Simulationen zur Hydrationslubrikation zwischen Oberflächen

• Antragsteller: Professor Dr. Roland Netz
• Fachliche Zuordnung: Statistische Physik, Nichtlineare Dynamik, Komplexe Systeme, Weiche und fluide Materie, Biologische Physik
• Förderung: Förderung von 2015 bis 2018
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 269080843

• Erstellungsjahr: 2018

Zusammenfassung der Projektergebnisse

Summarizing our results, we have determined how the friction between biological surfaces depends on normal load and interlayer spacing, and we propose a heuristic expression describing the crossover from hydrodynamic friction to hydration lubrication. Furthermore, we have studied how the surface chemistry, including surface charge and polarity, as well as the presence of ions affect the structure of the interfacial layer. Finally, we have developed an analytical continuum model capable of extracting the interfacial viscosity, which is an important parameter appearing in the heuristic theory of hydration lubrication, from standard electrokinetic experiments.

Projektbezogene Publikationen (Auswahl)

• Atomistic Simulations of Wetting Properties and Water Films on Hydrophilic Surfaces. J. Chem. Phys. 146:164705, 2017
  M. Kanduč and R. R. Netz
  
• Hydration Friction in Nanoconfinement: From Bulk via Interfacial to Dry Friction. Nano Lett. 17:5969–5976, 2017
  A. Schlaich, J. Kappler and R. R. Netz
  
• Orientation-Induced Adsorption of Hydrated Protons at the Air-Water Interface. Angew. Chem. Int. Ed. 56:15846–15851, 2017
  S. I. Mamatkulov, C. Allolio, R. R. Netz and D. J. Bonthuis
  
• Power-law Electrokinetic Behavior as a Direct Probe of Effective Surface Viscosity. Chem. Phys Lett. 670:11–15, 2017
  Y. Uematsu, R. R. Netz and D. J. Bonthuis
  
• Analytical Interfacial Layer Model for the Capacitance and Electrokinetics of Charged Aqueous Interfaces. Langmuir 34:9097–9113, 2018
  Y. Uematsu, R. R. Netz and D. J. Bonthuis
  
• Anomalous Electrokinetics at Hydrophobic Surfaces: Effects of Ion Specificity and Interfacial Water Structure. Electrochim. Act. 259:1011–1020, 2018
  Q. Cao and R. R. Netz