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Showing 1–6 of 6 results
Advanced filters: Author: Fivos Perakis Clear advanced filters

  • Protein motion in crowded environments governs cellular transport and reaction rates. Here, the authors use megahertz X-ray Photon Correlation Spectroscopy to reveal anomalous diffusion of ferritin, linking hydrodynamic and direct interactions to cage-trapping at microsecond time scales.

    • Anita Girelli
    • Maddalena Bin
    • Fivos Perakis
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-13

  • The dynamics of liquid water is rich due to its complex, highly disordered hydrogen-bond network, which hasn’t been fully understood. Perakis et al. measure water dynamics at sub-100 fs and show that it cannot be described by simple thermal motion due to the build-up of tetrahedral structures upon supercooling.

    • Fivos Perakis
    • Gaia Camisasca
    • Anders Nilsson
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-10

  • The authors investigate the impact of glycerol on the structure, density fluctuations, and hypothesized liquid-liquid phase transition of water using ultrafast X-ray scattering combined with rapid evaporative cooling, contributing to understanding the role of glycerol as a cryoprotectant.

    • Sharon Berkowicz
    • Iason Andronis
    • Fivos Perakis
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-12

  • The European X-ray FreeElectron Laser Facility generates ultrashort hard X-ray pulses with megahertz repetition rate. Here, the authors probe the dynamics of dense antibody protein (Ig-PEG) solutions using megahertz X-ray photon correlation spectroscopy at the European XFEL.

    • Mario Reiser
    • Anita Girelli
    • Christian Gutt
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-10

  • The phase transition between water and ice is a ubiquitous phenomenon in nature. Here, the authors conduct a time-resolved x-ray scattering experiment using X-ray Free Electron Lasers to elucidate a comprehensive picture of the melting and recrystallization dynamics of crystalline ice, based on direct structural information.

    • Cheolhee Yang
    • Marjorie Ladd-Parada
    • Kyung Hwan Kim
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-7

  • Obtaining experimental evidence of a liquid-liquid phase transition in supercooled water is challenging due to the rapid crystallization. Here the authors drive low-density amorphous ice to the conditions of liquid-liquid coexistence using ultrafast laser heating and observe the liquid-liquid phase transition with femtosecond x-ray laser pulses.

    • Katrin Amann-Winkel
    • Kyung Hwan Kim
    • Anders Nilsson
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-8