@article{52657, abstract = {{Lubricants play a central role in many technical applications, e.g. in bearings and gears as well as in machining processes. In such applications, lubricants are exposed to extreme conditions in the contact area. In lubrication gaps, the pressure can reach values up to 5 GPa. The thermophysical properties of lubricants, and in particular the viscosity, at such extreme conditions have an important influence on the friction and wear behavior of a tribosystem. Accordingly, reliable lubricant property models are a prerequisite for accurate tribological simulations, e.g. elastohydrodynamic lubrication (EHL) simulations. Presently, the vast majority of experimental thermophysical property data are only available up to 1 GPa. Thus, reliable and robust models with strong extrapolation capabilities to higher pressure are required. In this work, viscosity measurements of squalane in a temperature range be tween 20 °C and 100 °C and pressures up to 1 GPa were carried out. Based on that data, a physical model for the viscosity was developed. The model is built by combining a molecular-based equation of state with the so-called entropy scaling approach. Finally, we demonstrate how this fluid property model can be favorably integrated in an EHL simulation by an application programming interface (API). The novel hybrid modeling approach is promising for future applications.}}, author = {{Wingertszahn, Patrick and Schmitt, Sebastian and Thielen, Stefan and Oehler, Manuel and Magyar, Balázs and Koch, Oliver and Hasse, Hans and Stephan, Simon}}, issn = {{0724-3472}}, journal = {{Tribologie und Schmierungstechnik}}, keywords = {{Surfaces, Coatings and Films, Surfaces and Interfaces, Mechanical Engineering, Mechanics of Materials}}, number = {{4-5}}, pages = {{5--12}}, publisher = {{Narr Francke Attempto Verlag GmbH + Co. KG}}, title = {{{Measurement, Modelling, and Appli cation of Lubricant Properties at Extreme Pressures}}}, doi = {{10.24053/tus-2023-0017}}, volume = {{70}}, year = {{2023}}, } @article{46494, abstract = {{To improve the mechanical performance and to address current shortcomings of adhesive bonds such as bond degradation due to aging, a pulsed laser surface pretreatment of the metal surfaces of aluminum AW 6082-T6 joints with epoxy adhesive E320 is investigated. The surface treatment of the specimens resulted in increased single-lap shear (SLS) strengths before and after hydrothermal aging in 80°C hot water compared to nonpretreated reference specimens. In order to reveal the correlations of laser parameters, resulting surface morphologies and the SLS strength, differently laser pretreated surfaces were characterized at the micro- and nanoscale using optical and scanning electron microscopies. The surface enlargement was quantified with a digital image analysis of cross-sections prepared from the joint interfaces. An analysis of variances (ANOVA) of the SLS results indicated that the laser parameters power and pulse frequency were most critical for obtaining high SLS strengths. Pretreated joint surfaces with a high micro- and nano-surface enlargement and deep solidification structures provide high SLS strengths of up to 50 MPa and almost negligible aging losses of merely 4%. Undercut structures on the pretreated surfaces were found to be beneficial for the mechanical and aging properties when only limited micro- and nanostructuring was applied.}}, author = {{Freund, Jonathan and Löbbecke, Miriam and Delp, Alexander and Walther, Frank and Wu, Shuang and Tröster, Thomas and Haubrich, Jan}}, issn = {{0021-8464}}, journal = {{The Journal of Adhesion}}, keywords = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Mechanics of Materials, General Chemistry}}, pages = {{1--31}}, publisher = {{Informa UK Limited}}, title = {{{Relationship between laser-generated micro- and nanostructures and the long-term stability of bonded epoxy-aluminum joints}}}, doi = {{10.1080/00218464.2023.2223475}}, year = {{2023}}, } @article{46495, abstract = {{A parameter investigation for manufacturing a hybrid system through the prepreg pressing process was carried out within the scope of this work to achieve optimal adhesion properties. The hybrid specimen comprises an aluminium sheet of alloy EN AW 6082 in T6 condition and a thermoset Carbon Fibre Reinforced Plastics prepreg. The prepreg pressing process allows the curing reaction of epoxy resin and the joining process to occur simultaneously to avoid an additional bonding process step. The surface of the aluminium sheet was pretreated in advance using a pulsed Nd:YAG laser to enhance the bonding properties. In the first step, the shear edge tests investigated the adhesion properties achieved with different consolidation (temperature, time and pressure) and laser parameters. Then, 3-point bending tests were carried out to investigate the influence of the consolidation parameters on the mechanical properties of the Carbon Fibre Reinforced Plastics-laminate. In this way, the optimal parameter sets for manufacturing hybrid structures were determined.}}, author = {{Wu, Shuang and Delp, Alexander and Freund, Jonathan and Walther, Frank and Haubrich, Jan and Löbbecke, Miriam and Tröster, Thomas}}, issn = {{0021-8464}}, journal = {{The Journal of Adhesion}}, keywords = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Mechanics of Materials, General Chemistry}}, pages = {{1--29}}, publisher = {{Informa UK Limited}}, title = {{{Adhesion properties of the hybrid system made of laser-structured aluminium EN AW 6082 and CFRP by co-bonding-pressing process}}}, doi = {{10.1080/00218464.2023.2245758}}, year = {{2023}}, } @article{32432, author = {{Yang, Yu and Huang, Jingyuan and Dornbusch, Daniel and Grundmeier, Guido and Fahmy, Karim and Keller, Adrian and Cheung, David L.}}, issn = {{0743-7463}}, journal = {{Langmuir}}, keywords = {{Electrochemistry, Spectroscopy, Surfaces and Interfaces, Condensed Matter Physics, General Materials Science}}, pages = {{9257–9265}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Effect of Surface Hydrophobicity on the Adsorption of a Pilus-Derived Adhesin-like Peptide}}}, doi = {{10.1021/acs.langmuir.2c01016}}, volume = {{38}}, year = {{2022}}, } @article{36874, author = {{Su, Jiangling and González Orive, Alejandro and Grundmeier, Guido}}, issn = {{0169-4332}}, journal = {{Applied Surface Science}}, keywords = {{Surfaces, Coatings and Films, Condensed Matter Physics, Surfaces and Interfaces, General Physics and Astronomy, General Chemistry}}, publisher = {{Elsevier BV}}, title = {{{Nano-FTIR and chemical force analysis of electrografted aryldiazonium salts on ODT-microcontact printed Au-surfaces}}}, doi = {{10.1016/j.apsusc.2022.155355}}, volume = {{609}}, year = {{2022}}, } @article{36872, author = {{Bobzin, K. and Kalscheuer, C. and Grundmeier, Guido and de los Arcos, T. and Kollmann, S. and Carlet, M.}}, issn = {{0257-8972}}, journal = {{Surface and Coatings Technology}}, keywords = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Condensed Matter Physics, General Chemistry}}, publisher = {{Elsevier BV}}, title = {{{Oxidation stability of chromium aluminum oxynitride hard coatings}}}, doi = {{10.1016/j.surfcoat.2022.128927}}, volume = {{449}}, year = {{2022}}, } @article{34459, author = {{Schmelzle, Lars and Striewe, Marius and Mergheim, Julia and Meschut, Gerson and Possart, Gunnar and Teutenberg, Dominik and Hein, David and Steinmann, Paul}}, issn = {{0169-4243}}, journal = {{Journal of Adhesion Science and Technology}}, keywords = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Mechanics of Materials, General Chemistry}}, title = {{{Testing, modelling, and parameter identification for adhesively bonded joints under the influence of temperature}}}, doi = {{10.1080/01694243.2022.2125714}}, year = {{2022}}, } @article{35976, author = {{de los Arcos de Pedro, Maria Teresa and Weinberger, Christian and Zysk, Frederik and Raj Damerla, Varun and Kollmann, Sabrina and Vieth, Pascal and Tiemann, Michael and Kühne, Thomas D. and Grundmeier, Guido}}, issn = {{0169-4332}}, journal = {{Applied Surface Science}}, keywords = {{Surfaces, Coatings and Films, Condensed Matter Physics, Surfaces and Interfaces, General Physics and Astronomy, General Chemistry}}, publisher = {{Elsevier BV}}, title = {{{Challenges in the interpretation of gas core levels for the determination of gas-solid interactions within dielectric porous films by ambient pressure XPS}}}, doi = {{10.1016/j.apsusc.2022.154525}}, volume = {{604}}, year = {{2022}}, } @article{40984, abstract = {{A two-step seeded-growth method was refined to synthesize Au@Pd core@shell nanoparticles with thin Pd shells, which were then deposited onto alumina to obtain a supported Au@Pd/Al2O3 catalyst active for prototypical CO oxidation. By the strict control of temperature and Pd/Au molar ratio and the use of l-ascorbic acid for making both Au cores and Pd shells, a 1.5 nm Pd layer is formed around the Au core, as evidenced by transmission electron microscopy and energy-dispersive spectroscopy. The core@shell structure and the Pd shell remain intact upon deposition onto alumina and after being used for CO oxidation, as revealed by additional X-ray diffraction and X-ray photoemission spectroscopy before and after the reaction. The Pd shell surface was characterized with in situ infrared (IR) spectroscopy using CO as a chemical probe during CO adsorption–desorption. The IR bands for CO ad-species on the Pd shell suggest that the shell exposes mostly low-index surfaces, likely Pd(111) as the majority facet. Generally, the IR bands are blue-shifted as compared to conventional Pd/alumina catalysts, which may be due to the different support materials for Pd, Au versus Al2O3, and/or less strain of the Pd shell. Frequencies obtained from density functional calculations suggest the latter to be significant. Further, the catalytic CO oxidation ignition-extinction processes were followed by in situ IR, which shows the common CO poisoning and kinetic behavior associated with competitive adsorption of CO and O2 that is typically observed for noble metal catalysts.}}, author = {{Feng, Yanyue and Schaefer, Andreas and Hellman, Anders and Di, Mengqiao and Härelind, Hanna and Bauer, Matthias and Carlsson, Per-Anders}}, issn = {{0743-7463}}, journal = {{Langmuir}}, keywords = {{Electrochemistry, Spectroscopy, Surfaces and Interfaces, Condensed Matter Physics, General Materials Science}}, number = {{42}}, pages = {{12859--12870}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Synthesis and Characterization of Catalytically Active Au Core─Pd Shell Nanoparticles Supported on Alumina}}}, doi = {{10.1021/acs.langmuir.2c01834}}, volume = {{38}}, year = {{2022}}, } @article{33691, abstract = {{Near ambient pressure XPS in nitrogen atmosphere was utilized to investigate gas-solid interactions within porous SiO2 films ranging from 30 to 75 nm thickness. The films were differentiated in terms of porosity and roughness. The XPS N1s core levels of the N2 gas in presence of the SiO2 samples showed variations in width, binding energy and line shape. The width correlated with the surface charge induced in the dielectric films upon X-ray irradiation. The observed different binding energies observed for the N1s peak can only partly be associated with intrinsic work function differences between the samples, opening the possibility that the effect of physisorption at room temperature could be detected by a shift in the measured binding energy. However, the signals also show an increasing asymmetry with rising surface charge. This might be associated with the formation of vertical electrical gradients within the dielectric porous thin films, which complicates the assignment of binding energy positions to specific surface-related effects. With the support of Monte Carlo and first principles density functional theory calculations, the observed shifts were discussed in terms of the possible formation of transitory dipoles upon N2 physisorption within the porous SiO2 films.}}, author = {{de los Arcos, Teresa and Weinberger, Christian and Zysk, Frederik and Raj Damerla, Varun and Kollmann, Sabrina and Vieth, Pascal and Tiemann, Michael and Kühne, Thomas and Grundmeier, Guido}}, issn = {{0169-4332}}, journal = {{Applied Surface Science}}, keywords = {{Surfaces, Coatings and Films, Condensed Matter Physics, Surfaces and Interfaces, General Physics and Astronomy, General Chemistry}}, publisher = {{Elsevier BV}}, title = {{{Challenges in the interpretation of gas core levels for the determination of gas-solid interactions within dielectric porous films by ambient pressure XPS}}}, doi = {{10.1016/j.apsusc.2022.154525}}, volume = {{604}}, year = {{2022}}, } @article{34652, author = {{Vieth, P. and Garthe, M.-A. and Voswinkel, Dietrich and Schaper, Mirko and Grundmeier, Guido}}, issn = {{0257-8972}}, journal = {{Surface and Coatings Technology}}, keywords = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Condensed Matter Physics, General Chemistry}}, publisher = {{Elsevier BV}}, title = {{{Enhancement of the delamination resistance of adhesive film coated surface laser melted aluminum 7075-T6 alloy by aminophosphonic acid adsorption}}}, doi = {{10.1016/j.surfcoat.2022.128835}}, volume = {{447}}, year = {{2022}}, } @article{46479, author = {{Bobzin, K. and Kalscheuer, C. and Grundmeier, Guido and Kollmann, S. and Carlet, M. and de los Arcos de Pedro, Maria Teresa}}, issn = {{0257-8972}}, journal = {{Surface and Coatings Technology}}, keywords = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Condensed Matter Physics, General Chemistry}}, publisher = {{Elsevier BV}}, title = {{{Oxidation stability of chromium aluminum oxynitride hard coatings}}}, doi = {{10.1016/j.surfcoat.2022.128927}}, volume = {{449}}, year = {{2022}}, } @article{41516, author = {{Tillmann, Wolfgang and Lopes Dias, Nelson Filipe and Franke, Carlo and Kokalj, David and Stangier, Dominic and Filor, Viviane and Mateus-Vargas, Rafael Hernán and Oltmanns, Hilke and Kietzmann, Manfred and Meißner, Jessica and Hein, Maxwell and Pramanik, Sudipta and Hoyer, Kay-Peter and Schaper, Mirko and Nienhaus, Alexander and Thomann, Carl Arne and Debus, Jörg}}, issn = {{0257-8972}}, journal = {{Surface and Coatings Technology}}, keywords = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Condensed Matter Physics, General Chemistry}}, publisher = {{Elsevier BV}}, title = {{{Tribo-mechanical properties and biocompatibility of Ag-containing amorphous carbon films deposited onto Ti6Al4V}}}, doi = {{10.1016/j.surfcoat.2021.127384}}, volume = {{421}}, year = {{2021}}, } @article{33646, author = {{Majumdar, I. and Sahoo, S.K. and Parvan, V. and Mirhosseini, Hossein and Chacko, B. and Wang, Y. and Greiner, D. and Kühne, Thomas and Schlatmann, R. and Lauermann, I.}}, issn = {{0169-4332}}, journal = {{Applied Surface Science}}, keywords = {{Surfaces, Coatings and Films, Condensed Matter Physics, Surfaces and Interfaces, General Physics and Astronomy, General Chemistry}}, publisher = {{Elsevier BV}}, title = {{{Effects of KF and RbF treatments on Cu(In,Ga)Se2-based solar cells: A combined photoelectron spectroscopy and DFT study}}}, doi = {{10.1016/j.apsusc.2020.148085}}, volume = {{538}}, year = {{2020}}, } @article{41521, author = {{Tillmann, Wolfgang and Lopes Dias, Nelson Filipe and Stangier, Dominic and Hagen, Leif and Schaper, Mirko and Hengsbach, Florian and Hoyer, Kay-Peter}}, issn = {{0257-8972}}, journal = {{Surface and Coatings Technology}}, keywords = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Condensed Matter Physics, General Chemistry}}, publisher = {{Elsevier BV}}, title = {{{Tribo-mechanical properties and adhesion behavior of DLC coatings sputtered onto 36NiCrMo16 produced by selective laser melting}}}, doi = {{10.1016/j.surfcoat.2020.125748}}, volume = {{394}}, year = {{2020}}, } @article{41822, author = {{Carl, Nico and Müller, Wenke and Schweins, Ralf and Huber, Klaus}}, issn = {{0743-7463}}, journal = {{Langmuir}}, keywords = {{Electrochemistry, Spectroscopy, Surfaces and Interfaces, Condensed Matter Physics, General Materials Science}}, number = {{1}}, pages = {{223--231}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Controlling Self-Assembly with Light and Temperature}}}, doi = {{10.1021/acs.langmuir.9b03040}}, volume = {{36}}, year = {{2019}}, } @article{41828, author = {{Hämisch, Benjamin and Büngeler, Anne and Kielar, Charlotte and Keller, Adrian and Strube, Oliver and Huber, Klaus}}, issn = {{0743-7463}}, journal = {{Langmuir}}, keywords = {{Electrochemistry, Spectroscopy, Surfaces and Interfaces, Condensed Matter Physics, General Materials Science}}, number = {{37}}, pages = {{12113--12122}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Self-Assembly of Fibrinogen in Aqueous, Thrombin-Free Solutions of Variable Ionic Strengths}}}, doi = {{10.1021/acs.langmuir.9b01515}}, volume = {{35}}, year = {{2019}}, } @article{41830, author = {{Stolzenburg, Pierre and Hämisch, Benjamin and Richter, Sebastian and Huber, Klaus and Garnweitner, Georg}}, issn = {{0743-7463}}, journal = {{Langmuir}}, keywords = {{Electrochemistry, Spectroscopy, Surfaces and Interfaces, Condensed Matter Physics, General Materials Science}}, number = {{43}}, pages = {{12834--12844}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Secondary Particle Formation during the Nonaqueous Synthesis of Metal Oxide Nanocrystals}}}, doi = {{10.1021/acs.langmuir.8b00020}}, volume = {{34}}, year = {{2018}}, } @article{41836, author = {{Kley, M. and Kempter, A. and Boyko, V. and Huber, Klaus}}, issn = {{0743-7463}}, journal = {{Langmuir}}, keywords = {{Electrochemistry, Spectroscopy, Surfaces and Interfaces, Condensed Matter Physics, General Materials Science}}, number = {{24}}, pages = {{6071--6083}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Silica Polymerization from Supersaturated Dilute Aqueous Solutions in the Presence of Alkaline Earth Salts}}}, doi = {{10.1021/acs.langmuir.7b00887}}, volume = {{33}}, year = {{2017}}, } @article{41835, author = {{Büngeler, Anne and Hämisch, Benjamin and Huber, Klaus and Bremser, Wolfgang and Strube, Oliver I.}}, issn = {{0743-7463}}, journal = {{Langmuir}}, keywords = {{Electrochemistry, Spectroscopy, Surfaces and Interfaces, Condensed Matter Physics, General Materials Science}}, number = {{27}}, pages = {{6895--6901}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Insight into the Final Step of the Supramolecular Buildup of Eumelanin}}}, doi = {{10.1021/acs.langmuir.7b01634}}, volume = {{33}}, year = {{2017}}, }