Journal
SOFT MATTER
Volume 14, Issue 24, Pages 5069-5079Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8sm00611c
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Funding
- LAAS-CNRS micro and nano-technologies platform
- Ligue contre le cancer
- project Gene Extractor from Region Midi-Pyrenees
- ANR grant LAS [ANR-16-CE18-0028-01]
- Agence Nationale de la Recherche (ANR) [ANR-16-CE18-0028] Funding Source: Agence Nationale de la Recherche (ANR)
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DNA separation and analysis have advanced over recent years, benefiting from microfluidic systems that reduce sample volumes and analysis costs, essential for sequencing and disease identification in body fluids. We recently developed the mu LAS technology that enables the separation, concentration, and analysis of nucleic acids with high sensitivity. The technology combines a hydrodynamic flow actuation and an opposite electrophoretic force in viscoelastic polymer solutions. Combining hydrodynamics first principles and statistical mechanics, we provide, in this paper, a quantitative model of DNA transport capable of predicting device performance with the exclusive use of one adjustable parameter associated with the amplitude of transverse viscoelastic forces. The model proves to be in remarkable agreement with DNA separation experiments, and allows us to define optimal conditions that result in a maximal resolution length of 7 bp. We finally discuss the usefulness of our model for separation technologies involving viscoelastic liquids.
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