Funding period: 2021 – 2024

Project leaders: Matthias Fuchs and Andreas Zumbusch

Scientific staff: Martin von Bischopinck, Niklas Grimm, Stefan Gerlach, Martin Winterhalder
 

Recent work in generalized fluctuating hydrodynamics predicts the persistence of stress and strain correlations in viscoelastic liquids over long distances. To date these correlations have not yet been investigated although important consequences on the formation of thin polymeric films are expected. We will develop an experimental method for monitoring stress and strain on a microscopic scale in viscoelastic polymer liquid films with high spatial and temporal resolution. This will allow cross-correlation of these fluctuations over mesoscopic distances in order to derive the far-field patterns also under flow. The analysis will be based on theoretical studies of the coupling of stress fields in polymer liquids to fluctuating interfaces incorporating macromolecular length and time scales.

List of publications

Current preprint

• Verification of Perrin's theory of the motion of dilute spheroidal colloids
  J. D. Geiger, M. Alhissi, M. Voggenreiter, M.Fuchs, and A. Zumbusch
  ArXiv2405.03304
   
• Nonlinear microrheology with time-dependent forces -- Application to recoils in viscoelastic fluids
  N. Ditz, A. M. Puertas, and M. Fuchs
  arXiv:2404.19085 - published 29 April 2024

2024

• Long ranged stress correlations in the hard sphere liquid
  N. Grimm, M. von Bischopinck, A. Zumbusch, and M. Fuchs
  J. Chem. Phys. 161, 144118 - published 14 October 2024
   
• Temporal Evolution of Interparticle Potentials of PMMA Colloids in CHB/Decalin
  M.Rudolf, and A. Zumbusch
  Langmuir 2024, 40, 31, 16085–16092 - published 25 July 2024
   
• Decoupling of rotation and translation at the colloidal glass transition
  J. Geiger, N. Grimm, M. Fuchs, and A. Zumbusch
  J. Chem. Phys., 161, 014507- published 03 July 2024
   
• Observation of Liquid Glass in Molecular Dynamics Simulations
  M. Alhissi, A. Zumbusch, and M. Fuchs 
  J. Chem. Phys, 160, 164502 - published 28 April 2024

2023

• Active and passive microrheology with large tracers in hard colloids
  F. Orts, M. Maier, M. Fuchs, G. Ortega, E. M. Garzón, and A. M. Puertas
  J. Chem. Phys. 159, 144901 - published 14 October 2023
   
• The BKT transition and its dynamics in a spin fluid
  T. Bissinger and M. Fuchs
  J. Chem. Phys. 158, 044902 - published 23 January 2023
   
• How are mobility and friction related in viscoelastic fluids
  J. Caspers, N. Ditz, K. K. Kumar, F. Ginot, C. Bechinger, M. Fuchs, and M. Krüger
  J. Chem. Phys. 158, 024901 - published 14 January 2023

2022

• Simple fluid with broken time-reversal invariance

  Niklas Grimm, Annette Zippelius, and Matthias Fuchs
  Phys. Rev. E 106, 034604 – published 08 September 2022

Further Publications

• Heterogeneous Diffusion in Thin Polymer Films As Observed by High-Temperature Single-Molecule Fluorescence Microscopy
  B. M. I. Flier, M. C. Baier, J. Huber, K. Müllen, S. Mecking, A. Zumbusch, and D. Wöll
  J. Am. Chem. Soc. 2012, 134, 1, 480 - published 16 November 2011
   
• Strain Pattern in Supercooled Liquids
  B. Illing, S. Fritschi, D. Hajnal, C. Klix, P. Keim, and M. Fuchs
  Phys. Rev. Lett. 117, 208002 – published 8 November 2016
   
• Emergence of Long-Ranged Stress Correlations at the Liquid to Glass Transition
  M. Maier, A. Zippelius, and M. Fuchs
  Phys. Rev. Lett. 119, 265701 – published 29 December 2017
   
• Long-range strain correlations in 3D quiescent glass forming liquids
  M. Hassani, E. M. Zirdehi, K. Kok, P. Schall, M. Fuchs, and F. Varnik
  EPL 124, 18003 - published 5 November 2018
   
• Detection and tracking of anisotropic core-shell colloids
  J. Roller, P. Pfleiderer, J.-M. Meijer, and A. Zumbusch
  J. Phys.: Condens. Matter 30, 395903 - published 11 September 2018
   
• Emergence of Goldstone excitations in stress correlations of glass-forming colloidal dispersions
  F. Vogel, A. Zippelius, and M. Fuchs
  EPL 125, 68003 - published 26 April 2019
   
• Formation of nematic order in 3D systems of hard colloidal ellipsoids
  J. Roller, J. D. Geiger, M. Voggenreiter,J.-M. Meijer, and  A. Zumbusch
  Soft Matter, 16, 1021 - published 12 December 2019
   
• Observation of liquid glass in suspensions of ellipsoidal colloids
  J. Roller, A. Laganapan, J.-M. Meijer, M. Fuchs, and A. Zumbusch
  PNAS 118, 3 - published 19 January 2021