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Light-Induced Reversible Formation of Polymeric Micelles

Authors

  • Hyung-il Lee,

    1. Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA, Fax: (+1) 412-268-6897
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  • Wei Wu,

    1. Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA, Fax: (+1) 412-268-6897
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  • Jung Kwon Oh,

    1. Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA, Fax: (+1) 412-268-6897
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  • Laura Mueller,

    1. Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA, Fax: (+1) 412-268-6897
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  • Gizelle Sherwood,

    1. Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA, Fax: (+1) 412-268-6897
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  • Linda Peteanu Prof.,

    1. Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA, Fax: (+1) 412-268-6897
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  • Tomasz Kowalewski Prof.,

    1. Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA, Fax: (+1) 412-268-6897
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  • Krzysztof Matyjaszewski Prof.

    1. Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA, Fax: (+1) 412-268-6897
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  • The authors thank the National Science Foundation (DMR-05-49353 and ECS01-03307). The authors also thank Prof. Brent Sumerlin for helpful discussions.

Abstract

original image

Reversible disruption and regeneration of block-copolymer micelles has been achieved by UV and visible-light irradiation and studied by atomic force microscopy (see picture). A hydrophobic dye encapsulated in the original polymeric micelles was released after UV irradiation. Remarkably, some of the released hydrophobic dye was re-encapsulated on regeneration of the micelles by irradiation with visible light.

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