Development of electrochemical biosensors as part of microfluidic sensing tools has gained significant attention because of the ease of compatibility between electrochemistry, small volumes of microfluidics and the small size and portability of the associated instrumentation. A major challenge in this field has been electrode fabrication. One solution is the use of carbon based electrode materials. Of these materials, carbon pastes are one of the most attractive because due to lower fouling, lower noise, and larger potential range compared to metal electrodes. A new fabrication method for CPEs based on screen-printing techniques using a mixture of PDMS and mineral oil as a binder to create electrodes on-chip will be presented. The mixture of oil and PDMS provides an improvement in electrode conductivity compared to PDMS alone. Modification of CPEs with multi-walled carbon nanotubes (CNT) and cobalt phthalocyanine (CoPC) for selective detection of catecholamines and thiols will also be presented.

Microfluidic electrochemical sensing using PDMS cross-linked carbon paste

242nd National Meeting (2011)

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