Hierarchical Nano/Micro Moth Eyelike Polymer Film Using Solid/Liquid Interfacial Reaction at Room Temperature

Langmuir : the ACS Journal of Surfaces and Colloids
Thuy T CaoDo S Huh

Abstract

A simple pathway for the fabrication of real moth eyelike patterned (MEP) polymer film with a double-layered nano/microhierarchical structure is demonstrated through a solid/liquid interfacial reaction at atmospheric conditions. A convex-structured polyvinyl alcohol (PVA) film containing CdCl2 was first fabricated using a self-organized honeycomb-patterned porous film as a template. The CdCl2/PVA convex film was immersed into Na2S/ethanol solution to facilitate the reaction between CdCl2 and Na2S at the solid/liquid interface, which led to the functionalization of CdS nanoparticles in the convex-structured PVA film. The tunable introduction of interfacial reaction resulted in the formation of a CdS moth eyelike nanoarray on the top surface of the PVA convex microarray, which mimicked the real moth eye (PVA-CdS MEP). PVA-CdS MEP film with a double moth eyelike structure showed improved antireflective property in comparison with flat and convex-structured PVA films. The PVA-CdS MEP film showed photoresponse under simulated solar light radiation and flexible duration after 500 cycles of folding.

References

Feb 23, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Hiroshi Yabu, Masatsugu Shimomura
Apr 13, 2006·Proceedings. Biological Sciences·D G StavengaK Arikawa
Aug 15, 2008·Nano Letters·Otto L MuskensAd Lagendijk
Aug 27, 2009·Nanotechnology·B PäivänrantaM Kuittinen
Feb 20, 2014·The Journal of Physical Chemistry Letters·Emilio J Juarez-PerezIvan Mora-Sero
Jan 27, 2016·ACS Applied Materials & Interfaces·Insung Hwang, Kijung Yong
Oct 28, 2016·ACS Applied Materials & Interfaces·Wen-Kai KuoHsin Her Yu

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