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Colloidal crystals made of poly(N-isopropylacrylamide) microgel particles

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Abstract

Poly (N-isopropylacrylamide) microgel particles are found to form colloidal crystals similar to those occurring in typical hard-sphere colloids like poly(methylmethacrylate) beads. Samples made of particles with different cross-linker concentrations are investigated and their deswelling ratio is determined using dynamic light scattering. Small-angle neutron scattering data are also presented and analysed in terms of a face-centred-cubic crystal structure. The characteristic length, a, of the elementary cell is found to be 535 ± 16 and 495 ± 15 nm for the two systems investigated. This leads to particle radii of 189 ± 6 and 175 ± 5 nm, respectively. These values compare well to the radii determined using several different methods.

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Authors and Affiliations

  1. TU Chemnitz, Institut für Physik Materialforschung und Flüssigkeiten 09107 Chemnitz, Germany e-mail: T.Hellweg@physik.tu-chemnitz.de, Germany

    T. Hellweg

  2. Institut Laue-Langevin Avenue des Martyrs BP156, 38042 Grenoble Cedex 9, France, France

    C. D. Dewhurst

  3. Universität Essen Institut für Umweltanalytik Universitätsstrasse 3-5, 45141 Essen Germany, Germany

    E. Brückner

  4. Universität Bielefeld Fakultät für Chemie Physikalische Chemie 1 33615 Bielefeld, Germany, Germany

    K. Kratz & W. Eimer

Authors
  1. T. Hellweg
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  2. C. D. Dewhurst
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  3. E. Brückner
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  4. K. Kratz
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  5. W. Eimer
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Received: 26 July 1999/Accepted: 21 March 2000

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Hellweg, T., Dewhurst, C., Brückner, E. et al. Colloidal crystals made of poly(N-isopropylacrylamide) microgel particles. Colloid Polym Sci 278, 972–978 (2000). https://doi.org/10.1007/s003960000350

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  • DOI: https://doi.org/10.1007/s003960000350

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