Application of an acoustoelectronic technique to study ordered microstructured disperse systems with biological objects in a hydrogel

Анисимкин, В. И.; Покусаев, Б. Г.; Складнев, Д. А.; Sorokin, V. V.; Tyupa, D. V.

doi:10.1134/s1063771016060014

Cited by 4 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This interaction results in a change in the phase velocities v (phases ϕ ) and amplitudes (attenuation α ) of the waves. Although the acoustoelectronic interaction takes place only in a thin liquid layer (~10 μm) adjacent to the interface and only in a narrow range of liquid conductivities ( σ ≈ 0.01 ÷ 10 S/m [ 7 ]), first-order plate modes have proven to be useful for applications such as the detection of yeasts and bacteria [ 27 , 28 ] and registration of the water-ice phase transition [ 20 , 29 ]. The propagation of shear-horizontal waves in the conductive liquid-loaded functionally graded porous piezoelectric media (FGPPM) has been investigated recently.…”

Section: Introductionmentioning

confidence: 99%

Multimode Design and Piezoelectric Substrate Anisotropy Use to Improve Performance of Acoustic Liquid Sensors

Smirnov

Анисимкин

Воронова³

et al. 2022

Sensors

View full text Add to dashboard Cite

Using acoustic wave modes propagation in piezoelectric plates loaded with conductive liquids, peculiarities of the mode-liquid acoustoelectric interaction are studied. It is found that (i) in contrast to bulk and surface acoustic waves propagating in piezoelectric semiconductors, the acoustoelectric attenuation of the modes is not symmetric in respect to its maximum, (ii) a large increase in attenuation may be accompanied by a small decrease in phase velocity and vice versa, (iii) the peculiarities are valid for “pure” (without beam steering) and “not pure” (with beam steering) modes, as well as for modes of different orders and polarizations, and (iv) conductivity of test liquid increases electromagnetic leakage between input and output transducers, affecting results of the measurements. To decrease the leakage, the liquid should be localized between transducers, outside the zone over them. If so, the mode sensitivity may be as large as 8.6 dB/(S/m) for amplitude and 107°/(S/m) for phase. However, because of comparable cross-sensitivity towards viscosity and dielectric permittivity, modes with selective detection of liquid conductivity are not found.

show abstract