1. Dept. of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process TechnologyEindhoven University of Technology, P.O. Box 513Eindhoven MB 5600 the Netherlands
2. FUJIFILM Manufacturing Europe, Tilburg Research Labs, B.V, P.O. Box 90156Tilburg the Netherlands
3. Dept. of Applied PhysicsEindhoven University of Technology, P.O. Box 513Eindhoven MB 5600 the Netherlands
4. School of Marine Science and EngineeringHebei University of TechnologyTianjin 300130 China