Glynne-Jones P, Boltryk R J, Hill M, Harris N R, Baclet P
School of Engineering Sciences, University of Southampton, Southampton, United Kingdom.
J Acoust Soc Am. 2009 Sep;126(3):EL75-9. doi: 10.1121/1.3186800.
Existing ultrasonic manipulation devices capable of pushing particles to a surface ("quarter-wave" devices) have significant potential in sensor applications. A configuration for achieving this that uses the first thickness resonance of a layered structure with both a thin reflector layer and thin-fluid layer is described here. Crucially, this mode is efficient with lossy reflector materials such as polymers, produces a more uniform acoustic radiation force at the reflector, and is less sensitive to geometric variations than previously described quarter-wave devices. This design is thus expected to be suitable for mass produced, disposable devices.
现有的能够将颗粒推至表面的超声操纵装置（“四分之一波长”装置）在传感器应用中具有巨大潜力。本文描述了一种实现此目的的配置，该配置利用具有薄反射层和薄流体层的分层结构的一阶厚度共振。至关重要的是，这种模式对于诸如聚合物等有损耗的反射器材料效率很高，在反射器处产生更均匀的声辐射力，并且比先前描述的四分之一波长装置对几何变化更不敏感。因此，这种设计有望适用于大规模生产的一次性装置。
