Microfluidic Droplet Array as Optical Irises Actuated via Electrowetting
Microfluidic Droplet Array as Optical Irises Actuated via Electrowetting
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DOI：
10.1155/2018/1262947
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发表时间：
2018-01-01
影响因子：
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通讯作者：
Fouckhardt, Henning
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文献类型：
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作者：
Strassner, Johannes;Heisel, Carina;Fouckhardt, Henning
由可调谐微光学任务发起，但不限于此应用，提出了具有 3 x 3 子单元和通过电润湿进行液滴驱动的直立模块中的微流体液滴阵列。每个子细胞都充满一个（当然是透明的）水滴，充当可移动的虹膜，周围环绕着不透明的黑色癸烷。每个子单元的尺寸为 1 x 1 mm(2)，并包含 2 x 2 个二次排列的液滴位置。所有 3 x 3 液滴均通过电介质电润湿 (EWOD) 同步驱动。 130V (V-rms) 下，液滴速度高达 12 mm/s，响应时间约为 40 ms。最低工作电压为30V。演示了液滴的水平和垂直运动。此外，对子单元的微小修改使我们能够利用每个液滴的扁平化。因此，不透明的癸烷流体样品可以覆盖每个水滴并使每个子单元不透明，从而产生具有恒定开口直径的可切换虹膜。该概念不需要任何机械移动部件或外部泵。
Initiated by a task in tunable microoptics, but not limited to this application, a microfluidic droplet array in an upright standing module with 3 x 3 subcells and droplet actuation via electrowetting is presented. Each subcell is filled with a single (of course transparent) water droplet, serving as amovable iris, surrounded by opaque blackened decane. Each subcell measures 1 x 1 mm(2) and incorporates 2 x 2 quadratically arranged positions for the droplet. All 3 x 3 droplets are actuated synchronously by electrowetting on dielectric (EWOD). The droplet speed is up to 12 mm/s at 130V (V-rms) with response times of about 40 ms. Minimum operating voltage is 30V. Horizontal and vertical movement of the droplets is demonstrated. Furthermore, a minor modification of the subcells allows us to exploit the flattening of each droplet. Hence, the opaque decane fluid sample can cover each water droplet and render each subcell opaque, resulting in switchable irises of constant opening diameter. The concept does not require any mechanically moving parts or external pumps.