Compatibility of organic solvents for electrochemical measurements in PDMS-based microfluidic devices

We have investigated the compatibility of some organic solvents commonly used in electrochemistry with microfluidic channels based on poly(dimethylsiloxane) (PDMS) and compared the stability of electrochemical measurements over several hours with how much PDMS swells when immersed in these solvents....

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Bibliographic Details
Published in:Microfluidics and nanofluidics 2016-09, Vol.20 (9), p.1, Article 127
Main Authors: Adamiak, W., Kałuża, D., Jönsson-Niedziolka, M.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Biomedical Engineering and Bioengineering
Electrochemistry
Engineering
Engineering Fluid Dynamics
Nanotechnology and Microengineering
Organic solvents
Research Paper
Solvents
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Summary:We have investigated the compatibility of some organic solvents commonly used in electrochemistry with microfluidic channels based on poly(dimethylsiloxane) (PDMS) and compared the stability of electrochemical measurements over several hours with how much PDMS swells when immersed in these solvents. Lee et al. (Anal Chem 75: 6544–6554. doi: 10.1021/ac0346712 , 2003 ) have shown that there is a good correlation between swelling of PDMS and the solubility parameter ( δ H ) of the various solvents and suggested that δ H can function as an indication of PDMS compatibility. We show that solvents with a very high swelling ratio can give stable voltammetry over several hours, and thus, we do not find that swelling is a good measure for compatibility with PDMS in electrochemical experiments.
ISSN:1613-4982
1613-4990
DOI:10.1007/s10404-016-1792-4