Title :
Electrical Sensoring Characteristics of Pseudo-LFE Sensors with Different Single Crystals
Author :
Zhitian Zhang ; Chao Zhang ; Wenyan Wang ; Yan Liu ; Tingfeng Ma
Author_Institution :
Shenzhen Optomechatronics Key Lab., Tsinghua Univ. in Shenzhen, Shenzhen, China
Abstract :
In the present study, three pseudo-LFE devices made of (yxl)21.82° LiNbO3, Y-cut LiTaO3 and Y-cut langasite were investigated and compared. The coupling factors and phase velocities of all devices were calculated for device design. The sensitivity of these three devices to the electrical property changes of liquid were tested in isopropanol-water and NaCl-water solution. The results shown that (yxl)21.82° LiNbO3 device is more sensitive to the change of liquid conductivity and Y-cut LiTaO3 device is more sensitive to the change of liquid permittivity. For the design of polymer coated gas sensors, the choose of pseudo-LFE device determines by the characteristics of conductive-polymer.
Keywords :
conducting polymers; electric sensing devices; electrical conductivity; gallium compounds; gas sensors; lanthanum compounds; lithium compounds; permittivity; piezoelectric materials; surface acoustic wave sensors; La3Ga5SiO14; Lateral field excitation (LFE) sensor; LiNbO3; LiTaO3; NaCl-water solution; V-cut langasite; conductive polymer; coupling factors; electrical sensoring characteristics; isopropanol-water solution; liquid conductivity; liquid permittivity; phase velocities; polymer coated gas sensors; pseudoLFE sensors; single crystals; Couplings; Liquids; Lithium niobate; Polymers; Resonant frequency; Sensors; Langasite; LiNbO3; LiTaO3; electrical sensoring; pseudo-LFE;
Conference_Titel :
Green Computing and Communications (GreenCom), 2013 IEEE and Internet of Things (iThings/CPSCom), IEEE International Conference on and IEEE Cyber, Physical and Social Computing
Conference_Location :
Beijing
DOI :
10.1109/GreenCom-iThings-CPSCom.2013.306
