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Manufacturing a nanowire-based sensing system via flow-guided assembly in a microchannel array template

机译：通过微通道阵列模板中的导流组件制造基于纳米线的传感系统

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摘要

A novel flow-guided assembly approach is presented to accurately align and position nanowire arrays in pre-defined locations with high throughput and large-scale manufacturing capability. In this approach, a polymer solution is first filled in an array of microfluidic channels. Then a gas flow is introduced to blow out most of the solution while pushing a little leftover against the channel wall for assembly into polymer nanowires. In this way, highly ordered nanowires are conveniently aligned in the flow direction and patterned along both sides of the microchannels. In this study, we demonstrated this flow-guided assembly process by producing millimetre-long nanowires across a 5 x 12 mm area in the same orientation and with basic 'I-shape', 'T-shape', and 'cross' patterns. The assembled polymer nanowires were further converted to conductive carbon nanowires through a standard carbonization process. After being integrated into electronic sensors, high sensitivity was found in model protein sensing tests. This new nanowire manufacturing approach is anticipated to open new doors to the fabrication of nanowire-based sensing systems and serve as good manufacturing practice for its simplicity, low cost, alignment reliability, and high throughput.
机译：提出了一种新颖的流引导组装方法，以高吞吐量和大规模制造能力将纳米线阵列精确对准和定位在预定位置。在这种方法中，首先将聚合物溶液填充到微流体通道阵列中。然后引入气流以吹出大部分溶液，同时将少许残留物推向通道壁，以组装成聚合物纳米线。以此方式，高度有序的纳米线在流动方向上方便地对准并且沿着微通道的两侧图案化。在这项研究中，我们通过以相同的方向并具有基本的“ I形”，“ T形”和“十字”图案在5 x 12 mm的面积上生产毫米级的纳米线，从而证明了这种导流装配过程。通过标准碳化工艺将组装好的聚合物纳米线进一步转化为导电碳纳米线。集成到电子传感器后，在模型蛋白质传感测试中发现了高灵敏度。预计这种新的纳米线制造方法将为基于纳米线的传感系统的制造打开新的大门，并因其简单，低成本，对准可靠性和高通量而成为良好的制造实践。

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