@article { Bazargan2010a, title = {Flow control using a thermally actuated microfluidic relay valve}, journal = {Journal of Microelectromechanical Systems }, volume = {19}, year = {2010}, month = {10/2010}, pages = {1079-1087}, publisher = {ASME/IEEE}, abstract = {This work demonstrates a new 2-stage valving concept for microfluidic systems that uses the reversible gelation of a thermally responsive polymer solution in a control channel to deflect a membrane into the main flow channel for flow control. This method can control flow through a system of microchannels using integrated electric heating elements and only one control pressure source, compared to the off-chip pressure manifold needed in existing systems. This valve technology therefore enables portable microfluidics-based diagnostics tools for biomedical applications and environmental monitoring allowing on-site analysis. Valves with zero leakage rates and a response time of about 3 seconds have been achieved.}, URL = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5575368}, author = {V. Bazargan and B. Stoeber} }