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      Well-defined colloidal crystal films from the 2D self-assembly of core–shell semi-soft nanoparticles

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          Abstract

          Silica core–polymer shell particles are obtained from surface mediated RAFT polymerisation and assembled into ordered 2D colloidal crystals.

          Abstract

          Core–shell hybrid nanoparticles are promising candidates for a wide range of applications such as waveguides, chemical and biological sensors and photonic crystals. A combination of an inorganic core comprising silica nanoparticles (SiNP) with a poly(methyl methacrylate) (PMMA) shell, obtained by reversible addition fragmentation chain transfer (RAFT) polymerization, was used to fabricate core shell nanoparticles. The surface functionalization of SiNP was successfully achieved by covalently binding the triethoxy groups of a chain transfer agent (EHT) onto the SiNP. The surface-modified SiNP were used to mediate RAFT polymerization of methyl methacrylate (MMA) by the ‘grafting from’ approach to form core–shell hybrid particles with high polymer grafting density. The use of RAFT allowed the design of two families of particles of different grafting densities, in order to establish the effect of grafting density on the particle self-organisation. We find that high grafting density enables these hybrid particles to form two-dimensional (2D) arrays in a colloidal crystal film as evidenced by TEM, SEM, EDX and AFM.

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          Living Radical Polymerization by the RAFT Process ? A Third Update

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            Colloidal self-assembly meets nanofabrication: from two-dimensional colloidal crystals to nanostructure arrays.

            Self-assembly of colloidal microspheres or nanospheres is an effective strategy for fabrication of ordered nanostructures. By combination of colloidal self-assembly with nanofabrication techniques, two-dimensional (2D) colloidal crystals have been employed as masks or templates for evaporation, deposition, etching, and imprinting, etc. These methods are defined as "colloidal lithography", which is now recognized as a facile, inexpensive, and repeatable nanofabrication technique. This paper presents an overview of 2D colloidal crystals and nanostructure arrays fabricated by colloidal lithography. First, different methods for fabricating self-assembled 2D colloidal crystals and complex 2D colloidal crystal structures are summarized. After that, according to the nanofabrication strategy employed in colloidal lithography, related works are reviewed as colloidal-crystal-assisted evaporation, deposition, etching, imprinting, and dewetting, respectively.
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              Crystallization of hard-sphere colloids in microgravity

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                Author and article information

                Journal
                PCOHC2
                Polymer Chemistry
                Polym. Chem.
                Royal Society of Chemistry (RSC)
                1759-9954
                1759-9962
                2015
                2015
                : 6
                : 41
                : 7297-7307
                Affiliations
                [1 ]Key Centre for Polymers & Colloids
                [2 ]School of Chemistry
                [3 ]The University of Sydney
                [4 ]Australia
                [5 ]Institute for Chemical Research
                [6 ]Kyoto University
                [7 ]Kyoto 611-0011
                [8 ]Japan
                [9 ]Department of Chemistry
                [10 ]The University of Warwick
                [11 ]Coventry
                [12 ]UK
                [13 ]Faculty of Pharmacy and Pharmaceutical Sciences
                Article
                10.1039/C5PY00912J
                1e854e1b-f664-4c8e-a6d6-bd8a492c02bc
                © 2015
                History

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