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Thermal Molecular Focusing: Tunable Cross effect of Phoresis and Light-driven Hydrodynamic Focusing

Abstract

The control of solute fluxes by either microscopic phoresis or hydrodynamic advection is a fundamental way to transport molecules, which are ubiquitously present in nature and technology. We study the transport of large solute such as DNA driven by a time-dependent thermal field in a polymer solution. Heat propagation of a heat spot moving back and forth gives rise to the molecular focusing of DNA with frequency-tunable control. We develop a model where viscoelastic expansion of a solution and viscosity gradient of a smaller solute are coupled, and that explains the underlying hydrodynamic focusing. This effect offers novel non-invasive manipulation of soft and biological materials in a frequency tunable manner.

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Publication details

The article was received on 11 Apr 2018, accepted on 06 Jun 2018 and first published on 08 Jun 2018


Article type: Paper
DOI: 10.1039/C8SM00754C
Citation: Soft Matter, 2018, Accepted Manuscript
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    Thermal Molecular Focusing: Tunable Cross effect of Phoresis and Light-driven Hydrodynamic Focusing

    T. Fukuyama, S. Nakama and Y. Maeda, Soft Matter, 2018, Accepted Manuscript , DOI: 10.1039/C8SM00754C

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