@article{22851, author = {{Hunold, Oliver and Wiesing, Martin and de los Arcos, Teresa and Music, Denis and Grundmeier, Guido and Schneider, Jochen M.}}, issn = {{0169-4332}}, journal = {{Applied Surface Science}}, pages = {{1165--1172}}, title = {{{Influence of O2 exposure on the interaction between CH4 and amorphous AlYB14}}}, doi = {{10.1016/j.apsusc.2016.09.092}}, year = {{2016}}, } @article{22852, author = {{Torun, Boray and Giner, Ignacio and Grundmeier, Guido and Ozcan, Ozlem}}, issn = {{0142-2421}}, journal = {{Surface and Interface Analysis}}, pages = {{71--74}}, title = {{{In situPM-IRRAS studies of organothiols and organosilane monolayers-ZnO interfaces at high water activities}}}, doi = {{10.1002/sia.6058}}, year = {{2016}}, } @article{22853, author = {{Yasakau, K.A. and Giner, I. and Vree, C. and Ozcan, O. and Grothe, R. and Oliveira, A. and Grundmeier, Guido and Ferreira, M.G.S. and Zheludkevich, M.L.}}, issn = {{0169-4332}}, journal = {{Applied Surface Science}}, pages = {{144--156}}, title = {{{Influence of stripping and cooling atmospheres on surface properties and corrosion of zinc galvanizing coatings}}}, doi = {{10.1016/j.apsusc.2016.07.093}}, year = {{2016}}, } @article{22854, author = {{Hordych, Illia and Rodman, Dmytro and Nürnberger, Florian and Hoppe, Christian and Schmidt, Hans Christian and Grundmeier, Guido and Homberg, Werner and Maier, Hans Jürgen}}, issn = {{1611-3683}}, journal = {{steel research international}}, pages = {{1619--1626}}, title = {{{Effect of Pre-Rolling Heat Treatments on the Bond Strength of Cladded Galvanized Steels in a Cold Roll Bonding Process}}}, doi = {{10.1002/srin.201600021}}, year = {{2016}}, } @article{22855, author = {{Weiss, J. and Voigt, M. and Kunze, C. and Sánchez, J.E. Huacuja and Possart, W. and Grundmeier, Guido}}, issn = {{0143-7496}}, journal = {{International Journal of Adhesion and Adhesives}}, pages = {{167--175}}, title = {{{Ageing mechanisms of polyurethane adhesive/steel interfaces}}}, doi = {{10.1016/j.ijadhadh.2016.06.009}}, year = {{2016}}, } @article{22856, author = {{Pohl, K. and Ozcan, O. and Voigt, M. and Grundmeier, Guido}}, issn = {{0947-5117}}, journal = {{Materials and Corrosion}}, pages = {{1020--1026}}, title = {{{Adhesion and corrosive delamination of epoxy films on chemically etched ZnMgAl-alloy coatings}}}, doi = {{10.1002/maco.201608968}}, year = {{2016}}, } @inproceedings{22858, author = {{Schmidt, Hans Christian and Homberg, Werner and Hoppe, Christian and Grundmeier, Guido and Hordych, Illia and Maier, Hans Jürgen}}, title = {{{Cold pressure welding by incremental rolling: Deformation zone analysis}}}, doi = {{10.1063/1.4963507}}, year = {{2016}}, } @article{22680, author = {{Giner, Ignacio and Keller, Adrian and Grundmeier, Guido}}, issn = {{0010-938X}}, journal = {{Corrosion Science}}, pages = {{496--503}}, title = {{{Fundamental understanding of the corrosion and biomineralization of MgO surfaces – An in situ AFM study}}}, doi = {{10.1016/j.corsci.2015.08.024}}, volume = {{100}}, year = {{2015}}, } @article{22857, author = {{Bandorf, R. and Waschke, S. and Carreri, F.C. and Vergöhl, M. and Grundmeier, Guido and Bräuer, G.}}, issn = {{0257-8972}}, journal = {{Surface and Coatings Technology}}, pages = {{77--81}}, title = {{{Direct metallization of PMMA with aluminum films using HIPIMS}}}, doi = {{10.1016/j.surfcoat.2015.10.070}}, year = {{2015}}, } @article{41534, author = {{Niendorf, Thomas and Brenne, Florian and Hoyer, Kay-Peter and Schwarze, Dieter and Schaper, Mirko and Grothe, Richard and Wiesener, Markus and Grundmeier, Guido and Maier, Hans Jürgen}}, issn = {{1073-5623}}, journal = {{Metallurgical and Materials Transactions A}}, keywords = {{Metals and Alloys, Mechanics of Materials, Condensed Matter Physics}}, number = {{7}}, pages = {{2829--2833}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Processing of New Materials by Additive Manufacturing: Iron-Based Alloys Containing Silver for Biomedical Applications}}}, doi = {{10.1007/s11661-015-2932-2}}, volume = {{46}}, year = {{2015}}, } @article{24112, author = {{Niendorf, Thomas and Brenne, Florian and Hoyer, Kay-Peter and Schwarze, Dieter and Schaper, Mirko and Grothe, Richard and Wiesener, Markus and Grundmeier, Guido and Maier, Hans Jürgen}}, issn = {{1073-5623}}, journal = {{Metallurgical and Materials Transactions A}}, pages = {{2829--2833}}, title = {{{Processing of New Materials by Additive Manufacturing: Iron-Based Alloys Containing Silver for Biomedical Applications}}}, doi = {{10.1007/s11661-015-2932-2}}, year = {{2015}}, } @article{20944, abstract = {{Joining metals using electrochemical support (ECUF) is a new process for cold pressure welding sheets and parts. This new process is based on an electrochemical in-line surface treatment followed by incremental pilger rolling. The ECUF process intends to cold pressure weld materials under optimized conditions. Oxide layers on metal surfaces are known to inhibit the formation of cold pressure welds. The in-line electrochemical treatment will be used to remove these surface oxides for specific engineering metals and alloys. Hence, an improved pressure weld formation at lower forces and smaller reduction ratios is expected for the electrochemically treated surfaces. Using a more flexible pressure welding process, the number of applications could be greatly improved. First tests with copper were performed to analyse the efficiency of the proposed electrochemical surface treatments. Two electrochemical treatments, the cathodic oxide-reduction and cyclovoltammetric oxide-reduction, were compared with conventional treatments (degreasing and scratch brushing) regarding their influence on the cold pressure welding process of copper. The weld strength of lap welds has been investigated as well as the necessary reduction threshold to form a weld. It was found that the electrochemical oxide reduction resulted in higher weld strength. The results of scanning electron microscopy (SEM) and energy dispersive analysis of X-rays (EDX) indicate that surface oxides were successfully removed by the electrochemical surface treatments. (C) 2014 Elsevier B.V. All rights reserved.}}, author = {{Ebbert, Christoph and Schmidt, H. C. and Rodman, D. and Nuernberger, F. and Homberg, W. and Maier, H. J. and Grundmeier, Guido}}, issn = {{0924-0136}}, journal = {{JOURNAL OF MATERIALS PROCESSING TECHNOLOGY}}, number = {{10}}, pages = {{2179--2187}}, title = {{{Joining with electrochemical support (ECUF): Cold pressure welding of copper}}}, doi = {{10.1016/j.jmatprotec.2014.04.015}}, volume = {{214}}, year = {{2014}}, } @article{20924, author = {{Ebbert, Christoph and Alissawi, N. and Somsen, C. and Eggeler, G. and Strunskus, T. and Faupel, F. and Grundmeier, Guido}}, issn = {{0040-6090}}, journal = {{Thin Solid Films}}, pages = {{161--167}}, title = {{{Spectroelectrochemical and morphological studies of the ageing of silver nanoparticles embedded in ultra-thin perfluorinated sputter deposited films}}}, doi = {{10.1016/j.tsf.2014.10.054}}, year = {{2014}}, } @article{20945, abstract = {{Calcium-Silicate-Hydrates (C-S-H) are the main binding phases in most concrete which is the primarily used composite construction material in the world. However, a big lack is cleaving between the actual knowledge about C-S-H, compared to what could be reached using state-of-the-art technologies of modern research. In this article, the formation of a C-S-H phase on a native oxide covered silicon wafer is investigated by means of in-situ attenuated total reflection infrared (ATR-IR) and ex-situ surface-enhanced Raman spectroscopy (SERS). The total thickness of the C-S-H phase is determined by X-ray photoelectron spectroscopy (XPS) to be 3 nm. The formation appears to be reversible depending on the environment pH value and can be performed at room temperature. Based on density functional theory (DFT) calculations, it is shown that the C-S-H phase in the presence of water will change its chemical composition in order to reach the thermodynamic ground state of the system. This change is achieved by a metal-proton exchange reaction. The stoichiometry of these metal-proton exchange reactions is nearly independent of the environment pH value. Electrokinetic measurements yield isoelectric points of 2.0 and 2.6 for the native oxide covered silicon wafer (SiO2) and the C-S-H phase. This is consistent with a predominance of Si-O sites at the C-S-H/water interface. (C) 2013 Elsevier B. V. All rights reserved.}}, author = {{Ebbert, Christoph and Grundmeier, Guido and Buitkamp, Nadine and Kroeger, Alexander and Messerschmidt, Florian and Thissen, Peter}}, issn = {{1873-5584}}, journal = {{APPLIED SURFACE SCIENCE}}, pages = {{207--214}}, title = {{{Toward a microscopic understanding of the calcium-silicate-hydrates/water interface}}}, doi = {{10.1016/j.apsusc.2013.11.045}}, volume = {{290}}, year = {{2014}}, } @article{20946, abstract = {{In the current work, we study the silver ion release potential and the water uptake through a SiOxCyHz-polymer which is grown from the precursor hexamethyldisiloxane (HMDSO) in radiofrequency (RF) plasma. These layers were deposited on top of two dimensional (2D) ensembles of silver nanoparticles (AgNPs) with nominal thickness of 2 nm on a 20 nm RF-sputtered polytetrafluoroethylene (PTFE) thin film. The composition of the plasma-polymerized HMDSO barriers was varied by changing the oxygen flow during the polymerization process and their thickness was varied as well. Morphology and optical properties of the nanocomposites were investigated using transmission electron microscopy (TEM) and UV-Visible spectroscopy (UV-Vis), respectively. The concentration of the silver ions released from the nanocomposites after immersion in water for several time intervals was measured using inductively coupled plasma mass spectrometry (ICP-MS). Contact angle analysis and electrochemical impedance spectroscopy (EIS) measurements were also performed and results show a strong dependence of the coatings properties and their water uptake on the oxygen content in the coating films and their thickness. Plasma polymerization with increasing the oxygen flow leads to the formation of more hydrophilic thin films with a higher Ag ion release potential. Increasing the thickness of the coatings reduced the amount of the released ions and the rate of the release process was slowed down. This indicates that by tailoring the structure and the thickness of the plasma-polymerized coating films, one can tune the silver ion release properties of Ag/polymer nanocomposites.}}, author = {{Alissawi, N. and Peter, T. and Strunskus, T. and Ebbert, Christoph and Grundmeier, Guido and Faupel, F.}}, issn = {{1572-896X}}, journal = {{JOURNAL OF NANOPARTICLE RESEARCH}}, number = {{11}}, title = {{{Plasma-polymerized HMDSO coatings to adjust the silver ion release properties of Ag/polymer nanocomposites}}}, doi = {{10.1007/s11051-013-2080-9}}, volume = {{15}}, year = {{2013}}, } @article{13548, author = {{Thissen, Peter and Thissen, Vera and Wippermann, Stefan and Chabal, Yves J. and Grundmeier, Guido and Schmidt, Wolf Gero}}, issn = {{0039-6028}}, journal = {{Surface Science}}, pages = {{902--907}}, title = {{{pH-dependent structure and energetics of H2O/MgO(100)}}}, doi = {{10.1016/j.susc.2012.01.018}}, volume = {{606}}, year = {{2012}}, } @article{20947, abstract = {{Alkylphosphonic acids of different alkyl chain lengths were adsorbed on electrochemically polished NiTi surfaces from ethanolic solutions. The electropolishing process led to passive films mainly composed of Ti-oxyhydroxide. The surface showed nanoscopic etching pits with a depths of about 2 nm and a diameter of about 20 nm. The interfacial binding mechanism of the phosphonic acid group to the oxyhydroxide surface and the ordering of the monolayer were spectroscopically analysed by means of infrared reflection absorption FTIR-spectroscopy with (PM-IRRAS) and without (IRRAS) photoelastic modulation. The comparison of IRRAS and PM-IRRAS data of the long chain octadecylphosphonic acid monolayer proved that the binding mechanism of the phosphonic acid group to the oxyhydroxide surface is based on a mono-or bidentate bond, which is not stable in the presence of high water activities. An alkyl chain length of 17 CH2 groups is required for the formation of self-assembled monolayers, which are stable in aqueous environments. These long chain aliphatic organophosphonic acid monolayers were shown to inhibit anodic and cathodic surface reactions. (C) 2010 Elsevier B.V. All rights reserved.}}, author = {{Maxisch, M. and Ebbert, Christoph and Torun, B. and Fink, N. and de los Arcos, T. and Lackmann, J. and Maier, H. J. and Grundmeier, Guido}}, issn = {{1873-5584}}, journal = {{APPLIED SURFACE SCIENCE}}, number = {{6}}, pages = {{2011--2018}}, title = {{{PM-IRRAS studies of the adsorption and stability of organophosphonate monolayers on passivated NiTi surfaces}}}, doi = {{10.1016/j.apsusc.2010.09.044}}, volume = {{257}}, year = {{2011}}, } @article{13843, author = {{Wippermann, S. and Schmidt, Wolf Gero and Thissen, P. and Grundmeier, Guido}}, issn = {{1862-6351}}, journal = {{physica status solidi (c)}}, number = {{2}}, pages = {{137--140}}, title = {{{Dissociative and molecular adsorption of water onα-Al2O3(0001)}}}, doi = {{10.1002/pssc.200982423}}, volume = {{7}}, year = {{2010}}, } @article{13580, author = {{Wippermann, S. and Schmidt, Wolf Gero and Thissen, P. and Grundmeier, Guido}}, issn = {{1862-6351}}, journal = {{physica status solidi (c)}}, number = {{2}}, pages = {{137--140}}, title = {{{Dissociative and molecular adsorption of water onα-Al2O3(0001)}}}, doi = {{10.1002/pssc.200982423}}, volume = {{7}}, year = {{2009}}, } @article{13664, author = {{Lange, B. and Posner, R. and Pohl, K. and Thierfelder, C. and Grundmeier, Guido and Blankenburg, S. and Schmidt, Wolf Gero}}, issn = {{0039-6028}}, journal = {{Surface Science}}, pages = {{60--64}}, title = {{{Water adsorption on hydrogenated Si(111) surfaces}}}, doi = {{10.1016/j.susc.2008.10.030}}, volume = {{603}}, year = {{2009}}, }