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Well-aligned Vertically Oriented ZnO Nanorod Arrays and their Application in Inverted Small Molecule Solar Cells
Published on: April 25, 2018
The Effect of Weak Confinement on the Orientation of Nanorods under Shear Flows
Saman Monjezi1, James D Jones2, Alyssa K Nelson3
1The Department of Chemical & Biochemical Engineering, Missouri University of Science & Technology, Rolla, MO 65409, USA. saman.monjezi@mst.edu.
Abstract:
We performed a numerical analysis to study the orientation distribution of a dilute suspension of thin, rigid, rod-like nanoparticles under shearing flow near a solid boundary of weak confinement. Brownian dynamics simulation of a rod was performed under various ratios of shear rate and rod diffusivity (Peclet number), as well as the center-of-mass position (wall confinement). We discuss the effects of Peclet number and wall confinement on the angle distributions, Jeffery orbit distribution and average orientation moments. The average orientation moments, obtained as a function of Peclet number and wall confinement, can be used to improve a previous shear-induced migration model. We demonstrate that the improved model can give excellent prediction of the orientation moment distributions in a microchannel flow.
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