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Issue 29, 2015
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Controlling the coassembly of highly amphiphilic block copolymers with a hydrolytic sol by solvent exchange

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Abstract

The coassembly of an inorganic sol by organic structure-directing agents is a widely established technique for solution processed mesoporous metal oxides. Block copolymers with highly amphiphilic blocks are promising candidates for fast and robust material assembly into a range of periodic nano-morphologies. The high polarity difference is however an inherent challenge for the simultaneous processing of hydrophilic and hydrophobic components. Here, we show that a solvent exchange through the evaporation of the initial volatiles and redissolution in an azeotrope mixture of polar and apolar solvents with a common high boiling point allows the evolution of a micellar solution towards block copolymer-dictated structures near thermodynamic equilibrium, with controlled access to inorganic cylinders, lamellae and organic cylinders within a continuous inorganic matrix.

Graphical abstract: Controlling the coassembly of highly amphiphilic block copolymers with a hydrolytic sol by solvent exchange

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Publication details

The article was received on 14 Jan 2015, accepted on 20 Feb 2015 and first published on 20 Feb 2015


Article type: Communication
DOI: 10.1039/C5RA00836K
Citation: RSC Adv., 2015,5, 22499-22502
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    Controlling the coassembly of highly amphiphilic block copolymers with a hydrolytic sol by solvent exchange

    S. Guldin, M. Stefik, H. Sai, U. Wiesner and U. Steiner, RSC Adv., 2015, 5, 22499
    DOI: 10.1039/C5RA00836K

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