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首页> 外文期刊>ACS applied materials & interfaces >Nanotextured Surface on Flexographic Printed ZnO Thin Films for Low-Cost Non-Faradaic Biosensors
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Nanotextured Surface on Flexographic Printed ZnO Thin Films for Low-Cost Non-Faradaic Biosensors

机译：用于低成本非法拉第生物传感器的柔性版印刷ZnO薄膜上的纳米纹理表面

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摘要

In this work, the formation of a nanotextured surface is reported on flexographic printed zinc oxide thin films which provide an excellent platform for low-cost, highly sensitive biosensing applications. The ability to produce nanotextured surfaces using a high-throughput, roll-to-roll production method directly from precursor ink without any complicated processes is commercially attractive for biosensors that are suitable for large-scale screening of diseases at low cost. The zinc oxide thin film was formed by printing a zinc acetate precursor ink solution and annealing at 300 degrees C. An intricate nanotexturing of the film surface was achieved through 150 degrees C drying process between multiple prints. These surface nanostructures were found to be in the range of 100 to 700 nm in length with a width of 58 +/- 18 nm and a height of between 20 and 60 nm. Such structures significantly increase the surface area to volume ratio of the biosensing material, which is essential to high sensitivity detection of diseases. Nonfaradaic electrochemical impedance spectroscopy measurements were carried out to detect the pp65-antigen of the human cytomegalovirus using the printed device, which has a low limit of detection of 5 pg/mL.
机译：在这项工作中，据报道在柔性版印刷的氧化锌薄膜上形成了纳米纹理表面，这为低成本，高灵敏度的生物传感应用提供了极好的平台。使用高通量，卷对卷生产方法直接从前体油墨生产纳米结构化表面而无需任何复杂过程的能力，对于适合于低成本大规模筛查疾病的生物传感器，在商业上具有吸引力。氧化锌薄膜是通过印刷醋酸锌前体墨水溶液并在300摄氏度下退火而形成的。通过在多次印刷之间进行150摄氏度的干燥过程，可以实现薄膜表面的复杂纳米纹理化。发现这些表面纳米结构的长度为100至700nm，宽度为58 +/- 18nm，高度为20至60nm。这样的结构显着增加了生物传感材料的表面积与体积之比，这对于疾病的高灵敏度检测是必不可少的。使用印刷设备进行非法拉第电化学阻抗谱测量，以检测人巨细胞病毒的pp65抗原，其检测下限为5 pg / mL。

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