Advanced Materials

Temperature-Controlled Transitions Between Glass, Liquid, and Gel States in Dense p-NIPA Suspensions

Authors

  • Giovanni Romeo,

    Corresponding author
    1. Department of Physics & SEAS, Harvard University, 40 Oxford Street, Cambridge, MA 02138 (USA)
    2. Department of Materials Engineering and Production, University of Napoli Federico II, Piazzale Tecchio 80 Naples 80125 (Italy)
    • Department of Physics & SEAS, Harvard University, 40 Oxford Street, Cambridge, MA 02138 (USA).
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  • Alberto Fernandez-Nieves,

    1. Department of Physics & SEAS, Harvard University, 40 Oxford Street, Cambridge, MA 02138 (USA)
    2. School of Physics, Georgia Institute of Technology, 837 State Street, Atlanta, GA 30332 (USA)
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  • Hans M. Wyss,

    1. Department of Physics & SEAS, Harvard University, 40 Oxford Street, Cambridge, MA 02138 (USA)
    2. WTB/MaTe & ICMS. WH 4.145, PO Box 513, Eindhoven University of Technology, 5600 MB Eindhoven (The Netherlands)
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  • Domenico Acierno,

    1. Department of Materials Engineering and Production, University of Napoli Federico II, Piazzale Tecchio 80 Naples 80125 (Italy)
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  • David A. Weitz

    1. Department of Physics & SEAS, Harvard University, 40 Oxford Street, Cambridge, MA 02138 (USA)
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Abstract

The elastic modulus, Gp, of concentrated suspensions of thermoresponsive microgel particles highlights transitions between glassy, liquidlike, and gel-like behavior as the temperature is varied. Approaching the low critical solution temperature of the particles, Tc ≈ 29 °C, the material undergoes solid-to-liquid transitions even above random close packing and irrespective of particle concentration.

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