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首页> 美国卫生研究院文献>Micromachines >Parallel Droplet Deposition via a Superhydrophobic Plate with Integrated Heater and Temperature Sensors
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Parallel Droplet Deposition via a Superhydrophobic Plate with Integrated Heater and Temperature Sensors

机译：通过集成了加热器和温度传感器的超疏水板进行平行液滴沉积

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摘要

A simple setup, which is suitable for parallel deposition of homogenous liquids with a precise volume (dosage), is presented. First, liquid is dispensed as an array of droplets onto a superhydrophobic dosage plate, featuring a 3 × 3 array of holes. The droplets rest on these holes and evaporate with time until they are small enough to pass through them to be used on the final target, where a precise amount of liquid is required. The system can be fabricated easily and operates in a highly parallel manner. The design of the superhydrophobic dosage plate can be adjusted, in terms of the hole positions and sizes, in order to meet different specifications. This makes the proposed system extremely flexible. The initial dispensed droplet mass is not significant, as the dosing takes place during the evaporation process, where the dosage is determined by the hole diameter. In order to speed up the evaporation process, microheaters are screen printed on the back side of the dosage plate. To characterize the temperature distribution caused by the microheaters, temperature sensors are screen printed on the top side of the dosage plate as well. Experimental data regarding the temperature sensors, the microheaters, and the performance of the setup are presented, and the improvement due to the heating of the dosage plate is assessed. A significant reduction of the total evaporation time due to the microheaters was observed. The improvement caused by the temperature increase was found to follow a power law. At a substrate temperature of 80 °C, the total evaporation time was reduced by about 79%.
机译：提出了一种简单的设置，适用于以精确的体积（剂量）平行沉积均匀的液体。首先，将液体以液滴阵列的形式分配到具有3×3阵列孔的超疏水剂量板上。液滴停留在这些孔上并随着时间的流逝蒸发，直到它们足够小以通过它们以用于需要精确量液体的最终目标。该系统可以容易地制造并且可以高度并行地操作。可以根据孔的位置和大小来调节超疏水剂量板的设计，以满足不同的规格。这使得所提出的系统极其灵活。最初分配的液滴质量并不重要，因为剂量是在蒸发过程中进行的，其中剂量由孔径决定。为了加快蒸发过程，将微量加热器丝网印刷在剂量板的背面。为了表征由微加热器引起的温度分布，温度传感器也丝网印刷在剂量板的顶部。给出了有关温度传感器，微型加热器和装置性能的实验数据，并评估了由于剂量板加热引起的改进。观察到由于微加热器，总蒸发时间显着减少。发现由温度升高引起的改善遵循幂定律。在80°C的基板温度下，总蒸发时间减少了约79％。

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