Theoretical optimizations of acoustic wave gas sensors with high conductivity sensitivities
Theoretical optimizations of acoustic wave gas sensors with high conductivity sensitivities
复制标题
高电导灵敏度声波气体传感器的理论优化
DOI：
10.1016/j.snb.2012.05.046
复制
发表时间：
2012-08-01
影响因子：
8.4
通讯作者：
Zhang, Hui
中科院分区：
文献类型：
--
作者：
Fan, Li;Zhang, Shu-yi;Zhang, Hui
用传递矩阵法计算了声波气敏元件中吸附物质引起的表面电导率变化引起的频率偏移和电损耗。研究发现，高电导率灵敏度总是伴随着高电损耗，这增加了插入损耗和传感器的最小可检测质量。然而，在相同的电扰动下，具有较长工作波长的AW传感器具有较小的电损耗，这提供了在气体传感器中实现高电导灵敏度的同时降低最小可检测质量的机会。(c)2012 Elsevier B.V.保留所有权利。
The frequency shift and electric loss induced by the variation of the surface conductivity caused by the sorbed matter in the acoustic wave (AW) gas sensor are evaluated with the transfer matrix method. It is found that the high conductivity sensitivity is always accompanied by the high electric loss, which increases the insert losses and the minimum detectable masses of the sensors. However, with the same electric perturbation, the AW sensors with longer operating wavelengths have smaller electric losses, which provides the opportunities to achieve the high conductivity sensitivity and reduce the minimum detectable mass simultaneously in the gas sensor. (c) 2012 Elsevier B.V. All rights reserved.