The invention discloses an inertial focusing chip based on an enhanced two flow, which belongs to the field of micro fluidic technology. The two layer chip chip bonding, which is one of the micro channel chip bonding layer on the surface of the micro channel are respectively connected with both ends of the entrance and exit; which is characterized in that the micro channel along the curvature channel, the first channel curvature two stream (Di Enliu); a plurality of convex structure the distribution of the wall surface of the channel, the channel is the channel of variable section, generates a 22 flow (two times flow caused by the geometric structure). The microfluidic chip can be used for sorting, separating, counting and detecting particles or cells, and is also applicable to fluid mixing, sample pretreatment and the like. The present invention also by using two kinds of inertial focusing chip two of the secondary flow, the fluid will produce two kinds of two secondary flow in the flow, at the same time to ensure that the two kinds of two flow in the same direction, which are superimposed on each other, improve the two strength of flow, enhance the guiding role of the two stream.
【技术实现步骤摘要】
基于增强型二次流的惯性聚焦芯片
本专利技术属于微流控
,具体涉及的是一种惯性聚焦微流控芯片。
技术介绍
文献“Threedimensional,sheathless,andhigh‐throughputmicroparticleinertialfocusingthroughgeometry‐inducedsecondaryflows[J].Small,2013,9(5):685-690.”公开了一种基于几何结构引起二次流的惯性聚焦芯片。该芯片采用了一种带有单侧台阶的微通道结构,通道截面在台阶边缘发生突变,通道内的流体会在突变处发生弯曲,形成弯曲流,从而产生了几何结构引起的二次流。同时,由于惯性效应,微通道中的微粒受到流体流动的影响,在经过一定长度的运动之后,会逐渐迁移到某几个固定位置处。通过几何结构引起二次流的引导作用和流体的惯性效应,微粒会逐渐运动到单一的稳定位置,实现良好的聚焦效果和聚焦效率。文献中公开的基于单一二次流的惯性聚焦方法,其二次流强度通常较弱,引导作用不明显。基于该方法所设计的微通道结构,其截面尺寸较小(84μm×41.5μm),通道长度较长 ...
【技术保护点】
一种基于增强型二次流的惯性聚焦芯片,由两个芯片层键合而成,其中之一的芯片层键合面上有微通道,微通道两端分别连接入口和出口;其特征在于,所述微通道为一带曲率通道,所述曲率通道产生第一二次流;通道壁面上分布有若干个凸台结构,使得所述通道为变截面通道,产生第二二次流;所述凸台结构位于通道壁曲面为凸的一侧,使得第一二次流与第二二次流同向。
【技术特征摘要】
1.一种基于增强型二次流的惯性聚焦芯片,由两个芯片层键合而成,其中之一的芯片层键合面上有微通道,微通道两端分别连接入口和出口;其特征在于,所述微通道为一带曲率通道,所述曲率通道产生第一二次流;通道壁面上分布有若干个凸台结构,使得所述通道为变截面通道...
【专利技术属性】
技术研发人员:常洪龙,冯建国,寻文鹏,
申请(专利权)人:西北工业大学,
类型:发明
国别省市:陕西,61
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