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    On-Chip Generation of Vortical Flows for Microfluidic Centrifugation.

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    Author
    Ahmed, H; Ramesan, S; Lee, L; Rezk, AR; Yeo, LY
    Date
    2020-03-05
    Source Title
    Small
    Publisher
    Wiley
    University of Melbourne Author/s
    Ramesan, Shwathy
    Affiliation
    Chemical and Biomolecular Engineering
    Metadata
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    Document Type
    Journal Article
    Citations
    Ahmed, H., Ramesan, S., Lee, L., Rezk, A. R. & Yeo, L. Y. (2020). On-Chip Generation of Vortical Flows for Microfluidic Centrifugation.. Small, 16 (9), pp.e1903605-e1903605. https://doi.org/10.1002/smll.201903605.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/253832
    DOI
    10.1002/smll.201903605
    Open Access URL
    https://rss.onlinelibrary.wiley.com/doi/am-pdf/10.1002/smll.201903605
    Abstract
    Microcentrifugation constitutes an important part of the microfluidic toolkit in a similar way that centrifugation is crucial to many macroscopic procedures, given that micromixing, sample preconcentration, particle separation, component fractionation, and cell agglomeration are essential operations in small scale processes. Yet, the dominance of capillary and viscous effects, which typically tend to retard flow, over inertial and gravitational forces, which are often useful for actuating flows and hence centrifugation, at microscopic scales makes it difficult to generate rotational flows at these dimensions, let alone with sufficient vorticity to support efficient mixing, separation, concentration, or aggregation. Herein, the various technologies-both passive and active-that have been developed to date for vortex generation in microfluidic devices are reviewed. Various advantages or limitations associated with each are outlined, in addition to highlighting the challenges that need to be overcome for their incorporation into integrated microfluidic devices.

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