Nanochannel with uniform and janus surfaces: Shear thinning and thickening in surfactant solution

Noriyoshi Arai, Kenji Yasuoka, X. C. Zeng

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


On basis of molecular simulation of confined surfactant solutions, we show that by adding chemical patterns on the inner surface of nanochannels dynamical properties of the confined surfactant solutions could be modified from shear thinning to shear thickening. To this end, we select uniformly hydrophobic and hydrophilic surfaces as well as a stripe-patterned Janus surface as three prototype confining surfaces of nanochannels. In all three nanochannels, when the surfactant solution is under relatively low shear rates, it shears thin. Under moderate shear rates, a sharp decrease in the shear viscosity could occur due to surfactant morphology transition. Under relatively high shear rates, a shear-thinning-to-thickening transition can emerge due to the tendency of stratification normal to the confining surface. Our simulation study offers a guide to steering dynamic properties of surfactant fluids in nanofluidic devices through engineering surfaces of nanochannels by design.

Original languageEnglish (US)
Pages (from-to)2866-2872
Number of pages7
Issue number5
StatePublished - Feb 7 2012

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Fingerprint Dive into the research topics of 'Nanochannel with uniform and janus surfaces: Shear thinning and thickening in surfactant solution'. Together they form a unique fingerprint.

Cite this