Surface Acoustic Wave Sensing in Liquids: Features, Tendencies, Perspectives

Compressional acoustic waves in structure “Piezocylinder - viscoelastic layer - liquid”

“…The solution of the aforementioned equations must satisfy the boundary conditions on the interface "piezoelectricviscoelastic media" (r = a): We seek the solution of the equations (1)(2)(3)(4) in the form of the harmonic wave in accordance with the method taken from [3]:…”

“…At the present time it is known a large number of works devoted to the investigation of the influence of the liquid on the characteristics of the different types of acoustic waves (such as surface, leaky, plate and cylinder acoustic waves) [1,2,3]. This is due to possibility of creation on their basis of various devices working in contact with a liquid, such as sensors or transducers.…”

“…This is due to possibility of creation on their basis of various devices working in contact with a liquid, such as sensors or transducers. For some of these devices the radiation of energy of a propagating wave deep into liquid is an undesirable source of losses [1]. These are the various biological and chemical sensors working in contact with liquid and reacting to change of its physical and chemical properties.…”

Properties of the Anisimkin Jr.' Modes in Quartz Plates

“…Found in 2003, QL-modes have not been studied thoroughly, although they demonstrate a great promise in sensor applications with liquid environment because of low attenuation for viscous liquids [4], [5]. The goal of the present paper is to study the existence of the modes in quartz plates in more detail.…”