[ASME ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting - Chicago, Illinois, USA (Sunday 3 August 2014)] ASME 2014 12th International Conference on Nanochannels, Microchannels and Minichannels - A New Diffuser/Nozzle Structure With Extended Sidewalls for Maximising the Valveless Micropump Performance