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Applied Interface Physics

Group of Prof. Markus Valtiner

Our research focuses on the broad areas of adhesion, friction as well as interfacial forces and their utilization for making better energy-saving, energy efficient, cheaper, long lasting smart materials for application in structural and functional materials. We are also interested in dynamic interaction forces, single molecular interactions and soft matter physics in confined spaces. Our aim is to gain insight into the fundamental interactions in complex interfacial processes, and to translate fundamental science into knowledge-based design of better and novel structural and functional materials for technological applications. We are in particular interested in:

  • Fundamental work on interfacial forces, interfacial structures and tribology under (electrochemically active) variable environmental conditions.
  • The effect of (electro-)chemical reactions on interfacial interactions with a particular focus on structural effects in confined spaces and complex environments.
  • Characterization of specific interactions and recognition in biologic systems
  • Design of novel experiments for measuring surface forces
  • Measurement, understanding and ultimately prediction of properties of surfaces, interfaces and thin films over large length and time scales.
  • Design and utilization of model experiments and tunable thin films and interfaces using unique bio-mimetic and molecular design concepts.
  • Development and establishment of new experimental techniques for surface and interface analysis.
  • Preparation and characterization of advanced functional materials with smart properties.
  • Corrosion and reactivity in confined spaces (crevice corrosion, SCC)
  • Structuring of ionic liquids and solutions of ionic liquids at charged and uncharged interfaces

Group news

Recent work

Crevice corrosion

In situ nano- to microscopic imaging and growth mechanism of electrochemical dissolution (e.g., corrosion) of a confined metal surface

Reactivity in confinement is central to a wide range of applications and systems, yet it is notoriously difficult to probe reactions in confined spaces in real time. Using a modified electrochemical surface forces apparatus (EC-SFA) on confined metallic surfaces, we observe in situ nano- to microscale dissolution and pit formation in well-defined geometries in environments relevant to corrosion processes. Read more in PNAS.

Workfluctuations and free energy estimator convergence

One molecule at the time: Probing surface-to-molecule bonds - Bias and work dissipation

The capabilities of Atomic Force Microscopes and Optical Tweezers to probe unfolding or surface-to-molecule bond rupture at a single-molecular level are widely appreciated. Our recent results provide new insights into stability and work dissipation mechanisms at adhesive interfaces at the single-molecular level, and offer important design and analysis aspects for single-molecular surface-to-molecule experiments. Want to know more? Read our article in this Langmuir special issue.

interface/index.txt · Last modified: 2017-11-20 13:10 by Markus Valtiner