alexa A phaseguided passive batch microfluidic mixing chamber for isothermal amplification.
General Science

General Science

Research & Reviews: Journal of Botanical Sciences

Author(s): Hakenberg S, Hgle M, Weidmann M, Hufert F, Dame G, , Hakenberg S, Hgle M, Weidmann M, Hufert F, Dame G, , Hakenberg S, Hgle M, Weidmann M, Hufert F, Dame G, , Hakenberg S, Hgle M, Weidmann M, Hufert F, Dame G,

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Abstract With a view to developing a rapid pathogen detection system utilizing isothermal nucleic acid amplification, the necessary micro-mixing step is innovatively implemented on a chip. Passive laminar flow mixing of two 6.5 μl batches differing in viscosity is performed within a microfluidic chamber. This is achieved with a novel chip space-saving phaseguide design which allows, for the first time, the complete integration of a passive mixing structure into a target chamber. Sequential filling of batches prior to mixing is demonstrated. Simulation predicts a reduction of diffusive mixing time from hours down to one minute. A simple and low-cost fabrication method is used which combines dry film resist technology and direct wafer bonding. Finally, an isothermal nucleic acid detection assay is successfully implemented where fluorescence results are measured directly from the chip after a one minute mixing sequence. In combination with our previous work, this opens up the way towards a fully integrated pathogen detection system in a lab-on-a-chip format. This article was published in Lab Chip and referenced in Research & Reviews: Journal of Botanical Sciences

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