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Showing 1–8 of 8 results
Advanced filters: Author: Michael Marek Koza Clear advanced filters

  • The low thermal conductivity in filled skutterudites has been ascribed to rattling atoms inducing a phonon glass. Experimental evidence now shows that the phonon glass description is incorrect, and provides essential insight for the development of microscopic models aimed at describing the thermoelectric properties of these materials.

    • Michael Marek Koza
    • Mark Robert Johnson
    • Didier Ravot
    Research
    Nature Materials
    Volume: 7, P: 805-810

  • Quasi-elastic neutron scattering measurements show the existence of a body-centred cubic structure, similar to that of ice VII, where water molecules exhibit picosecond rotational dynamic and rapid orientational jumps characteristic of liquid water.

    • Maria Rescigno
    • Alberto Toffano
    • Livia Eleonora Bove
    ResearchOpen Access
    Nature
    Volume: 640, P: 662-667

  • Within the phase diagram of pure substances, the supercritical state is not fully understood. Here the authors experimentally observe a gas-like to liquid-like crossover in the self-dynamics of supercritical fluid methane upon pressure increase.

    • Umbertoluca Ranieri
    • Ferdinando Formisano
    • Livia E. Bove
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-10

  • Methane is abundant in the Universe, is an important energy carrier and a model system for fundamental studies. Here, the authors measure the self-diffusion coefficient of supercritical methane at ambient temperature up to the freezing pressure, and find a different behavior than expected based on previous models.

    • Umbertoluca Ranieri
    • Stefan Klotz
    • Livia E. Bove
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-9

  • Methane dynamics at the interface of ice clathrate structures is expected to play a role in phenomena ranging from gas exchange to methane mobility in planetary cryospheres. Here, the authors observe extremely fast methane diffusion at the interface of the two most common clathrate hydrate structures.

    • Umbertoluca Ranieri
    • Michael Marek Koza
    • Livia E. Bove
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-7