Thermal molecular focusing: tunable cross effect of phoresis and light-driven hydrodynamic focusing

Tatsuya Fukuyama, Sho Nakama, Yusuke T. Maeda

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The control of solute flux 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 solutes 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 the viscoelastic expansion of a solution and the viscosity gradient of a smaller solute are coupled, which explains the underlying hydrodynamic focusing. This effect offers novel non-invasive manipulation of soft and biological materials in a frequency-tunable manner.

Original languageEnglish
Pages (from-to)5519-5524
Number of pages6
JournalSoft Matter
Volume14
Issue number26
DOIs
Publication statusPublished - Jan 1 2018

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics

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