Roland Würschum

 

Univ.-Prof. Dr.rer.nat.
Institutsleiter 

Wissenschaftliche Arbeitsgebiete:

Energierelevante Materialien und Nanomaterialien
Defekte und Umwandlungen von Festkörpern

 

Liste aller Publikationen unter ORCID

Akademische Funktionen:

Studiendekan für die Fachrichtung Physik (2010-2017) und für die Fachrichtung Advanced Materials Science (2008-2017)

Vorsitzender der Curricula-Kommission für Bachelor-, Master- und Diplomstudien der TU Graz (2010-2017)

Dekan der Fakultät für Mathematik, Physik und Geodäsie (seit 2020; Stellvertreter: 2018-2019)

Werdegang:

seit Oktober 2000

Professor für Materialphysik am Institut für Technische Physik (ab 2004 Institut für Materialphysik) der TU Graz

1999-2000
Wissenschaftlicher Mitarbeiter, Institut für Nanotechnologie, Forschungszentrum Karlsruhe

bis 1998
Wissenschaftlicher Mitarbeiter, Institut für Theoret. und Angew. Physik, Universität Stuttgart

1997
Habilitation (Lehrfach Physik), Universität Stuttgart

1991-92
Postdoc am Massachusetts Institute of Technology

1989
Promotion (Dr.rer.nat.), Universität Stuttgart

Preise und Auszeichnungen:

1991/92
Feodor-Lynen Stipendium der Alexander von Humboldt-Stiftung

2007
Forschungspreis für Nanotechnologie und Nanowissenschaften des Landes Steiermark

2017
Erzherzog-Johann-Medaille der TU Graz

Liste ausgewählter Publikationen:

Structure of nanometer-sized polycrystalline iron investigated by positron lifetime spectroscopy, H.-E.Schaefer, R.Würschum, R.Birringer, and H.Gleiter, Phys. Rev. 38 (1988) 9545-9554

Defects in semiconductors after electron irradiation or in high-temperature thermal equilibrium, as studied by positron annihilation, R.Würschum, W.Bauer, K.Maier, A.Seeger, and H.-E.Schaefer, J. Phys.:Condens.Matter 1 (1989) SA 33-48

In-situ study of the migration of grain boundary facets in Au bicrystals under high driving forces, R. Würschum and R. W. Balluffi, phys. stat. sol. (a) 136 (1993) 323-336, , 

A simultaneous study of vacancy formation and migration at high temperatures in B2-type Fe-Aluminides, R. Würschum, C. Grupp, and H.-E. Schaefer, Phys. Rev. Lett. 75 (1995) 97-100

Nuclear spectroscopy of nanocrystalline metals and alloys, R. Würschum, Nanostruct. Mater. 6 (1995) 93-104

Thermal vacancy formation and self-diffusion in intermetallic Fe3Si-crystallites of nanocomposite alloys, R. Würschum, P. Farber, R. Dittmar, P. Scharwaechter, W. Frank, and H.-E. Schaefer, Phys. Rev. Lett. 79 (1997) 4918-4921

Time-Differential Length Change Measurements for Thermal Defect Investigations - Intermetallic B2-FeAl and B2-NiAl Compounds, a Case Study, H.-E. Schaefer, K. Frenner, and R. Würschum, Phys. Rev. Letters 82 (1999) 948-951
Review of the paper by R.W. Cahn: Measures of crystal vacancies, Nature 397 (1999) 656.

Nanocrystalline materials: a way to solids with tunable electronic structures and properties?, H. Gleiter, J. Weißmüller, O. Wollersheim, and R. Würschum, Acta Materialia 49 (2001) 737-745

Voltage-induced reversible strain in a metal, J. Weissmüller, R.N. Viswanath, D. Kramer, P. Zimmer, R. Würschum, and H. Gleiter, Science 300 (2003) 312-315
Review of the paper by R.H. Baughman: Muscles Made from Metal, Science 300 (2003) 268.

Diffusion in nanocrystalline metals and alloys – a status report, R. Würschum, S. Herth, and U. Brossmann, Advanced Engin. Mater. 5 (2003) 365-372

Self-diffusion in liquid interfaces, S. Herth, Feng Ye, M. Eggersmann, O. Gutfleisch, and R. Würschum, Phys. Rev. Letters 92 (2004) 095901

Diffusion and induced magnetic anisotropy in nanocrystalline Fe73.5Si13.5B9Nb3B1, S. Herth, M. Eggersmann, G. Herzer, and R. Würschum, Phil. Mag. Letters 84 (2004) 531-537

Electrically Tunable Resistance of a Metal, M. Sagmeister, U. Brossmann, S. Landgraf, and R. Würschum, Phys. Rev. Letters 96 (2006) 156601

Tuneable Magnetic Susceptibility of Nanocrystalline Palladium, H. Drings, R.N. Viswanath, D. Kramer, Chr. Lemier, J. Weissmüller, and R. Würschum, Appl. Phys. Letters 88 (2006) 253103

Chemical sensitive free volume study of amorphization of Cu60Zr40 induced by cold rolling and folding, W. Puff, H. Rabitsch, G. Wilde, G.P. Dinda, and R. Würschum, J. Appl. Phys. 101 (2007) 123512

In-situ dispersion of ZrO2 nanoparticles coated with pentacene, M. Sagmeister, U. Brossmann, E. List , R. Ochs, D.V. Szabo, R. Würschum, phys. stat. sol., rapid research letters 2 (2008) 203

Positron trapping model for point defects and grain boundaries in polycrystalline materials, B. Oberdorfer and R. Würschum,
Phys. Rev. B 79 (2009) 184103

Absolute concentration of free volume-type defects in ultra-fine grained Fe prepared by high pressure torsion, B. Oberdorfer, B. Lorenzoni, K. Unger, W. Sprengel, M. Zehetbauer, R. Pippan, and R. Würschum, Scripta materialia 63 (2010) 452

Adsorption-driven tuning of the electrical resistance of nanoporous gold, P. Wahl, Th. Traußnig, St. Landgraf, Hai-Jun Jin, J. Weissmüller, and R. Würschum, J. Appl. Phys. 108 (2010) 073706

In-situ probing of fast defect annealing in Cu and Ni with a high-intensity positron beam, B. Oberdorfer, Eva-Maria Steyskal, W. Sprengel, W. Puff, Ph. Pikart, Chr. Hugenschmidt, M. Zehetbauer, R. Pippan, and R. Würschum, Phys. Rev. Letters 105 (2010) 146101

Magnetization of Fe-oxide based nanocomposite tuned by surface charging, Th. Traußnig, St. Topolovec, K. Nadeem, D.V. Szabó, H. Krenn, and R. Würschum, phys. stat. sol., rapid research letter 4 (2011) 150-152

Direct experimental determination of grain boundary excess volume in metals, E.-M. Steyskal, B. Oberdorfer, W. Sprengel, M. Zehetbauer, R. Pippan, and R. Würschum, Phys. Rev. Letters 108 (2012) 055504

Charging induced defect formation in LixCoO2 studied by the atomic sensitive method of positron annihilation spectroscopy, P. Parz, B. Fuchsbichler, S. Koller, B. Bitschnau, F.A. Mautner, W. Puff, and R. Würschum, Appl. Phys. Letters 102 (2013) 151901

Electrochemical cell for in situ electrodeposition of magnetic thin films in a superconducting quantum interference device magnetometer, St. Topolevec, H. Krenn, and R. Würschum, Review Scientific Instruments 86 (2015) 063903

Direct measurement of vacancy relaxation by dilatometry, J. A. Kotzurek, E.-M. Steyskal, B. Oberdorfer, A. Hohenwarter, R. Pippan, W. Sprengel, and R. Würschum, Appl. Phys. Letters 109 (2016) 021906

Continous monitoring of the bulk oxidation states in LiNi1/3Mn1/3Co1/3O2 electrodes during charging and discharging, G. Klinser, S. Topolovec, H. Kren, S. Koller, W. Gössler, H. Krenn, and R. Würschum, Appl. Phys. Letters 109 (2016) 213901

Dealloying progress during nanoporous structure evolution analyzed by in situ resistometry, E.-M. Steyskal, M. Seidl, M. Graf, R. Würschum, Phys. Chem. Chem. Phys. 19 (2017) 29880-29885

Diffusion-reaction model for positron trapping and annihilation at spherical extended defects and in precipitate-matrix composites, R. Würschum, L. Resch, G. Klinser, Phys. Rev. B. 97 (2018) 224108-1 -11

Quantitative volumetric identification of precipitates in dilute alloys using high-precision isothermal dilatometry, E. Hengge, R. Enzinger, M. Luckabauer, W. Sprengel, R. Würschum, Phil. Mag. Letters 98 (2018) 301-309

Operando monitoring of charging-induced defect formation in battery electrodes by positrons, G. Klinser, H. Kren, S. Koller, R. Würschum, Appl. Phys. Letters 114 (2019) 013905-1 - 4

Magneto-ionic switching of superparamagnetism in nanoporous Pd(Co), M. Gössler, M. Albu, G. Klinser, E.-M. Steyskal, R. Würschum, Small 15 (2019) 1904523.