Mukherjee, Rabibrata and Gonuguntla, Manoj and Sharma, Ashutosh (2007) Meso-patterning of thin polymer films by controlled dewetting: from nano-droplet arrays to membranes. Journal of Nanoscience and Nanotechnology , 7 (6). pp. 2069-2075. ISSN 1533-4880

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Abstract

Controlled dewetting of thin polymer films on physically heterogeneous substrates is employed as a new soft lithography route to obtain various types of ordered meso-scale structures, including nano-membranes and ordered arrays of nano-droplets. Dewetting of a thin polymer film on a defect free homogeneous surface occurs by a randomly placed collection of holes and droplets with a welldefined spacing. In contrast, on a physically patterned surface, strong influence of the underlying pattern is observed on the dewetting pathways as well as on the ordering and size of the resulting meso-scale structures. The imposed periodicity of the substrate pattern vis-à-vis the spinodal length scale of dewetting provides a powerful tool for the morphology and size control. The thickness of the film and the kinetics of dewetting are the other important parameters that govern the morphology of the resulting structures.

Item Type:	Article
Uncontrolled Keywords:	Thin Film; Surface Instability; Dewetting; Self-Organized Structure; Mesoscopic Self-Assembly
Subjects:	Crystal Chemistry, Thermodynamics, Phase Equilibria
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	15 Mar 2012 07:33
Last Modified:	15 Mar 2012 07:33
URI:	http://cgcri.csircentral.net/id/eprint/1226

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