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Özbey A, Karimzadehkhouei M, Akgönül S, et al. Inertial Focusing of Microparticles in Curvilinear Microchannels. Sci Rep. 2016;6:38809doi: 10.1038/srep38809.
Özbey, A., Karimzadehkhouei, M., Akgönül, S., Gozuacik, D., & Koşar, A. (2016). Inertial Focusing of Microparticles in Curvilinear Microchannels. Scientific reports, 638809. https://doi.org/10.1038/srep38809
Özbey, Arzu, et al. "Inertial Focusing of Microparticles in Curvilinear Microchannels." Scientific reports vol. 6 (2016): 38809. doi: https://doi.org/10.1038/srep38809
Özbey A, Karimzadehkhouei M, Akgönül S, Gozuacik D, Koşar A. Inertial Focusing of Microparticles in Curvilinear Microchannels. Sci Rep. 2016 Dec 19;6:38809. doi: 10.1038/srep38809. PMID: 27991494; PMCID: PMC5171716.
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Sci Rep. 2016 Dec 19;6:38809. doi: 10.1038/srep38809.

Inertial Focusing of Microparticles in Curvilinear Microchannels.

Scientific reports

Arzu Özbey, Mehrdad Karimzadehkhouei, Sarp Akgönül, Devrim Gozuacik, Ali Koşar

Affiliations

  1. Faculty of Engineering and Natural Science, Molecular Genetics and Bioengineering Program, Sabanci University, Orhanli-Tuzla, Istanbul, 34956, Turkey.
  2. Faculty of Engineering and Natural Science, Biological Sciences and Bioengineering Program, Sabanci University, Orhanli-Tuzla, Istanbul, 34956, Turkey.
  3. Center of Excellence for Functional Surfaces and Interfaces for Nano-Diagnostics (EFSUN), Sabanci University, Orhanli-Tuzla, Istanbul, 34956, Turkey.

PMID: 27991494 PMCID: PMC5171716 DOI: 10.1038/srep38809

Abstract

A passive, continuous and size-dependent focusing technique enabled by "inertial microfluidics", which takes advantage of hydrodynamic forces, is implemented in this study to focus microparticles. The objective is to analyse the decoupling effects of inertial forces and Dean drag forces on microparticles of different sizes in curvilinear microchannels with inner radius of 800 μm and curvature angle of 280°, which have not been considered in the literature related to inertial microfluidics. This fundamental approach gives insight into the underlying physics of particle dynamics and offers continuous, high-throughput, label-free and parallelizable size-based particle separation. Our design allows the same footprint to be occupied as straight channels, which makes parallelization possible with optical detection integration. This feature is also useful for ultrahigh-throughput applications such as flow cytometers with the advantages of reduced cost and size. The focusing behaviour of 20, 15 and 10 μm fluorescent polystyrene microparticles was examined for different channel Reynolds numbers. Lateral and vertical particle migrations and the equilibrium positions of these particles were investigated in detail, which may lead to the design of novel microfluidic devices with high efficiency and high throughput for particle separation, rapid detection and diagnosis of circulating tumour cells with reduced cost.

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