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首页> 外文期刊>Electroanalysis >Investigation of airbrushing for fabricating microelectrodes in microfluidic devices
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Investigation of airbrushing for fabricating microelectrodes in microfluidic devices

机译：用于在微流体装置中制造微电极的喷枪研究

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We report fabrication of microelectrodes by airbrushing, a technique primarily used for commercial arts. Similar to screen-printing, airbrushing enables conductive inks to be patterned onto a thin film. The film with ink electrodes is then laminated with a plastic substrate with microchannels to form a microfluidic device. The device is designed to implement enzyme-catalyzed electrochemical detection for sensing hydrogen. We found that airbrushed electrodes perform in a similar fashion with screen-printed electrodes. The cyclic voltammetric peak separation for ferrocyanide is 0.34 V, suggesting a nonreversible redox behavior as observed for the screen-printed ink electrodes. A linear calibration curve is obtained for 2 to 20 mM ferrocyanide in a flow using chronoamperometry, which is the method we previously exploited for demonstrating enzyme-catalyzed electrochemical detection in a large flow cell. The process parameters of airbrushing, including ink concentration, have been characterized. The benefits of fabricating electrodes by airbrushing include a simpler process, lower cost, and requiring less skill. This technique is especially useful in situations where a commercial screen-printing machine is inaccessible.
机译：我们报告通过喷枪制造微电极，喷枪是一种主要用于商业艺术的技术。与丝网印刷相似，喷枪可以将导电油墨图案化到薄膜上。然后将具有墨电极的膜与具有微通道的塑料基板层压在一起，以形成微流体装置。该设备旨在实现酶催化的电化学检测，以检测氢。我们发现喷枪电极的性能与丝网印刷电极相似。亚铁氰化物的循环伏安峰分离为0.34 V，表明丝网印刷油墨电极观察到不可逆的氧化还原行为。使用计时安培法在流动中获得2至20 mM亚铁氰化物的线性校准曲线，这是我们先前用于证明大型流通池中酶催化电化学检测的方法。已经表征了喷枪的工艺参数，包括墨水浓度。通过喷枪制造电极的好处包括更简单的工艺，更低的成本以及更少的技能。该技术在无法使用商用丝网印刷机的情况下特别有用。

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