Couplants in Acoustic Biosensing Systems
Rayyan Manwar, Loïc Saint‐Martin, Kamran Avanaki
Abstract
Acoustic biosensors are widely used in physical, chemical, and biosensing applications. One of the major concerns in acoustic biosensing is the delicacy of the medium through which acoustic waves propagate and reach acoustic sensors. Even a small airgap diminishes acoustic signal strengths due to high acoustic impedance mismatch. Therefore, the presence of a coupling medium to create a pathway for an efficient propagation of acoustic waves is essential. Here, we have reviewed the chemical, physical, and acoustic characteristics of various coupling material (liquid, gel-based, semi-dry, and dry) and present a guide to determine a suitable application-specific coupling medium.
Topics & Concepts
BiosensorAcousticsAcoustic impedanceDelicacyAcoustic waveCoupling (piping)SIGNAL (programming language)Materials scienceTransducerComputer scienceNanotechnologyPhysicsUltrasonic sensorGeologyMetallurgyProgramming languagePaleontologyPhotoacoustic and Ultrasonic ImagingAdvanced Sensor and Energy Harvesting MaterialsPolydiacetylene-based materials and applications