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A Simple, Robust, and High Throughput Single Molecule Flow Stretching Assay Implementation for Studying Transport of Molecules Along DNA
Published on: October 1, 2017
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Mesoscopic simulation of single DNA dynamics in rotational flows
1Micro/nanofluidics Research Laboratory, Department of Mechanical Engineering, College of Engineering Trivandrum, Govermnet of Kerala, 695016, Thiruvananthapuram, India, ranjith@cet.ac.in.
The European Physical Journal. E, Soft Matter
|August 29, 2015
Summary
This study reveals DNA molecules in microchannels are trapped in rotating fluid vortices. Modifying microchannel hydrophobicity can control DNA molecule residence time within these hydrodynamic traps.
Area of Science:
- Biophysics
- Fluid Dynamics
- Nanotechnology
Background:
- Microfluidic devices enable precise control over fluid dynamics at the microscale.
- Understanding macromolecule behavior in complex flow fields is crucial for applications like DNA sequencing and drug delivery.
Purpose of the Study:
- To investigate the transport and dynamics of an isolated DNA molecule in rotational microchannel flow.
- To analyze the influence of microvortices on DNA conformation, mobility, and residence time.
Main Methods:
- Numerical simulations using dissipative particle dynamics (DPD).
- Analysis of DNA polymer chain migration, orientation, size, and tumbling period within a square microchannel cavity.
Main Results:
- DNA molecules migrate towards and follow vortex streamlines in rotational flow.
- Microvortex strength significantly affects DNA orientation, size, and tumbling period.
- A hydrodynamic trap is formed at elevated flow rates, retaining the DNA molecule.
- DNA residence time is influenced by chain length, flow strength, and microchannel hydrophobicity.
Conclusions:
- Rotational microflow can create hydrodynamic traps for DNA molecules.
- Microchannel hydrophobicity offers a strategy to control DNA molecule entrapment duration.
- These findings have implications for designing advanced microfluidic systems for biopolymer manipulation.
