AI Article Synopsis
- The study explores how pseudo lateral-field-excitation (LFE) methods can enhance the sensitivity of devices that measure changes in liquid properties using LGT crystals.
- It identifies the optimal cut orientation of the LGT crystals for effectively utilizing pseudo-LFE, and conducts experiments confirming this approach.
- The findings indicate that LGT-based LFE devices are significantly more sensitive to changes in conductivity and viscosity of liquids compared to traditional AT-cut quartz devices, offering a promising avenue for high-performance liquid phase sensors.
Article Abstract
In the present study, pseudo lateral-field-excitation (LFE) bulk acoustic wave characteristics on LGT crystals are investigated to increase the sensitivity of LFE devices on the liquid characteristic variations. The cut orientation of LGT crystals for pseudo-LFE is investigated and verified experimentally. For an LFE device in the pseudo-LFE mode, the thickness shear mode wave is excited by the thickness field rather than the lateral field. The present work shows that when the (yxl) 13.8° LGT plate is excited by the electric field parallel to the crystallographic axis , it operates in the pseudo-LFE mode. Moreover, characteristics of devices including the sensitivity and impedance are investigated. The present work shows that sensitivity of LFE devices to variation of the conductivity and permittivity of the aqueous solution are 9 and 3.2 times higher than those for AT-cut quartz crystal based devices, respectively. Furthermore, it has been found that the sensitivity of the LGT LFE sensor to liquid acoustic viscosity variations is 1.4 times higher than the one for the AT-cut quartz sensor. The results are a critical basis of designing high-performance liquid phase sensors by using pseudo-LFE devices.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6427506 | PMC |
| http://dx.doi.org/10.3390/s19051076 | DOI Listing |
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