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Issue 18, 2014
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Versatile dendrimer-derived nanocrystal microreactors towards fluorescence colloidal photonic crystals

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Abstract

The ability to finely bind colloidal photonic crystals with nanocrystals (NCs) is critical in many applications ranging from light-emitting devices to flexible displays and biological labels. Herein, the use of carbosilane–thioether generation 2 vinyl-terminated (G2-Vi) dendrimers facilitates zero dimensional (0D) and two dimensional (2D) microreactors with high-uptake NCs, allowing them to generate fluorescent colloidal photonic crystals. Dendrimer-functionalized microspheres were prepared by seeded copolymerization from micrometer-sized polystyrene (PS) seed particles and G2-Vi dendrimers. As an independent 0D microreactor, such dendrimer-functionalized microsphere latices bearing abundant thioether anchor sites can capture guest metal ion components, followed by the introduction of chalcogenides, and hence the in situ generation of higher-uptake NCs was realized. Furthermore, the as-obtained NC–latex hybrids from 0D microreactors were directly self-assembled into large-scale ordered colloidal arrays with uniform fluorescence. Additionally, compact assemblies from the Cd2+-loaded dendrimer-functionalized microspheres were constructed and were employed as a large-scale 2D reactor. An on-demand fluorescence pattern was freely and quickly displayed via a reaction-induce-response process by screen stencil oriented printing.

Graphical abstract: Versatile dendrimer-derived nanocrystal microreactors towards fluorescence colloidal photonic crystals

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Publication details

The article was received on 22 Dec 2013, accepted on 11 Feb 2014 and first published on 11 Feb 2014


Article type: Paper
DOI: 10.1039/C3TC32533D
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J. Mater. Chem. C, 2014,2, 3610-3616

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    Versatile dendrimer-derived nanocrystal microreactors towards fluorescence colloidal photonic crystals

    J. Zhang, L. Ling, C. Wang, S. Chen, L. Chen and D. Y. Son, J. Mater. Chem. C, 2014, 2, 3610
    DOI: 10.1039/C3TC32533D

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