Stockholms universitet

Foivos PerakisBiträdande lektor

Om mig

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).

Selected Publications

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)


Research Activity and Education



Docent in Physics

Department of Physics, Stockholm University



Assistant Professor

Department of Physics, Stockholm University

2016 - 2018



Department of Physics, Stockholm University

2014 - 2016


Postdoctoral Scholar

SLAC National Accelerator Laboratory, Stanford University



Visiting Research Scholar

Center for Quantum Complexity & Nanotechnology, University of Crete

2008 - 2013


Ph.D. in Physical Chemistry

Institute of Physical Chemistry, University of Zurich

2004 - 2005


Erasmus studies

Physics Department, University of Amsterdam

2002 - 2008


Diploma in Physics

Physics Department, University of Crete


Fellowships and Awards


Wallenberg Academy Fellow (WAF) (URL)


MSCA-PF, Marie Skłodowska-Curie Actions, European Comission (URL)


VR Project Grant NT, Swedish Research Council (2023-05339)


Nordita grant, main organiser for workshop on "Fluctuations in soft mattter" (URL)


MSCA-COFUND, Marie Skłodowska-Curie Actions, European Comission (URL)


Ivar Bendixsons, stipendiefond för docenter


Wenner-Gren Stiftelserna, host for postdoc scholarship (URL)


Carl Tryggers Stiftelse, host for postdoc scholarship (URL)


VR Starting Grant, Swedish Research Council (2019-05542)


Röntgen-Ångström Cluster grant, Swedish Research Council (2019-06075)


Centre for Molecular Water Science (CMWS), Deutsches Elektronen-Synchrotron (URL)


Max-Water, Max Planck Institute initiative, funding for water research (URL)


Early Postdoc Mobility Fellowship, Swiss National Science Foundation (P2ZHP2-148666)


Chemistry Travel Award, Best Poster SCS-DSM, Swiss Chemical Society (SCS)



Modern X-ray Science: Theory and Applications, Master course (FK7067)

Project in Experimental Modern Physics, Bachelor course (FK5026)

Surface and Liquid Physics, PhD course (FK40003)