Stooped Nanohairs: Geometry-Controllable, Unidirectional, Reversible, and Robust Gecko-like Dry Adhesive

Tae-il Kim; Hoon Eui Jeong; Kahp Y. Suh; Hong H. Lee

doi:10.1002/adma.200803710

Stooped Nanohairs: Geometry-Controllable, Unidirectional, Reversible, and Robust Gecko-like Dry Adhesive

Tae-il Kim, Hoon Eui Jeong, Kahp Y. Suh, Hong H. Lee

Research output: Contribution to journal › Article › peer-review

159 Scopus citations

Abstract

A study was conducted to demonstrate a simple method for fabricating stopped high-aspect-ratio (AR) nanohairs of polyurethane acrylate (PUA) material that utilized replica molding and post-electron-beam irradiation. The method offered a facile route to prepare angled polymer nanohairs without multistep processes or surface treatment. It was demonstrated that the PUA material was molded into a geometry controlled and high-density nanochair surface with an AR of up to 10 without facing self-matting problem, due to its favorable mechanical properties. The as-formed hairy structures also allowed for structural transformation into directional and angled nanohairs, while maintaining better adhesion capability. The nanohair surface also showed significant unidirectional adhesion properties and a higher shear adhesion due to its structural similarity to natural gecko foot hairs.

Original language	English (US)
Pages (from-to)	2276-2281
Number of pages	6
Journal	Advanced Materials
Volume	21
Issue number	22
DOIs	https://doi.org/10.1002/adma.200803710
State	Published - Jun 12 2009
Externally published	Yes

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title = "Stooped Nanohairs: Geometry-Controllable, Unidirectional, Reversible, and Robust Gecko-like Dry Adhesive",

abstract = "A study was conducted to demonstrate a simple method for fabricating stopped high-aspect-ratio (AR) nanohairs of polyurethane acrylate (PUA) material that utilized replica molding and post-electron-beam irradiation. The method offered a facile route to prepare angled polymer nanohairs without multistep processes or surface treatment. It was demonstrated that the PUA material was molded into a geometry controlled and high-density nanochair surface with an AR of up to 10 without facing self-matting problem, due to its favorable mechanical properties. The as-formed hairy structures also allowed for structural transformation into directional and angled nanohairs, while maintaining better adhesion capability. The nanohair surface also showed significant unidirectional adhesion properties and a higher shear adhesion due to its structural similarity to natural gecko foot hairs.",

author = "Tae-il Kim and Jeong, {Hoon Eui} and Suh, {Kahp Y.} and Lee, {Hong H.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUK-F1-037-02 Acknowledgements: This work was supported by the Korea Science & Engineering Foundation through the NANO R&D Program (Grant 2007-02605) and the King Abdullah University of Science and Technology (KAUST) program (KUK-F1-037-02). This work was also supported in part by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (Grant KRF-J03000), the Micro Thermal System Research Center, and the Engineering Research Institute. Supporting Information is available online at Wiley InterScience or from the author. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2009",

month = jun,

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doi = "10.1002/adma.200803710",

language = "English (US)",

volume = "21",

pages = "2276--2281",

journal = "Advanced Materials",

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T1 - Stooped Nanohairs: Geometry-Controllable, Unidirectional, Reversible, and Robust Gecko-like Dry Adhesive

AU - Kim, Tae-il

AU - Jeong, Hoon Eui

AU - Suh, Kahp Y.

AU - Lee, Hong H.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUK-F1-037-02 Acknowledgements: This work was supported by the Korea Science & Engineering Foundation through the NANO R&D Program (Grant 2007-02605) and the King Abdullah University of Science and Technology (KAUST) program (KUK-F1-037-02). This work was also supported in part by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (Grant KRF-J03000), the Micro Thermal System Research Center, and the Engineering Research Institute. Supporting Information is available online at Wiley InterScience or from the author. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2009/6/12

Y1 - 2009/6/12

N2 - A study was conducted to demonstrate a simple method for fabricating stopped high-aspect-ratio (AR) nanohairs of polyurethane acrylate (PUA) material that utilized replica molding and post-electron-beam irradiation. The method offered a facile route to prepare angled polymer nanohairs without multistep processes or surface treatment. It was demonstrated that the PUA material was molded into a geometry controlled and high-density nanochair surface with an AR of up to 10 without facing self-matting problem, due to its favorable mechanical properties. The as-formed hairy structures also allowed for structural transformation into directional and angled nanohairs, while maintaining better adhesion capability. The nanohair surface also showed significant unidirectional adhesion properties and a higher shear adhesion due to its structural similarity to natural gecko foot hairs.

AB - A study was conducted to demonstrate a simple method for fabricating stopped high-aspect-ratio (AR) nanohairs of polyurethane acrylate (PUA) material that utilized replica molding and post-electron-beam irradiation. The method offered a facile route to prepare angled polymer nanohairs without multistep processes or surface treatment. It was demonstrated that the PUA material was molded into a geometry controlled and high-density nanochair surface with an AR of up to 10 without facing self-matting problem, due to its favorable mechanical properties. The as-formed hairy structures also allowed for structural transformation into directional and angled nanohairs, while maintaining better adhesion capability. The nanohair surface also showed significant unidirectional adhesion properties and a higher shear adhesion due to its structural similarity to natural gecko foot hairs.

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EP - 2281

JO - Advanced Materials

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Stooped Nanohairs: Geometry-Controllable, Unidirectional, Reversible, and Robust Gecko-like Dry Adhesive

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