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Dual SAW sensor technique for determining mass and modulus changes

机译：双SAW传感器技术可确定质量和模量变化

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摘要

Surface acoustic wave (SAW) sensors, which are sensitive to anvariety of surface changes, have been widely used for chemical andnphysical sensing. The ability to control or compensate for the manynsurface forces has been instrumental in collecting valid data. In casesnin which it is not possible to neglect certain effects, such asnfrequency drift with temperature, methods such as the “dualnsensor” technique have been utilized. This paper describes a novelnuse of a dual sensor technique, using two sensor materials (quartz andnGaAs) to separate out the contributions of mass and modulus of thenfrequency change during gas adsorption experiments. The large modulusnchange in the film calculated using this technique and predicted by thenGassmann equation provide a greater understanding of the challenges ofnSAW sensing
机译：对各种表面变化敏感的表面声波（SAW）传感器已广泛用于化学和物理传感。控制或补偿表面力的能力有助于收集有效数据。在无法忽略某些影响的情况下，例如随温度的频率漂移，已经使用了诸如“双传感器”技术之类的方法。本文介绍了一种双传感器技术的新颖用法，该技术使用两种传感器材料（石英和nGaAs）来分离气体吸附实验期间质量和模量以及随后频率变化的贡献。使用该技术计算并由当时的Gassmann方程预测的薄膜中较大的模量变化，可以更好地理解nSAW传感的挑战

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