Foivos PerakisAssociate professor

About me

I am originally from Greece and my name is pronounced "Fee-vos", written also as "Fivos". 

My group develops and utilizes X-ray scattering techniques to study the molecular structure and dynamics of aqueous solutions and supercooled liquids, as wells of proteins in crowded and cryogenic environments. Experiments involve Time-resolved X-Ray Diffraction and X-ray Photon Correlation Spectroscopy (XPCS) measurements at large X-ray facilities worldwide, such as X-ray storage rings and X-ray Free-Electron Lasers (XFELs).

See official group website.

Brief Biography

2025 Associate Professor, Stockholm University
2022 Docent, Department of Physics, Stockholm University
2019 Assistant Professor, Stockholm University
2016 Researcher, Stockholm University
2014 Postdoc at SLAC, Stanford University
2014 PhD in Physical Chemistry, University of Zurich
2008 Diploma in Physics, University of Crete

See here for CV

Selected Publications

• Coherent X-rays reveal anomalous molecular diffusion and cage effects in crowded protein solutions, A. Girelli, M. Bin, M. Filianina, M. Dargasz, N. Das Anthuparambil, J. Möller, A. Zozulya, I. Andronis, S. Timmermann, S. Berkowicz, S. Ret- zbach, M. Reiser, A. M. Raza, M. Kowalski, M. Sayed Akhundzadeh, J. Schrage, C. Hee Woo, M. D. Senft, L. F. Reichart, A. Leonau, P. P. Raja- iah, W. Chèvremont, T. Seydel, J. Hallmann, A. Rodriguez-Fernandez, J.-E. Pudell, F. Brausse, U. Boesenberg, J. Wrigley, M. Youssef, W. Lu, W. Jo, R. Shayduk, A. Madsen, F. Lehmkühler, M. Paulus, F. Zhang, F. Schreiber, C. Gutt, and F. Perakis,
  arXiv:2410.08873 [cond-mat.soft] (2024)
   
• Supercritical density fluctuations and structural heterogeneity in supercooled water-glycerol microdroplets
  S. Berkowicz*, I. Andronis*, A. Girelli, M. Filianina, M. Bin, K. Nam, M. Shin, M. Kowalewski, T. Katayama, N. Giovambattista, K. H. Kim, and F. Perakis (*equal contribution)
  Nature Commun., 15, 10610 (2024)
   
• Nanocrystallites Modulate Intermolecular Interactions in Cryoprotected Protein Solutions
  M. Filianina, M.Bin, S. Berkowicz, M. Reiser, H. Li, S. Timmermann, M. Blankenburg, K. Amann-Winkel, C. Gutt and F. Perakis
  J. Phys. Chem. B, 127, 6197-6204 (2023)
   
• Coherent X-ray Scattering Reveals Nanoscale Fluctuations in Hydrated Proteins
  M. Bin, M. Reiser, M. Filianina, S. Berkowicz, S. Das, S. Timmermann, W. Roseker, R. Bauer, J. Öström, A. Karina, K. Amann-Winkel, M. Ladd-Parada, F. Westermeier, M. Sprung, J. Möller, F. Lehmkühler, C. Gutt and F. Perakis  
  J. Phys. Chem. B 127, 4922-4930 (2023)
   
• Nanofocused x-ray photon correlation spectroscopy [highlighted as Editor’s choice]
  S. Berkowicz, S. Das, M. Reiser, M. Filianina, M. Bin, G. Crevatin, F. Hennies, C. Weninger, A. Björling, P. Bell, and F. Perakis,
  Phys. Rev. Res., 4, L032012 (2022)
   
• Resolving molecular diffusion and aggregation of antibody proteins with megahertz X-ray free-electron laser pulses [highlighted on the anual report of EuXFEL]
  M. Reiser*, A. Girelli, A. Ragulskaya, S. Das, S. Berkowicz, M. Bin, M. Ladd-Parada, M. Filianina, H.-F. Poggemann, N. Begam, M. S. Akhundzadeh, S. Timmermann, L. Randolph, Y. Chushkin, T. Seydel, U. Boesenberg, J. Hallmann, J. Möller, A. Rodriguez-Fernandez, R. Rosca, R. Schaffer, M. Scholz, R. Shayduk, A. Zozulya, A. Madsen, F. Schreiber, F. Zhang, F. Perakis* and C. Gutt* [*corresponding authors]
  Nature Commun. 13, 5528 (2022)
   
• Exploring the validity of the Stokes-Einstein relation in supercooled water at nanometer length scales using nanomolecular probes [selected as front cover]
  S. Berkowicz and F. Perakis 
  Phys. Chem. Chem. Phys., 23, 25490 (2021)
   
• Wide-angle X-ray scattering and molecular dynamics simulations of supercooled protein hydration water [selected as "Hot article", back cover]
  M. Bin, R. Yousif, S. Berkowicz, S. Das, D. Schlesinger, and F. Perakis
  Phys. Chem. Chem. Phys. 23, 18308-18313 (2021)
   
• Anisotropic X-ray Scattering of Transiently Oriented Water
  K. H. Kim, A. Späh, H. Pathak, C. Yang, S. Bonetti, K. Amann-Winkel, D. Mariedahl, D. Schlesinger, J. A. Sellberg, D. Mendez, G. van der Schot, H. Y. Hwang, J. Clark, O. Shigeki, T. Tadashi, Y. Harada, H. Ogasawara, T. Katayama, A. Nilsson, and F. Perakis
  Phys. Rev. Lett. 125, 076002 (2020)
   
• Brine rejection and crystallite formation upon freezing NaCl aqueous solutions
  I. Tsironi, D. Schlesinger, A. Späh, L. Erikssonr M. Segad, F. Perakis
  Phys. Chem. Chem. Phys. 22, 7625-7632 (2020)
   
• See here for a full list of publications