamp devices. This chip also shows a capability of rapid intracellular and extracellular solution exchange with high stability of gigaseals. The capillary flow kinetic experiments demonstrate that the flow rates of PEGDA microfluidic channels are around two orders of magnitude greater than those for PDMS-glass channels with the same channel dimensions. This hydrophilic polymer based patch clamp chips have significant advantages over current PDMS elastomer based systems such as no need for surface modification, much higher success rate of cell gigaseals and rapid solution exchange with stable cell gigaseals. Our results indicate the potential of these devices to serve as useful tools for pharmaceutical screening and biosensing tasks.
Original languageEnglish
Pages (from-to)187-192
Number of pages6
JournalBiosensors and Bioelectronics
Volume53
DOIs
Publication statusPublished - 5 Mar 2014

Keywords

  • Biosensing
  • Hydrophilic polymer
  • Patch clamp
  • Rapid solution exchange

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Biomedical Engineering
  • Electrochemistry

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