An active molecule delivery system whereby active molecules can be released on demand and/or a variety of different active molecules can be delivered from the same system and/or different concentrations of active molecules can be delivered from the same system. The active delivery system includes a plurality of microcells, wherein the microcells are filled with a medium for delivering the active molecules. In some embodiments the medium includes active molecules dispersed in a first charged phase as well as a second phase that is oppositely charged or uncharged and immiscible with the first phase. Where the medium includes a charged first phase, the first phase can be moved adjacent to, or away from, the porous diffusion layer in order to control the rate of delivery.一種活性分子遞送系統，藉其可隨選釋放活性分子及/或可從同一系統遞送各種不同的活性分子及/或可從同一系統遞送濃度不同的活性分子。該活性分子遞送系統包括複數個微胞，其中該微胞被填充遞送活性分子之介質。在一些具體實施例中，該介質包括活性分子分散於第一帶電相、及電荷相反或不帶電且不與第一相溶混的第二相。若該介質包括帶電第一相，則為了控制遞送速率，可將第一相移動而鄰近或離開多孔性擴散層。
