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Issue 15, 2019
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Polycaprolactone-enabled sealing and carbon composite electrode integration into electrochemical microfluidics

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Abstract

Combining electrochemistry with microfluidics is attractive for a wide array of applications including multiplexing, automation, and high-throughput screening. Electrochemical instrumentation also has the advantage of being low-cost and can enable high analyte sensitivity. For many electrochemical microfluidic applications, carbon electrodes are more desirable than noble metals because they are resistant to fouling, have high activity, and large electrochemical solvent windows. At present, fabrication of electrochemical microfluidic devices bearing integrated carbon electrodes remains a challenge. Here, a new system for integrating polycaprolactone (PCL) and carbon composite electrodes into microfluidics is presented. The PCL : carbon composites have excellent electrochemical activity towards a wide range of analytes as well as high electrical conductivity (∼1000 S m−1). The new system utilizes a laser cutter for fast, simple fabrication of microfluidics using PCL as a bonding layer. As a proof-of-concept application, oil-in-water and water-in-oil droplets are electrochemically analysed. Small-scale electrochemical organic synthesis for TEMPO mediated alcohol oxidation is also demonstrated.

Graphical abstract: Polycaprolactone-enabled sealing and carbon composite electrode integration into electrochemical microfluidics

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Publication details

The article was received on 30 Apr 2019, accepted on 20 Jun 2019 and first published on 21 Jun 2019


Article type: Paper
DOI: 10.1039/C9LC00417C
Lab Chip, 2019,19, 2589-2597

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    Polycaprolactone-enabled sealing and carbon composite electrode integration into electrochemical microfluidics

    K. J. Klunder, K. M. Clark, C. McCord, K. E. Berg, S. D. Minteer and C. S. Henry, Lab Chip, 2019, 19, 2589
    DOI: 10.1039/C9LC00417C

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