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On a Highly Reproducible, Broadband Nanocomposite Ultrasonic Film Sensor Fabricated by Ultrasonic Atomization‐Assisted Spray Coating
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-06-10 , DOI: 10.1002/adem.202000462
Ruiqi Guan 1 , Fangxin Zou 1 , Zengsheng Weng 1 , Pengyu Zhou 2 , Yaozhong Liao 2 , Zhongqing Su 2 , Lin Huang 3
Affiliation  

Owing to their physical flexibilities and high sensitivities to dynamic strains, nanocomposite film sensors are explored extensively to achieve condition monitoring of engineering structures. However, the existing nanocomposite sensors for acquiring ultrasonic waves struggle to attain wide applications due to their notably low reproducibility and consequent poor stabilities in sensitivity. Herein, a highly reproducible carbon black/polyvinylpyrrolidone nanocomposite ultrasonic sensor is fabricated by ultrasonic atomization‐assisted spray coating. To maximize sensitivity and stability, the spraying ink is carefully designed, and the spray coating process is systematically optimized, resulting in a precisely controlled fabrication process, which warrants a high uniformity in the coalescence of sensor films and in the establishment of quantum tunneling networks inside sensors. Benefitted from an even distribution of quantum tunneling paths, the piezoresistive nanostructure of the proposed sensor exhibits an exceptional sensitivity to ultrasonic waves over a broad frequency bandwidth of up to 500 kHz. Also, both the sensitivity and the stability of the proposed sensor outperform those of sensors that are fabricated by other reported forming techniques. The superior reproducibility of the sensor is crucial to promoting it to real‐world applications.

中文翻译:

超声雾化辅助喷涂制备的高度可复制的宽带纳米复合超声薄膜传感器

由于其物理柔韧性和对动态应变的高度敏感性,人们广泛探索了纳米复合膜传感器以实现对工程结构的状态监测。然而,现有的用于捕获超声波的纳米复合传感器由于其显着的低再现性以及随之而来的敏感性差而难以获得广泛的应用。在此,通过超声雾化辅助喷涂制备了可重复生产的炭黑/聚乙烯吡咯烷酮纳米复合超声传感器。为了最大程度地提高灵敏度和稳定性,精心设计了喷涂油墨,并系统地优化了喷涂工艺,从而精确控制了制造过程,这保证了传感器膜的聚结和传感器内部量子隧道网络的高度均匀性。受益于量子隧穿路径的均匀分布,所提出的传感器的压阻纳米结构在高达500 kHz的宽频率带宽上对超声波表现出出色的灵敏度。而且,所提出的传感器的灵敏度和稳定性都优于通过其他报道的成形技术制造的传感器。传感器的出色再现性对于将其推广到实际应用至关重要。所提出的传感器的压阻纳米结构在高达500 kHz的宽频带宽上表现出对超声波的出色灵敏度。而且,所提出的传感器的灵敏度和稳定性都优于通过其他报道的成形技术制造的传感器。传感器的出色再现性对于将其推广到实际应用至关重要。所提出的传感器的压阻纳米结构在高达500 kHz的宽频带宽上表现出对超声波的出色灵敏度。而且,所提出的传感器的灵敏度和稳定性都优于通过其他报道的成形技术制造的传感器。传感器的卓越再现性对于将其推广到实际应用至关重要。
更新日期:2020-06-10
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