Motivation: Nano- and Microfluidics Microfluidic networks Tabelling, Introduction to Microfluidics, Oxford (2005) Physics of flows at the nano-scale Simple and complex fluids Qualitatively different behavior as compared to macroscopic flows Understand natural "microdevices" Lab-on-a-chip technology Long term goal: automation of complex chemical and biological processes Terray et al. Science 296:1841 (2002) Droplet generation Soft lithography: PDMS channels Duffy et al. Anal. Chem. 70:4974 (1998) Squires & Quake, Rev. Mod. Phys. 77:977 (2005)