Characterization of Inkjet-Printed Digital Microfluidics Devices.

Characterization of Inkjet-Printed Digital Microfluidics Devices.
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喷墨打印数字微流控设备的特性。

DOI:
10.3390/s21093064
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发表时间:
2021-04-28
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
Novosselov IV
Novosselov IV
中科院分区:
其他
文献类型:
--
作者:
Chen S;He Z;Choi S;Novosselov IV

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数字微流体(DMF)设备能够精确操纵小液体体积的点护理测试。印刷电路板(PCB)衬底通常用于构建DMF器件。然而,喷墨打印可用于制造DMF电路,为基于pcb的DMF设计提供了更便宜的替代方案,同时实现了更快的设计迭代周期。我们演示了一种低成本喷墨印刷DMF电路的无洁净室制造工艺。我们通过测量驱动频率范围内的最小液滴驱动电压来比较Kapton和聚甲基丙烯酸甲酯(PMMA)作为介质涂层。当PMMA层厚度为0.2 μm,疏水层厚度为0.17 μm时,液滴运动所需的驱动电压最小为5.6 V。在10 V以上的驱动电压下,观察到PMMA介电击穿的显著问题。相比之下,即使在高达100 V的驱动电压下,使用Kapton的设备也更加坚固。
Digital microfluidics (DMF) devices enable precise manipulation of small liquid volumes in point-of-care testing. A printed circuit board (PCB) substrate is commonly utilized to build DMF devices. However, inkjet printing can be used to fabricate DMF circuits, providing a less expensive alternative to PCB-based DMF designs while enabling more rapid design iteration cycles. We demonstrate the cleanroom-free fabrication process of a low-cost inkjet-printed DMF circuit. We compare Kapton and polymethyl methacrylate (PMMA) as dielectric coatings by measuring the minimal droplet actuation voltage for a range of actuation frequencies. A minimum actuation voltage of 5.6 V was required for droplet movement with the PMMA layer thickness of 0.2 μm and a hydrophobic layer of 0.17 μm. Significant issues with PMMA dielectric breakdown were observed at actuation voltages above 10 V. In comparison, devices that utilized Kapton were found to be more robust, even at an actuation voltage up to 100 V.
DOI: 10.3390/mi11121113
发表时间: 2020-12-16
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影响因子: 3.4
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