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个人信息Personal Information
教授 博士生导师
招生学科专业：
力学 -- 【招收博士、硕士研究生】 -- 航空学院
机械工程 -- 【招收博士、硕士研究生】 -- 航空学院
机械 -- 【招收博士、硕士研究生】 -- 航空学院
主要任职：Chang-Jiang Distinguished Professor
其他任职：IAAM Fellow; board member of Chinese Acoustical Society and member of its academic work committee, and deputy director of expert committees on electronic information materials and devices, and on Aerospace materials, Chinese national think tank for materials and devices.
性别：男
毕业院校：Tokyo Institute of Technology
学历：东京工业大学
学位：哲学博士学位
所在单位：Nanjing University of Aeronautics & Astronautics
办公地点：A18-1106
联系方式：ejhhu@nuaa.edu.cn; HP:18912946712 TEl:025-84891681
电子邮箱：
Physical principle of enhancing the sensitivity of a metal oxide gas sensor using bulk acoustic waves
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所属单位：航空学院
发表刊物：J Appl Phys
摘要：The bulk acoustic wave (BAW) assisted gas sensor utilizes the BAW to raise the sensitivity of a gas sensor, which provides a new and universal physical strategy to greatly improve the sensitivity of gas sensors. However, the physical principle of this type of gas sensor has not been clarified yet. In this work, the physical principle of the BAW assisted gas sensor is investigated experimentally and theoretically, and the effects of sound pressure and acoustic streaming on the sensing process are directly verified. It indicates that the transfer of target gas molecules onto the sensing surface can be enhanced by sound pressure on the sensing surface, which results in a significant increase of both the sensing response and sensitivity. Also, it is found that the sensing surface can be cooled down by acoustic streaming, which causes a sensing response change opposite to the change direction caused by the sound pressure, and little change of the sensitivity. It is predicted and experimentally verified that when both acoustic streaming and sound pressure exist on the sensing surface, the sensing characteristics should be between those of the two extreme working modes in which there is only sound pressure or acoustic streaming on the sensing surface. © 2018 Author(s).
ISSN号：0021-8979
是否译文：否
发表时间：2018-12-28
合写作者：Su, Songfei,Liu, Pengzhan,Tang, Qiang
通讯作者：Su, Songfei,胡俊辉