Up to this point the main interactions have been with the other ESR in Southampton, Aleš Rapuc and Paola Torche. We discussed how to link the theoretical model developed by Paola to Aleš' measurements with AFM using the predictive power of my DFT calculations.
I also discussed with Antonio Cammarata from the CTU in Prague about how to describe accurately the layered structures of TMDs within DFT framework and how to compute the phonon spectra from first principles.
Recently, I am speaking with Kapil Bhorkar from FORTH-ICE\HT in Greece who is trying to synthetize the Ti:MoS2 compound using CVD techniques.
We discussed the possibility for a secondment in Prague with Victor Claerbout and Paolo Nicolini during which I would learn how to use the LAMMPS software and carry out classical Molecular Dynamics simulations to study the frictional behaviour of graphene-MoS2 heterostructures.
At this stage, the main interaction with the ESRs has been with Aleš Rapuc and Andrea Silva, which are both at Southampton University. We have discussed future articles we can write together, combining experiments done by Aleš, DFT simulations from Andrea to find the correct potential of interaction (this last would be an important input in the modelling at the mesoscopic level that I do). We have also talked with Victor and Paolo from Prague about the possibility of a joint project while we do our secondments next year in January-March.
Secondment in Prague, June 2018: Stick-slip measurement on WS2 sample.
AFM training with dr. Kosta Simonovic (CVUT) and dr. Egor Ukraintsev (FZU) on NTEGRA AFM system. We have managed to set up a system to achieve a stick-slip measurement on WS2 sample, which can be correlated with Prandtl-Tomlinson nano-friction model.
Raman spectroscopy training with dr. Kosta Simonovic (CVUT) and measurements of Raman spectra on CVD deposited MoS2 and on amorphous sputtered Ti-MoS2 samples.
Up to now, the only interaction that I have with other parts of the project is to meet them during SOLUTION meetings to discuss about our work. Also, from them I got informed about conferences and trainings related to our project.
Collaboration with Dr. S. N. Yannopoulos and PhD Student Kapil Bhorkar, FORTH/ICE-HT, Greece.
Samples that we received: films (layers) of Molybdenum, Tungsten, MoS2, MoSe2, WS2 and WSe2.
Experiment: we performed a biocompatibility assay using different type of films to study the biofilm formation of Staphylococcus aureus in the surface of the layers.
Secondment: FORTH/ICE-HT, Greece, in 2019 to perform metabolomics experiments.
Planning some coating depositions in Prague.
As for collaboration with other institutions in the consortium I have sent samples to Czech Technical University in Prague for Raman Spectroscopy.
Technical Discussions about DFT study of MoS2 coumpound with Andrea Silva; Theory to experiments discussions with Aleš Rapuc; Plan for 1st Secondment in preparation.
At this stage of my training the main interactions have been within the advanced materials group in Prague to which also ESR Florian Belviso belongs. For now, I have future collaborations planned mainly with the ESRs in Southampton, Andrea Silva and Paola Torche. This collaboration will be two-fold in which both Andrea and Paola will first visit Prague during which I will make them familiar with the MD simulations I perform. We have already discussed several ideas for possible topics on which we can focus. Thereafter, I will visit Andrea and Paola and they will make me familiar with the techniques they use. For this we are still thinking about possible topics to study.
The first planned secondment is in the University of Southampton. Learning about tribology equipment such as test rigs, SEM, Raman, AFM is one of the objectives. The other one is to analyse the samples already tested doing a coating characterization by SEM and Raman Spectroscopy.
We are in collaboration with IPN and IREIS developing different coatings to be tested in our disc-on-disc rig.
The first secondment of the ESR was expected to be realized by the end of 2018 at FORTH. Nevertheless, due to the resignation of Mrs. Leleviҫ, the secondment has been postponed. During the ESR’s work in the frame of the project, a visit at FORTH was made. During this visit various trials have been made to deposit Mo via CVD technique on top of composites provided by Artia. Owing to instrumental malfunction the work in FORTH was slowed down. During that visit at FORTH the ESR gained acquaintance with several techniques and scientific instruments provided by Dr. Spyros Yiannopoulos and his colleagues. Sharing the already made samples with the partners at University of Southampton was decided during 18M Meeting in July 2018, in ordered to be examined by AFM.
Due to the very limited time Mr. Mathioudakis has been working for the project, he hasn’t yet had the chance to interact in any way with other parts of the project.