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A Programmable Array for Contact-Free Manipulation of Floating Droplets on Featureless Substrates by the Modulation of Surface Tension
2009
Journal of microelectromechanical systems
This paper presents a contactless droplet manipulation system that relies on thermally generated Marangoni flows. Programmable 2-D control of aqueous microdroplets suspended in an oil film on a plain featureless glass substrate is achieved using a 128-pixel heater array suspended 100-500 μm above the oil layer. The heaters generate surface temperature perturbations (< 25 • C), resulting in local Marangoni flows that can move droplets in either a push or a pull mode. Programmed movement is
doi:10.1109/jmems.2009.2029961
fatcat:suhdw7bmmvdedbbgepa7wjdwsm