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首页> 外文期刊>Japanese journal of applied physics >Enhanced Sensitivity Of Wireless Chemical Sensor Based On Love Wave Mode
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Enhanced Sensitivity Of Wireless Chemical Sensor Based On Love Wave Mode

机译:基于Love Wave模式的无线化学传感器增强的灵敏度

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A 440 MHz wireless and passive Love-wave-based chemical sensor was developed for CO_2 detection. The developed device was composed of a reflective delay line patterned on 41° YX LiNbO_3 piezoelectric substrate, a poly(methyl methacrylate) (PMMA) waveguide layer, and Teflon AF 2400 sensitive film. A theoretical model is presented to describe wave propagation in Love wave devices with large piezoelectricity and to allow the design of an optimized structure. In wireless device testing using a network analyzer, infusion of CO_2 into the testing chamber induced large phase shifts of the reflection peaks owing to the interaction between the sensing film and the test gas (CO_2). Good linearity and repeatability were observed at CO_2 concentrations of 0-350ppm. The obtained sensitivity from the Love wave device was approximately 7.07° ppm~(-1). The gas response properties of the fabricated Love-wave sensor in terms of linearity and sensitivity were provided, and a comparison to surface acoustic wave devices was also discussed.
机译:开发了一种基于440 MHz无线和无源Love波的化学传感器,用于CO_2检测。所开发的设备由在41°YX LiNbO_3压电基板上构图的反射延迟线,聚甲基丙烯酸甲酯(PMMA)波导层和Teflon AF 2400敏感膜组成。提出了一个理论模型来描述具有较大压电性的Love波器件中的波传播,并允许设计优化的结构。在使用网络分析仪的无线设备测试中,由于传感膜和测试气体(CO_2)之间的相互作用,将CO_2注入测试室会引起反射峰的大相移。在0-350ppm的CO_2浓度下观察到良好的线性和可重复性。从洛夫波装置获得的灵敏度约为7.07°ppm〜(-1)。提供了线性和灵敏度方面的人造Love-wave传感器的气体响应特性,并讨论了与声表面波器件的比较。

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