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Archiv-Übersicht     Angebot Nr. 13930

Angebotsdatum: 7. Juli 2020
Art der Stelle: Doktorarbeit
Fachgebiet: Physik > Nanophysik
Titel des Themas: Sliding friction in liquid environments: A nanotribology study

Institut: Otto Schott Institute of Materials Research
Adresse:
Prof. Enrico Gnecco
Löbdergraben 32
07743 Jena
Tel.:    Fax.:
Bundesland: Thüringen
Homepage: http://https://www.mfm.uni-jena.de/
E-Mail Kontakt: mail

Beschreibung: Understanding the influence of the surrounding environment on the sliding friction between two solid surfaces in liquids is of utmost importance for applications to MEMS/NEMS or colloidal systems as well as to shed light on the dynamics of formation and rupture of single contact junctions. In this project we aim to perform an experimental investigation of the mechanical properties of contacts formed by sharp silicon tips on solid surfaces with different degrees of complexity using friction force microscopy. The sample surfaces will be exposed to electrolyte aqueous solutions and to polar and nonpolar solvents with varying viscosities. The different interaction potentials will be quantitatively reconstructed from the time variations of the friction forces acting on the tip with original numerical techniques. The results so obtained will be compared to complementary information obtained with dynamic AFM modes.

Requirements:
- master degree in physics or materials science
- technical skills and interest in instrumental setups and/or computer modeling of natural phenomena
- knowledge of scanning probe microscopy and/or standard programming environments (C, Python, Matlab) is helpful but not mandatory
- excellent knowledge of the English language in speaking and writing

Are you interested? Please contact Prof. Dr. Enrico Gnecco (enrico.gnecco@uni-jena.de) before August 15, 2020.
Methoden:
Anfangsdatum: 1. Oktober 2020
Geschätzte Dauer: 3 years
Bezahlung:
Papers: https://www.nature.com/articles/s41598-018-22847-z

https://pubs.acs.org/doi/abs/10.1021/acsnano.5b07825

https://pubs.rsc.org/en/content/articlelanding/2014/NR/C4NR01522C
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