The acoustophoresis microfiuidic chip,whose vibration is provided by piezoelectric ceramics,is one of the most important method used to realize micro-beads operation and study the cell separation.In order to efficiently design,analyze,and optimize the acoustophoresis microfluidic chip,the transfer matrix method is studied to describe the piezoelectricity and the acoustic field within the microfluidic chip.A one-dimensional transfer matrix model is derived for the acoustophoresis microfluidic chip with layered structures.This 1-D transfer matrix model is subsequently used to analyze a certain given example chip to achieve the parameter analysis and structural optimization.The results show that this 2-D transfer matrix model is efficient not only for the chip optimization during the design process,but also for the option parameter selection during the chip application.%以压电陶瓷为振动源的压电微流芯片是实现微粒子操作、细胞分离等微流控研究的重要手段之一.能够描述压电效应以及超声声场在微流芯片各介质中分布规律的传递矩阵方法是进行微流压电芯片分析、设计与优化的一种有效手段.采用传递矩阵法推导了层叠式压电微流芯片的一维传递函数模型;对给定的算例芯片进行了参数分析与结构优化设计.结果表明一维传递函数模型既可在压电微流芯片设计中对结构参数进行优化,又可在实验过程中对实验参数的选定提供指导.
展开▼
