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Directional Transport of Polymer Sheet and a Microsphere by a Rationally Aligned Nanowire Array

Authors

  • Weiwei Wu,

    1. Institute of Nanoscience and Nanotechnology, Lanzhou University, Lanzhou 730000, P.R. China
    Current affiliation:
    1. W.W. and L.C. contributed equally to this work.
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  • Li Cheng,

    1. Institute of Nanoscience and Nanotechnology, Lanzhou University, Lanzhou 730000, P.R. China
    Current affiliation:
    1. W.W. and L.C. contributed equally to this work.
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  • Suo Bai,

    1. Institute of Nanoscience and Nanotechnology, Lanzhou University, Lanzhou 730000, P.R. China
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  • Zhong Lin Wang,

    Corresponding author
    1. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA
    • School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA.
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  • Yong Qin

    Corresponding author
    1. Institute of Nanoscience and Nanotechnology, Lanzhou University, Lanzhou 730000, P.R. China
    • Institute of Nanoscience and Nanotechnology, Lanzhou University, Lanzhou 730000, P.R. China
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Abstract

original image

Aligned oblique nanowire arrays (AONWAs; top image) with controllable obliquity, NW diameter, length, and density are produced by a novel method. A mechanism of array formation is proposed and it is demonstrated that the surface structure of AONWAs can be utilized to transport objects ranging from a polystyrene microsphere to a macroscopic PET sheet (lower figures). Unidirectional wetting of the surface and the relation between the anisotropy of the wetting and the NWs' obliquity are described. Potential applications of the AONWAs include fluidic diodes, drug delivery systems, and self-cleaning without a liquid.

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