Published in Frontiers in Nanotechnology
The electronic structure of single-crystalline EuO (100) ultrathin films, together with their exchange splitting energy (ΔE EX) and ferromagnetic phase transition temperature (T C), was investigated by temperature- and thickness-dependent angle-resolved photoemission spectroscopy. Both ΔE EX and T C decreased monotonically with decreasing film thic...
Published in ACS Applied Materials & Interfaces
The formation of ultrathin films of Rh-based porous metal–organic polyhedra (Rh-MOPs) by the Langmuir–Blodgett method has been explored. Homogeneous and dense monolayer films were formed at the air–water interface either using two different coordinatively alkyl-functionalized Rh-MOPs (HRhMOP(diz)12 and HRhMOP(oiz)12) or by in situ incorporation of ...
In this work, we present a comprehensive study on real-time monitoring the growth of epitaxial CoxFe3−xO4 thin films grown on SrTiO3(001) substrates via reactive molecular beam epitaxy. The growth process was monitored during evaporation by means of time resolved operando hard X-ray photoelectron spectroscopy (HAXPES). We prepared ultrathin ferrite...
Ultrathin oral films are novel delivery systems that do not require water to swallow, show rapid systemic release, and allow a comfortable and precise dosage. These films represent an option for administering active metabolites from medicinal plants used against insomnia, such as Agastache mexicana. However, incorporating complex bioactive molecule...
Here, we present the (element-specific) magnetic properties and cation ordering for ultrathin Co-rich cobalt ferrite films. Two Co-rich CoxFe3−xO4 films with different stoichiometry (x=1.1 and x=1.4) have been formed by reactive solid phase epitaxy due to post-deposition annealing from epitaxial CoO/Fe3O4 bilayers deposited before on Nb-doped SrTiO...
status: published
Published in Nano letters
Inversion-symmetry breaking is a ubiquitous concept in condensed-matter science: It is a prerequisite for technologically relevant effects such as piezoelectricity, nonlinear optical properties, and spin-transport phenomena. It also determines abstract properties, like the electronic topology in quantum materials. Therefore, the creation of materia...
Published in Nanomaterials
New micro- and nanoscale devices require electrically isolating materials with specific thermal properties. One option to characterize these thermal properties is the atomic force microscopy (AFM)-based scanning thermal microscopy (SThM) technique. It enables qualitative mapping of local thermal conductivities of ultrathin films. To fully understan...
L’objectif de ce travail de thèse est d’étudier le rôle du cisaillement sur la rupture de films ultra-minces de polymères, en couplant une étude numérique à une étude expérimentale. Tout d’abord, une méthode numérique adaptée à la résolution de l'équation des films minces a été mise en place en prenant en compte les forces capillaires et de van der...
Published in Advanced materials (Deerfield Beach, Fla.)
Strain engineering provides the ability to control the ground states and associated phase transition in epitaxial films. However, the systematic study of the intrinsic character and strain dependency in transition-metal nitrides remains challenging due to the difficulty in fabricating stoichiometric and high-quality films. Here the observation of a...
