Acknowledgements The authors acknowledge the financial support provided by the Hong Kong Research Grants Council Grant No. HKUST604710, 605411 and National Natural Science Foundation of China (Grant No. 11290165). This publication is based on work partially supported by Award No. SA-C0040/UK-C0016 made by King Abdullah University of Science and Technology (KAUST). References 1. Fletcher P, Haswell S, Zhang X: Electrokinetic control of a chemical reaction in a lab-on-a-chip micro-reactor: measurement and quantitative modelling. Lab on a Chip 2002, Smoothened Agonist mouse 2:102–112.CrossRef 2. de Mello AJ: Control and detection of chemical reactions in microfluidic systems.

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