The influence of Saffman lift force on nanoparticle concentration distribution near a wall | Zendy

Xu Zheng | Zendy; Zhanhua Silber-Li | Zendy

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The influence of Saffman lift force on nanoparticle concentration distribution near a wall

Author(s) -

Xu Zheng,

Zhanhua Silber-Li

Publication year - 2009

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3237159

Subject(s) - nanofluidics , lift (data mining) , microchannel , mechanics , materials science , nanoparticle , nanotechnology , physics , computer science , data mining

The lift force on a spherical nanoparticle near a wall in micro/nanofluidics has not received sufficient attention so far. In this letter the concentration of φ 200 nm particles is measured at 0.25-2.0 μm to a wall in a microchannel with pressure-driven de-ionized water flow (pressure gradient 0-2000 kPa/m). The measured data show the influence of the lift force on the nanoparticle concentration distribution. By introducing the Saffman lift force into the Nernst-Planck equation near a wall, we find that the lift force is dominant at the range of 2< z+ <6 (z+=z/2r, r is the particle radius, z is the distance from the wall). © 2009 American Institute of Physics.

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