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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 isdoi:10.1109/jmems.2009.2029961 fatcat:suhdw7bmmvdedbbgepa7wjdwsm