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Versatile Tool for Droplet Generation in Standard Reaction Tubes by Centrifugal Step Emulsification. | LitMetric

AI Article Synopsis

  • A new tool for creating consistent water-in-fluorinated-oil droplets is introduced, enabling easy droplet generation in standard lab centrifuges using a simple two-part microfluidic cartridge.
  • This method can produce over 6 billion monodisperse droplets in under 10 minutes, ideal for a range of downstream analyses.
  • Two applications, digital droplet PCR and digital droplet LAMP, demonstrate that the droplets maintain excellent assay performance, confirming the method's reliability and efficiency.

Article Abstract

We present a versatile tool for the generation of monodisperse water-in-fluorinated-oil droplets in standard reaction tubes by centrifugal step emulsification. The microfluidic cartridge is designed as an insert into a standard 2 mL reaction tube and can be processed in standard laboratory centrifuges. It allows for droplet generation and subsequent transfer for any downstream analysis or further use, does not need any specialized device, and manufacturing is simple because it consists of two parts only: A structured substrate and a sealing foil. The design of the structured substrate is compatible to injection molding to allow manufacturing at large scale. Droplets are generated in fluorinated oil and collected in the reaction tube for subsequent analysis. For sample sizes up to 100 µL with a viscosity range of 1 mPa·s-4 mPa·s, we demonstrate stable droplet generation and transfer of more than 6 × 10 monodisperse droplets (droplet diameter 66 µm ± 3 µm, CV ≤ 4%) in less than 10 min. With two application examples, a digital droplet polymerase chain reaction (ddPCR) and digital droplet loop mediated isothermal amplification (ddLAMP), we demonstrate the compatibility of the droplet production for two main amplification techniques. Both applications show a high degree of linearity (ddPCR: R ≥ 0.994; ddLAMP: R ≥ 0.998), which demonstrates that the cartridge and the droplet generation method do not compromise assay performance.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7221521PMC
http://dx.doi.org/10.3390/molecules25081914DOI Listing

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