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Université de Fribourg

High‐ TC interfacial ferromagnetism in SrMnO 3 LaMnO 3 superlattices

Keunecke, Marius ; Lyzwa, Fryderyk ; Schwarzbach, Danny ; Roddatis, Vladimir ; Gauquelin, Nicolas ; Müller‐Caspary, Knut ; Verbeeck, Johann ; Callori, Sara J. ; Klose, Frank ; Jungbauer, Markus ; Moshnyaga, Vasily

In: Advanced Functional Materials, 2020, vol. 30, no. 18, p. 1808270

Heterostructures of strongly correlated oxides demonstrate various intriguing and potentially useful interfacial phenomena. LaMnO3/SrMnO3 superlattices are presented showcasing a new high‐temperature ferromagnetic phase with Curie temperature, T C ≈360 K, caused by electron transfer from the surface of the LaMnO3 donor layer into the neighboring SrMnO3 acceptor layer. As a result, the...

Université de Fribourg

Hierarchically porous reduced graphene oxide coated with metal–organic framework hkust-1 for enhanced hydrogen gas affinity

Song, Kyung Seob ; Kim, Daeok ; Coskun, Ali

In: ACS Applied Nano Materials, 2020, vol. 3, no. 2, p. 985–991

Metal–organic frameworks (MOFs) are crystalline porous materials that have been actively explored for various gas storage, separation, and conversion applications because of their structural tunability. While the micropores (<2 nm) in MOFs are essential for increased gas affinity, these small pores significantly decrease the mass-transport kinetics. One way to address this challenge is to ...

Université de Fribourg

Thermal energy transport across the interface between phase change material n-heneicosane in solid and liquid phases and few-layer graphene

Chilukoti, Hari Krishna ; Zhou, Tianhang ; Ardham, Vikram Reddy ; Böhm, Michael C. ; Müller-Plathe, Florian

In: The Journal of Physical Chemistry C, 2019, vol. 123, no. 48, p. 29192–29202

Molecular dynamics simulations have been performed to investigate the mechanism of thermal energy transport at the interface between n-heneicosane in solid and liquid phases and few-layer graphene at different temperatures under two heating modes (in the “heat-matrix” mode, heat is flowing from the heated heneicosane molecules to the cooled ones through the graphene layers and in the...

Université de Fribourg

Pressure, surface tension, and curvature in active systems: A touch of equilibrium

Wittmann, René ; Smallenburg, Frank ; Brader, Joseph M.

In: The Journal of Chemical Physics, 2019, vol. 150, no. 17, p. 174908

We explore the pressure of active particles on curved surfaces and its relation to other interfacial properties. We use both direct simulations of the active systems as well as simulations of an equilibrium system with effective (pair) interactions designed to capture the effects of activity. Comparing the active and effective passive systems in terms of their bulk pressure, we elaborate that...

Consortium of Swiss Academic Libraries

Interfacial Design for Joining Technologies: An Historical Perspective

Janczak-Rusch, J. ; Kaptay, G. ; Jeurgens, L.

In: Journal of Materials Engineering and Performance, 2014, vol. 23, no. 5, p. 1608-1613

Université de Fribourg

Templated assembly of pore-forming peptides in lipid membranes

Fennouri, Aziz ; List, Jonathan ; Dupasquier, Jessica ; Haeni, Laetitia ; Vanni, Stefano ; Rothen-Rutishauser, Barbara ; Mayer, Michael

In: CHIMIA International Journal for Chemistry, 2019, vol. 73, no. 1, p. 59–62

Pore-forming peptides are of interest due to their antimicrobial activity and ability to form gateways through lipid membranes. Chemical modification of these peptides makes it possible to arrange several peptide monomers into well-defined pore-forming structures using various templating strategies. These templated super-structures can exert antimicrobial activity at significantly lower total...