Shape-Tunable Core−Shell Microparticles

Klein, Matthias; Saenger, Nicolai; Schuetter, Stefan; Pfleiderer, Patrick; Zumbusch, Andreas

Shape-Tunable Core−Shell Microparticles

Dateien

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Datum

2014

Autor:innen

Klein, Matthias

Saenger, Nicolai

Schuetter, Stefan

Pfleiderer, Patrick

Zumbusch, Andreas

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Chemie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Langmuir. 2014, 30(42), pp. 12457-12464. ISSN 0743-7463. eISSN 1520-5827. Available under: doi: 10.1021/la500504u

Zusammenfassung

Colloidal polymer particles are an important class of materials finding use in both everyday and basic research applications. Tailoring their composition, shape, and functionality is of key importance. In this article, we describe a new class of shape-tunable core–shell microparticles. They are composed of a cross-linked polystyrene (PS) core and a poly(methyl methacrylate) (PMMA) shell of varying thickness. In the first step, we prepared highly cross-linked PS cores, which are subsequently transferred into a nonpolar dispersant. They serve as the seed dispersion for a nonaqueous dispersion polymerization to generate the PMMA shell. The shape of the particles can subsequently be manipulated. After the shell growth stage, the spherical PS/PMMA core–shell colloids exhibit an uneven and wrinkled surface. An additional tempering procedure allows for smoothing the surface of the core–shell colloids. This results in polymer core–shell particles with a perfectly spherical shape. In addition to this thermal smoothing of the PMMA shell, we generated a selection of shape-anisotropic core–shell particles using a thermomechanical stretching procedure. Because of the unique constitution, we can selectively interrogate molecular vibrations in the PS core or the PMMA shell of the colloids using nonlinear optical microscopy techniques. This is of great interest because no photobleaching occurs, such that the particles can be tracked in real space over long times.

Fachgebiet (DDC)

540 Chemie

Zitieren

ISO 690

KLEIN, Matthias, Nicolai SAENGER, Stefan SCHUETTER, Patrick PFLEIDERER, Andreas ZUMBUSCH, 2014. Shape-Tunable Core−Shell Microparticles. In: Langmuir. 2014, 30(42), pp. 12457-12464. ISSN 0743-7463. eISSN 1520-5827. Available under: doi: 10.1021/la500504u

BibTex

@article{Klein2014Shape-28998,
  year={2014},
  doi={10.1021/la500504u},
  title={Shape-Tunable Core−Shell Microparticles},
  number={42},
  volume={30},
  issn={0743-7463},
  journal={Langmuir},
  pages={12457--12464},
  author={Klein, Matthias and Saenger, Nicolai and Schuetter, Stefan and Pfleiderer, Patrick and Zumbusch, Andreas}
}

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Universitätsbibliographie

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