In this book, the authors discuss the control, manipulation and behavioural applications of microfluidics. Topics include dielectrophoresis based droplet microfluidic devices for on-chip bioassays; microfluidic biosensor systems for cell biology and drug discovery; controllable microfluidic generation of monodisperse multiple emulsion droplets; an alternative method to predict wettability for microfluidics; integration of capacitive micromachined ultrasound transducers to microfluidic devices; selection of easily accessible PCR-and bio-compatible materials for microfluidic chips; and electrokinetic manipulation of biomolecules.