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  • 1.
    Etcheverry, Sebastian
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics.
    Faridi, Muhammad Asim
    KTH. mafaridi@kth.se.
    Ramachandraiah, Harisha
    KTH, School of Biotechnology (BIO), Proteomics and Nanobiotechnology.
    Margulis, Walter
    Laurell, Fredrik
    KTH, School of Engineering Sciences (SCI), Applied Physics.
    Russom, Aman
    KTH, School of Biotechnology (BIO), Proteomics and Nanobiotechnology.
    Optical Fiber inertial focusing based micro FlowcytometerIn: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723Article in journal (Refereed)
    Abstract [en]

    Flow cytometry is a powerful method for analysis of cells and particles. Fueled by the need for point of care diagnostic applications, a significant effort has been made to miniaturize flow cytometry. However, despite recent advances, current microflow cytometers remain less versatile and much slower than their large-scale counterparts. Here, we present a portable all-silica optofluidic device that integrates particle focusing in flow through cylindrical silica capillaries and light delivery in optical fibers to simultaneously measure fluorescence and scattering from cells and particles at a rate of 2500 particles/s – a throughput comparable to conventional cytometers. Precise 3D cell focusing and ordering is accomplished using extended elasto-inertial focusing (EEF), a key enabler for eliminating the sheath fluid commonly employed in flow cytometry with maintained high throughput. We demonstrate simultaneously two-color fluorescence and scattering measurement of different sized particles and cells. This robust and low-cost optofluidic device, assembled without the need of clean-room facilities, is ideal suited for point of care applications.

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