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Stretched Polymer Nanohairs by Tailored Capillarity and Adhesive Force

Published online by Cambridge University Press:  01 February 2011

Hoon Eui Jeong ,
Sung Hoon Lee ,
Pilnam Kim  and
Kahp Y. Suh
Hoon Eui Jeong
Affiliation:
[email protected], Seoul National University, aSchool of Mechanical and Aerospace Engineering, Seoul National University, San 56-1, Sillim-Dong, Kwanak-Gu, Seoul, 151-742, Korea, Republic of
Sung Hoon Lee
Affiliation:
[email protected], Seoul National University, School of Mechanical and Aerospace Engineering, Seoul, 151-742, Korea, Republic of
Pilnam Kim
Affiliation:
[email protected], Seoul National University, School of Mechanical and Aerospace Engineering, Seoul, 151-742, Korea, Republic of
Kahp Y. Suh
Affiliation:
[email protected], Seoul National University, School of Mechanical and Aerospace Engineering, Seoul, 151-742, Korea, Republic of
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Abstract

We present a simple method for fabricating high aspect-ratio polymer nanostructures on a solid substrate by sequential application of molding and drawing of a thin polymer film. In this method, a thin polymer film is prepared by spin coating on a solid substrate and the temperature is raised above the polymer¡¯s glass transition while in conformal contact with a poly(urethane acrylate) (PUA) mold having nano-cavities. Consequently, capillary forces induces deformation of the polymer melt into the void spaces of the mold and the filled nanostructure was further elongated upon removal of the mold due to tailored adhesive force at the mold/polymer interface. The optimum value of the work of adhesion at the mold/polymer interface ranged from 0.9 to 1.1 times that at the substrate/polymer interface. Below or above this range, a simple molding or detachment occurred, corresponding to earlier findings.

Keywords

nanostructurepolymeradhesion
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 948: Symposium B – Structure, Processing and Properties of Polymer Nanofibers for Emerging Technologies , 2006 , 0948-B05-09
Copyright
Copyright © Materials Research Society 2007

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References

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