Issue 71, 2019

Sheath-less high throughput inertial separation of small microparticles in spiral microchannels with trapezoidal cross-section

Abstract

Various mechanisms of different designs have emerged for the purpose of microparticle separation and cell sorting. The main goals behind such designs are to create high throughput and high purity sample isolation. In this study, high efficiency, high throughput and precise separation of microparticles under inertial lift and drag forces induced by trapezoidal curvilinear channels are reported. This work is the first to focus and recover 2 from 5 μm and 2 from 10 μm particles in spiral channels in a sheath-less flow device, which reduces the overall complexity of the system and allows for higher throughput. The new microfluidic chip design is fabricated in glass using femtosecond laser ablation. In addition, mathematical force calculations were conducted during the design phase of the microfluidic channels and compared with experiments. The results show a close prediction of the equilibrium position of the tested microparticles.

Graphical abstract: Sheath-less high throughput inertial separation of small microparticles in spiral microchannels with trapezoidal cross-section

Supplementary files

Article information

Article type
Paper
Submitted
30 Jul 2019
Accepted
28 Nov 2019
First published
18 Dec 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 41970-41976

Sheath-less high throughput inertial separation of small microparticles in spiral microchannels with trapezoidal cross-section

A. Al-Halhouli, A. Albagdady and A. Dietzel, RSC Adv., 2019, 9, 41970 DOI: 10.1039/C9RA05916D

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