Inertial microfluidics in parallel channels for high-throughput applications

QC 20121115. Updated from accepted to published.
Passive particle focusing based on inertial microfluidics was recently introduced as a high-throughput alternative to active focusing methods that require an external force-field to manipulate particles. In this study, we introduce inertial microfluidics in flows through straight, multiple parallel channels. The scalable, single inlet and two outlet, parallel channel system is enabled by a novel, high-density 3D PDMS microchannel manufacturing technology, mediated via a targeted inhibition of PDMS polymerization. Using single channels, we first demonstrate how randomly distributed particles can be focused into the centre position of the channel in flows through low aspect ratio channels and can be effectively fractionated. As a proof of principle, continuous focusing and filtration of 10 μm particles from a suspension mixture using 4- and 16-parallel-channel devices with a single inlet and two outlets are demonstrated. A filtration efficiency of 95-97% was achieved at throughputs several orders of magnitude higher than previously shown for flows through straight channels. The scalable and low-footprint focusing device requiring neither external force fields nor mechanical parts to operate is readily applicable for high-throughput focusing and filtration applications as a stand-alone device or integrated with lab-on-a-chip systems.

NATURVETENSKAP Biologi Biokemi och molekylärbiologi hsv//swe
NATURAL SCIENCES Biological Sciences Biochemistry and Molecular Biology hsv//eng
article
filtration
force
fractionation
inertial microfluidics
lab on a chip
microfluidics
priority journal

Karlsson, Mikael J.KTH,Mikrosystemteknik(Swepub:kth)u1p5d66f (author)
Haraldsson, TommyKTH,Mikrosystemteknik(Swepub:kth)u1ohdrr6 (author)
Brismar, HjalmarKarolinska Institutet,KTH,Cellens fysik,Science for Life Laboratory, SciLifeLab(Swepub:kth)u1232ew5 (author)
van der Wijngaart, WouterKTH,Mikrosystemteknik(Swepub:kth)u1wdbont (author)
Russom, AmanKTH,Cellens fysik,Nanobioteknologi(Swepub:kth)u1go6jxm (author)
KTHCellens fysik (creator_code:org_t)

In:Lab on a Chip: Royal Society of Chemistry12:22, s. 4644-46501473-01971473-0189

By the author/editor: Hansson, Jonas; Karlsson, Mikael ...; Haraldsson, Tomm ...; Brismar, Hjalmar; van der Wijngaar ...; Russom, Aman

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Biochemistry and ...

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