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pH- and Ion-responsive Membranes from Self-Assembly/Sintering of SiO2@Au Core-Shell Nanospheres

Published online by Cambridge University Press:  20 March 2013

Patricia Anne A. Ignacio-de Leon  and
Ilya Zharov
Patricia Anne A. Ignacio-de Leon
Affiliation:
Department of Chemistry, University of Utah, Salt Lake City, UT 84112, USA
Ilya Zharov
Affiliation:
Department of Chemistry, University of Utah, Salt Lake City, UT 84112, USA
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Abstract

We prepared colloidal crystals by self-assembly of gold-coated silica nanospheres, and formed free-standing nanoporous membranes by sintering these colloidal crystals. We modified the nanopore surface with ionizable functional groups, by forming a monolayer of L-cysteine or by surface-initiated polymerization of methacrylic acid. Diffusion experiments for neutral and cationic dyes showed that transport through these surface-modified Au-coated colloidal membranes can be controlled by pH and presence of metal cations.

Keywords

nanostructureself-assemblysintering
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1502: Symposium T – Membrane Material Platforms and Concepts for Energy, Environment and Medical Applications , 2013 , mrsf12-1502-t06-22
Copyright
Copyright © Materials Research Society 2013

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