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Two type of devices suited for lab-on-a-chip applications were investigated. First, the integration of a polymeric microactuator deposited on top of carbon electrodes placed below a microfluidic channel. This actuator uses the out-of-plane strain of the polypyrrole/NaDBS (sodium dodecylbenzene sulfonate) system. The electrodeposition of polypyrrole on top of graphitic and carbon nanotube microelectrodes has been achieved. Secondly, the combination of an organic light emitting diode (OLED) with a microfuidic channel in order to build an integrated fluorescence detection system was also investigated.