Phys Chem Chem Phys. 2016 Mar 14;18(10):7367-73. doi: 10.1039/c6cp00012f. Epub 2016 Feb 22.

Amino-functionalized breath-figure cavities in polystyrene-alumina hybrid films: effect of particle concentration and dispersion.

Physical chemistry chemical physics : PCCP

Lakshmi V, Annu Raju, Resmi V G, Jerin K Pancrecious, Rajan T P D, Pavithran C

PMID: 26899425 DOI: 10.1039/c6cp00012f

Abstract

We report the formation of breath-figure (BF) patterns with amino-functionalized cavities in a BF incompatible polystyrene (PS) by incorporating functionalized alumina nanoparticles. The particles were amphiphilic-modified and the modifier ratio was regulated to achieve a specific hydrophobic/hydrophilic balance of the particles. The influence of the physical and chemical properties of the particles like particle concentration, the hydrophobic/hydrophilic balance, etc., on particle dispersion in solvents having different polarity and the corresponding changes in the BF patterns have been studied. The amphiphilic-modified alumina particles could successfully assist the BF mechanism, generating uniform patterns in polystyrene films with the cavity walls decorated with the functionalized alumina particles, even from water-miscible solvents like THF. The possibility of fabricating free-standing micropatterned films by casting and drying the suspension under ambient conditions was also demonstrated. The present method opens up a simple route for producing functionalized BF cavities, which can be post-modified by a chemical route for various biological applications.

Publication Types

• Journal Article
• Research Support, Non-U.S. Gov't