Defects & Transformations of Materials

Experimental studies of atomic defects and processes in materials by means of specific and sensitive techniques of positron-electron annihilation and dilatometry.

return

Publications:

2021
Markus Gößler, Stefan Topolovec, Heinz Krenn and Roland Würschum Nanoporous Pd 1−x Co x for hydrogen-intercalation magneto-ionics APL Materials 9, 2021 , DOI Show publication in PURE
2020
Markus Gößler, Manfred Nachtnebel, Hartmuth Schröttner, Heinz Krenn, Eva-Maria Steyskal and Roland Würschum Evolution of superparamagnetism in the electrochemical dealloying process Journal of Applied Physics 128, 2020 , DOI Show publication in PURE
2019
Gregor Klinser, Harald Krenn, Stefan Koller and Roland Würschum Operando monitoring of charging-induced defect formation in battery electrodes by positrons Applied Physics Letters 114, 013905, 2019 , DOI Show publication in PURE
Kashif Nadeem, M. Kamran, Heinz Krenn, D.V. Szabo, Ulrich Brossmann and Roland Würschum Disordered and Frustrated Magnetization in Coated MnFe2O4 Nanoparticles Prepared by Microwave Plasma Synthesis Solid State Phenomena 289, 127-133, 2019 Show publication in PURE
Gregor Klinser, Roman Zettl, H. Martin R. Wilkening, Heinz Krenn, Ilie Hanzu and Roland Würschum Redox processes in sodium vanadium phosphate cathodes – insights from operando magnetometry Physical Chemistry, Chemical Physics , 2019 , DOI Show publication in PURE
Markus Gößler, Mihaela Albu, Gregor Klinser, Eva-Maria Steyskal, Heinz Krenn and Roland Würschum Magneto-Ionic Switching of Superparamagnetism Small , 2019 , DOI Show publication in PURE
Elisabeth Hengge, Eva-Maria Steyskal, Rupert Bachler, Alexander Dennig, Bernd Nidetzky and Roland Würschum Adsorption and desorption of self-assembled L-cysteine monolayers on nanoporous gold monitored by in situ resistometry Beilstein Journal of Nanotechnology 10, 2275-2279, 2019 , DOI Show publication in PURE
2018
Gregor Klinser, Martin Stückler, Harald Krenn, Stefan Koller, Walter Goessler, Heinz Krenn and Roland Würschum Charging processes in the cathode LiNi0.6Mn0.2Co0.2O2 as revealed by operando magnetometry Journal of Power Sources 396, 791-795, 2018 , DOI Show publication in PURE
Eva-Maria Steyskal, Michael Seidl, Sanja Simic and Roland Würschum Enhanced Charging-Induced Resistance Variations of Nanoporous Gold by Dealloying in Neutral Silver Nitrate Solution Langmuir 34, 13110-13115, 2018 , DOI Show publication in PURE
Markus Gößler, Eva-Maria Steyskal, Markus Stütz, Norbert Enzinger and Roland Würschum Hydrogen-induced plasticity in nanoporous palladium Beilstein Journal of Nanotechnology 9, 3013, 2018 , DOI Show publication in PURE
2017
Roland Würschum, Stefan Topolovec, Gregor Klinser, Wolfgang Sprengel, Harald Kren, Stefan Koller, H Krenn, Christoph Hugenschmidt, M. Reiner, Thomas Gigl, Frank Berkermeier and Martin Fiedler Defects and Charging Processes in Li-Ion Battery Cathodes Studied by Operando Magnetometry and Positron Anihilation Materials Science Forum 879, 2125-2130, 2017 , DOI Show publication in PURE
Eva-Maria Steyskal, Michael Seidl, Matthias Graf and Roland Würschum Dealloying progress during nanoporous structure evolution analyzed by in situ resistometry Physical Chemistry, Chemical Physics 19, 29880-29885, 2017 , DOI Show publication in PURE
2016
Stefan Topolovec, Harald Kren, Gregor Klinser, Stefan Koller, Heinz Krenn and Roland Würschum Operando magnetometry on LixCoO2 during charging/discharging Journal of Solid State Electrochemistry 20, 1491-1496, 2016 , DOI Show publication in PURE
Stefan Topolovec, Heinz Krenn and Roland Würschum Enhanced magnetic moment of ultrathin Co films measured by in situ electrodeposition in a SQUID Journal of Magnetism and Magnetic Materials 397, 96-100, 2016 , DOI Show publication in PURE
Gregor Klinser, Stefan Topolovec, Harald Kren, Stefan Koller, Heinz Krenn and Roland Würschum Charging of lithium cobalt oxide battery cathodes studied by means of magnetometry Solid State Ionics 293, 64-71, 2016 , DOI Show publication in PURE
Eva-Maria Steyskal, Zhen Qi, Peter Pölt, Mihaela Albu, Jörg Weissmüller and Roland Würschum Electrochemically Tunable Resistance of Nanoporous Platinum Produced by Dealloying Langmuir 32, 7757−7764, 2016 , DOI Show publication in PURE
Eva-Maria Steyskal, Christopher Alois Wiednig, Norbert Enzinger and Roland Würschum In situ characterization of hydrogen absorption in nanoporous palladium produced by dealloying Beilstein Journal of Nanotechnology 7, 1197-1201, 2016 , DOI Show publication in PURE
Gregor Klinser, Stefan Topolovec, Harald Kren, Stefan Koller, Walter Gössler, Roland Würschum and Heinz Krenn Continuous monitoring of the bulk oxidation states in LixNi1/3Mn1/3Co1/3O2 during charging and discharging Applied Physics Letters 109, 213901, 2016 , DOI Show publication in PURE
Ulrich Brossmann, Mihaela Albu, Ferdinand Hofer and Roland Würschum Single grain analysis on a nanoscale in ZrO2:Al2O3 nano-composites by means of high-resolution scanning transmission electron microscopy Materials Research Express 3, 2016 , DOI Show publication in PURE
2015
Stefan Topolovec, Heinz Krenn and Roland Würschum Electrochemical cell for in situ electrodeposition of magnetic thin films in a superconducting quantum interference device magnetometer Review of Scientific Instruments 86, 063903-063903, 2015 , DOI Show publication in PURE
2013
Eva-Maria Steyskal, Stefan Topolovec, Stephan Landgraf, Heinz Krenn and Roland Würschum In situ monitoring magnetism and resistance of nanophase platinum upon electrochemical oxidation Beilstein Journal of Nanotechnology 4, 394-399, 2013 , DOI Show publication in PURE
2012
Peter Parz, M.J. Faller, R. Pippan, Werner Puff and Roland Würschum Defects in Al-3wt%Cu after high-pressure torsion studied by two-dimensional Doppler broadening spectroscopy Physics Procedia 35, 10-15, 2012 , DOI Show publication in PURE
Kashif Nadeem, Heinz Krenn, Thomas Traußnig, Roland Würschum, D.V. Szabo and Ilse Letofsky-Papst Spin-glass freezing of maghemite nanoparticles prepared by microwave plasma synthesis Journal of Applied Physics 111, 113911-113917, 2012 , DOI Show publication in PURE
J.X. Fang, U. Vainio, Werner Puff, Roland Würschum, X.L. Wang, D. Wang, M. Ghafari, F. Jiang, J. Sun, H. Hahn and H. Gleiter Atomic Structure and Stuctural Stability of Sc_75Fe_25 Nanoglasses Nano Letters 12, 458-463, 2012 , DOI Show publication in PURE
Roland Würschum, Bernd Oberdorfer, Eva-Maria Steyskal, Wolfgang Sprengel, Werner Puff, P. Pikart, C. Hugenschmidt and R. Pippan Free volumes in bulk nanocrystalline metals studied by the complementary techniques of positron annihilation and dilatometry Physica / B 407, 2670-2675, 2012 , DOI Show publication in PURE
Wolfgang Sprengel, Bernd Oberdorfer, Eva-Maria Steyskal and Roland Würschum Dilatometry: a powerful tool for the study of defects in ultrafine grained metals Journal of Materials Science 47, 7921-7925, 2012 , DOI Show publication in PURE
2011
Thomas Traußnig, Stefan Topolovec, Kashif Nadeem, D.V. Szabo, Heinz Krenn and Roland Würschum Magnetization of Fe-oxide based nanocomposite tuned by surface charging Physica Status Solidi / Rapid Research Letters 5, 150-152, 2011 , DOI Show publication in PURE
Kashif Nadeem, Heinz Krenn, Thomas Traußnig, Roland Würschum, D.V. Szabo and Ilse Letofsky-Papst Effect of dipolar and exchange interactions on magnetic blocking of maghemite nanoparticles Journal of Magnetism and Magnetic Materials 323, 1998-2004, 2011 , DOI Show publication in PURE
Andreas Kautsch, Ulrich Brossmann, Heinz Krenn, Ferdinand Hofer, D.V. Szabo and Roland Würschum Structural and optical properties of nanoparticulate Y2O3:Eu2O3 made by microwave plasma synthesis Applied Physics / A 105, 709-712, 2011 , DOI Show publication in PURE
Bernd Oberdorfer, Eva-Maria Steyskal, Wolfgang Sprengel, Reinhard Pippan, Michael Zehetbauer, Werner Puff and Roland Würschum Recrystallization kinetics of ultrafine-grained Ni studied by dilatometry Journal of Alloys and Compounds 509, 5309-5311, 2011 , DOI Show publication in PURE
2010
Michael Zehetbauer, R. Grössinger, Heinz Krenn, M. Krystian, R. Pippan, P. Rogl, T. Waitz and Roland Würschum Bulk nanostructured materials by severe plastic deformation Advanced Engineering Materials 12, 692-700, 2010 , DOI Show publication in PURE
Wolfgang Lechner, Werner Puff, G. Wilde and Roland Würschum Vacancy-type defects in amorphous and nanocrystalline Al alloys: Variation with preparation route and processing Scripta Materialia 62, 439-442, 2010 , DOI Show publication in PURE
Patrick Wahl, Thomas Traußnig, Stephan Landgraf, Hai-Jun Jin, Jörg Weissmüller and Roland Würschum Adsorption-driven tuning of the electrical resistance of nanoporous gold Journal of Applied Physics 8, 073706-1-073706-6, 2010 , DOI Show publication in PURE
Bernd Oberdorfer, Bernd Lorenzoni, K. Unger, Wolfgang Sprengel, M. Zehetbauer, R. Pippan and Roland Würschum Absolute concentration of free volume-type defects in ultrafine-grained Fe prepared by high-pressure torsion Scripta Materialia 63, 452-455, 2010 , DOI Show publication in PURE
Bernd Oberdorfer, Eva - Maria Steyskal, Wolfgang Sprengel, Werner Puff, P. Pikart, C. Hugenschmidt, M. Zehetbauer, R. Pippan and Roland Würschum In-situ probing of fast defect annealing in Cu and Ni with a high-intensity positron beam Physical Review Letters 105, 146101-1-146101-4, 2010 , DOI Show publication in PURE
K Nadeem, Thomas Traußnig, Ilse Letofsky-Papst, H. Krenn, Ulrich Brossmann and Roland Würschum Sol-gel synthesis and characterization of single-phase Ni ferrite nanoparticles dispersed in SiCO2 matrix Journal of Alloys and Compounds 493, 385-390, 2010 , DOI Show publication in PURE
Martin Sagmeister, Ulrich Brossmann, Emil List, Rolf Ochs, Dorothee Vinga Szabó, Robert Saf, Werner Grogger, Elena Tchernychova and Roland Würschum Synthesis and optical properties of organic semiconductor: zirconia nanocomposites Journal of Nanoparticle Research , 2541-2551, 2010 , DOI Show publication in PURE