In-situ electron microscopy observation of alumina nanowire growth
Event details
| Date | 19.05.2014 |
| Hour | 13:15 › 14:15 |
| Speaker | Prof. Christina Scheu, Ludwig-Maximilians-Universität München, Germany |
| Location | |
| Category | Conferences - Seminars |
Ultrathin non-conducting nanowires are promising candidates for application in nanoelectronics and in drug-delivery systems. Ee have studied the self-catalytic vapor-liquid-solid (VLS) growth of alumina nanowires in-situ at 750 degrees Celsius in a high voltage transmission electron microscope [1]. The atomic scale observation revealed that the growth of the nanowire in [0001] direction takes place layer-by-layer involving a two-step mechanism. Oscillatory growth and dissolution reactions alternate at the top rim of the nanowire which is in contact to the liquid Al droplet and the vapor phase leading to periodical changes of the triple junction configuration. The dissolution reaction of the crystalline top rim supplies the oxygen which is required to grow a new (0006) alumina layer [1]. The growth of the (0006) layer is relatively fast since the Al atoms in the liquid adjacent to the crystalline alumina wire possess already similar position as in the solid [2]. This leads to an easy pathway for the interfacial diffusion of oxygen. The rate limiting step for growth of the alumina nanowire is the oxygen transport after completion of a new (0006) alumina layer when the crystalline rim is formed.
[1] Oh, Chisholm, Kauffmann, Kaplan, Luo, Rühle, Scheu, Science 330, 489 (2010).
[2] Oh, Kauffmann, Scheu, Kaplan, Rühle, Science 310, 661 (2005).
[3] The author would like to thank S. H. Oh, M. F. Chisholm, W. Luo, M. Rühle, Y. Kauffmann and W. D. Kaplan for the fruitful cooperation.
Bio: CURRICULUM VITAE
Prof. Dr. Christina Scheu
Department of Chemistry
Ludwig-Maximilians-University
Butenandtstr. 11
D- 81377 Munich
Germany
From: 1.4.2014
Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany and & Rheinisch-Westfaelische Technische Hochschule (RWTH) Aachen, Germany
Tel: 0049 89 2180 77184
Email: [email protected], [email protected]
PROFESSIONAL PREPARATION
Technische Hochschule Darmstadt Physics Diplom-Physikerin, 1993
(Germany)
Max-Planck-Institute for Metals Research
and University of Stuttgart (Germany) Materials Science Dr. rer. nat. (PhD), 1996
Technion, Israel Institute of Technology Metal-ceramic interfaces Postdoc, 1996-98
Dep. of Materials Eng., Haifa (Israel)
APPOINTMENTS
From April 2014 Full Professor at the Rheinisch-Westfaelische Technische Hochschule (RWTH) Aachen, Department of Material Chemistry & Independent Research Groups at the Max-Planck-Institut für Eisenforschung GmbH
Since 2008 Full Professor at the Ludwig-Maximilians University (LMU), Munich, Germany
2005 – 2008 Group Leader “Nano- and Microanalytics“ at the Department Metallurgy & Materials Testing, University of Leoben, Austria
2003 – 2005 Group Leader “Electron Microscopy and Metallography”at the
“Materialprüfungsanstalt (MPA)” der Universität Stuttgart, Germany
1999 – 2005 Senior scientist, Max-Planck-Institute for Metals Research, Stuttgart Germany
1996 – 1998 Postdoc, Technion, Israel Institute of Technology, Haifa, Israel
1992 – 1995 PhD student, Max-Planck-Institute for Metals Research and University of Stuttgart, Germany
HONORS AND AWARDS
1996 – 1998 Minerva-fellowship of the Max-Planck-Gesellschaft
2007 Houska Preis” 2006 (2. place), “Neuartiger Schnellarbeitsstahl mit spezieller Hochtemperatur-beschichtung” (“A new Steel with a Special High Temperature Coating”) together with H. Clemens, H. Leitner, P. Mayrhofer, C. Mitterer, M. Panzenböck
2008 Offer (declined) for Professor Position at the Friedrich-Alexander- Universität Erlangen-Nürnberg and offer (accepted) at the LMU Munich
SYNERGISTIC ACTIVITIES
Mentor in the faculty “Chemistry and Pharmacy” to support the career of woman in science (www.lmu.de/excellent/mentoring) , since April 2009
Symposium Chair “Thin films and Nanomaterials: Symposium A - MACAN11 Reconciling
Atomistic and Continuum Approaches to Interfaces“, European Materials Research Society (E-MRS), Spring Meeting, May 2011: Nice, France
Organisation NIM/CeNS Winter School 2011, March 2011, St. Christoph, Austria
Symposium Chair “Linking Synthesis, Properties and Microstructure” at the International Conference on Metallurgical Coatings and Thin Films (ICMCTF), April 2009, 2010, and 2011, San Diego, USA
Organisation of the session „Advanced Characterisation“ at the ICMCTF, • April 2006, 2007, and 2008, San Diego, USA
Organisation of the session „Thin Films, Layered Structures and Interfaces” at the „Micros-copy Conference 2007“, Sept. 2007, Saarbrücken, Germany
Organisation of the „4th German - Slovenian Seminar on Joint Projects in Materials Science & Technology”, Nov. 2000, Berlin, Germany
Organisation of the meeting „Oxford-Stuttgart Mingle”, March 2000, Stuttgart, Germany
Member of Excellence Cluster “Nanosystems Initiative Munich (NIM)
Advisory Member of the Scientific Board for the Center for NanoScience (CeNS), Munich
Evaluator for Carl-Zeiss-Stiftung (Germany), Helmholtz Association (Germany), Israel Science Foundation (Israel), Ministry of Science, Culture & Sport (Israel) and Ministère des Affaires Etrangères (France), DFG (Germany), Thüringer Kultusministerium (Germany), Ministerium für Innovation, Wissenschaft, Forschung und Technologie des Landes Nordrhein-Westfalen (Germany),
EXPIERIENCE IN TEACHING AND SUPERVISION
Teaching at University (Lectures for Bachelor- and Master students):
Physikalische Chemie I, Begleitende Vorlesung zum Grundpraktikum/Teilgebiet Physika-lischen Chemie, Electron Microscopy and Analytical Techniques ,Solid State Spectroscopy, Introduction to TEM, Phasenumwandlungen und Ausscheidungen in metallischen Werk-stoffen und deren Charakterisierung, Transmissionselektronenmikroskopie I, Trans¬missions¬-elektronenmikroskopie II; Teaching and organization of laboratory courses in physical chemistry, electron microscopy, TEM
Supervision of 18 PhD students, 15 Master students, 5 Bachelor students and several postdocs
RESEARCH INTERESTS
• Structural and chemical analysis of materials with high spatial resolution and correlation to properties
• Exploring chemistry, bonding and atomic and electronic structure of interfaces and
nanostructured materials
• Transmission electron microscopy (TEM): high resolution and in-situ TEM methods,
electron, energy loss spectroscopy (EELS), electron energy-loss near-edge structure
(ELNES) analysis
- materials for energy generation and storage
5 SELECTED PUBLICATIONS
In total 168 publications (115 in journals, 51 conferences proceedings, 2 book chapters (h-index 24).
Electronic structure of KCa2Nb3O10 as envisaged by density functional theory and valence electron energy loss spectroscopy
K. S. Virdi, Y. Kauffmann, C. Ziegler, P. Ganter, B. V. Lotsch, W. D. Kaplan, P.Blaha, and C. Scheu
Phys. Rev. B 2013, 87, 115108.
Increasing crystallinity for improved electrical conductivity of TiO2 blocking layers
A. S. Wochnik, M. Handloser, D. Durach, A. Hartschuh, and C. Scheu
ACS Applied Materials &Interfaces 2013, 5 (12), 5696.
Influence of strain on the electronic structure of the TbMnO3/SrTiO3 epitaxial interface
S. Venkatesan, M. Döblinger, C. Daumont, B. Kooi, B. Noheda, J. T. M. De Hosson, and C. Scheu
Appl. Phys. Lett. 2011, 99, 222902.
Oscillatory Mass Transport in Vapor-Liquid-Solid Growth of Sapphire Nanowires
S. H. Oh, M. F. Chisholm, Y. Kauffmann, W. D. Kaplan, W. Luo, M. Rühle, and C. Scheu
Science 2010, 330, 489.
Ordered Liquid Aluminum at the Interface with Sapphire
S. H. Oh, Y. Kauffmann, C. Scheu, W. D. Kaplan, and M. Rühle
Science 2005, 310, 661.
[1] Oh, Chisholm, Kauffmann, Kaplan, Luo, Rühle, Scheu, Science 330, 489 (2010).
[2] Oh, Kauffmann, Scheu, Kaplan, Rühle, Science 310, 661 (2005).
[3] The author would like to thank S. H. Oh, M. F. Chisholm, W. Luo, M. Rühle, Y. Kauffmann and W. D. Kaplan for the fruitful cooperation.
Bio: CURRICULUM VITAE
Prof. Dr. Christina Scheu
Department of Chemistry
Ludwig-Maximilians-University
Butenandtstr. 11
D- 81377 Munich
Germany
From: 1.4.2014
Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany and & Rheinisch-Westfaelische Technische Hochschule (RWTH) Aachen, Germany
Tel: 0049 89 2180 77184
Email: [email protected], [email protected]
PROFESSIONAL PREPARATION
Technische Hochschule Darmstadt Physics Diplom-Physikerin, 1993
(Germany)
Max-Planck-Institute for Metals Research
and University of Stuttgart (Germany) Materials Science Dr. rer. nat. (PhD), 1996
Technion, Israel Institute of Technology Metal-ceramic interfaces Postdoc, 1996-98
Dep. of Materials Eng., Haifa (Israel)
APPOINTMENTS
From April 2014 Full Professor at the Rheinisch-Westfaelische Technische Hochschule (RWTH) Aachen, Department of Material Chemistry & Independent Research Groups at the Max-Planck-Institut für Eisenforschung GmbH
Since 2008 Full Professor at the Ludwig-Maximilians University (LMU), Munich, Germany
2005 – 2008 Group Leader “Nano- and Microanalytics“ at the Department Metallurgy & Materials Testing, University of Leoben, Austria
2003 – 2005 Group Leader “Electron Microscopy and Metallography”at the
“Materialprüfungsanstalt (MPA)” der Universität Stuttgart, Germany
1999 – 2005 Senior scientist, Max-Planck-Institute for Metals Research, Stuttgart Germany
1996 – 1998 Postdoc, Technion, Israel Institute of Technology, Haifa, Israel
1992 – 1995 PhD student, Max-Planck-Institute for Metals Research and University of Stuttgart, Germany
HONORS AND AWARDS
1996 – 1998 Minerva-fellowship of the Max-Planck-Gesellschaft
2007 Houska Preis” 2006 (2. place), “Neuartiger Schnellarbeitsstahl mit spezieller Hochtemperatur-beschichtung” (“A new Steel with a Special High Temperature Coating”) together with H. Clemens, H. Leitner, P. Mayrhofer, C. Mitterer, M. Panzenböck
2008 Offer (declined) for Professor Position at the Friedrich-Alexander- Universität Erlangen-Nürnberg and offer (accepted) at the LMU Munich
SYNERGISTIC ACTIVITIES
Mentor in the faculty “Chemistry and Pharmacy” to support the career of woman in science (www.lmu.de/excellent/mentoring) , since April 2009
Symposium Chair “Thin films and Nanomaterials: Symposium A - MACAN11 Reconciling
Atomistic and Continuum Approaches to Interfaces“, European Materials Research Society (E-MRS), Spring Meeting, May 2011: Nice, France
Organisation NIM/CeNS Winter School 2011, March 2011, St. Christoph, Austria
Symposium Chair “Linking Synthesis, Properties and Microstructure” at the International Conference on Metallurgical Coatings and Thin Films (ICMCTF), April 2009, 2010, and 2011, San Diego, USA
Organisation of the session „Advanced Characterisation“ at the ICMCTF, • April 2006, 2007, and 2008, San Diego, USA
Organisation of the session „Thin Films, Layered Structures and Interfaces” at the „Micros-copy Conference 2007“, Sept. 2007, Saarbrücken, Germany
Organisation of the „4th German - Slovenian Seminar on Joint Projects in Materials Science & Technology”, Nov. 2000, Berlin, Germany
Organisation of the meeting „Oxford-Stuttgart Mingle”, March 2000, Stuttgart, Germany
Member of Excellence Cluster “Nanosystems Initiative Munich (NIM)
Advisory Member of the Scientific Board for the Center for NanoScience (CeNS), Munich
Evaluator for Carl-Zeiss-Stiftung (Germany), Helmholtz Association (Germany), Israel Science Foundation (Israel), Ministry of Science, Culture & Sport (Israel) and Ministère des Affaires Etrangères (France), DFG (Germany), Thüringer Kultusministerium (Germany), Ministerium für Innovation, Wissenschaft, Forschung und Technologie des Landes Nordrhein-Westfalen (Germany),
EXPIERIENCE IN TEACHING AND SUPERVISION
Teaching at University (Lectures for Bachelor- and Master students):
Physikalische Chemie I, Begleitende Vorlesung zum Grundpraktikum/Teilgebiet Physika-lischen Chemie, Electron Microscopy and Analytical Techniques ,Solid State Spectroscopy, Introduction to TEM, Phasenumwandlungen und Ausscheidungen in metallischen Werk-stoffen und deren Charakterisierung, Transmissionselektronenmikroskopie I, Trans¬missions¬-elektronenmikroskopie II; Teaching and organization of laboratory courses in physical chemistry, electron microscopy, TEM
Supervision of 18 PhD students, 15 Master students, 5 Bachelor students and several postdocs
RESEARCH INTERESTS
• Structural and chemical analysis of materials with high spatial resolution and correlation to properties
• Exploring chemistry, bonding and atomic and electronic structure of interfaces and
nanostructured materials
• Transmission electron microscopy (TEM): high resolution and in-situ TEM methods,
electron, energy loss spectroscopy (EELS), electron energy-loss near-edge structure
(ELNES) analysis
- materials for energy generation and storage
5 SELECTED PUBLICATIONS
In total 168 publications (115 in journals, 51 conferences proceedings, 2 book chapters (h-index 24).
Electronic structure of KCa2Nb3O10 as envisaged by density functional theory and valence electron energy loss spectroscopy
K. S. Virdi, Y. Kauffmann, C. Ziegler, P. Ganter, B. V. Lotsch, W. D. Kaplan, P.Blaha, and C. Scheu
Phys. Rev. B 2013, 87, 115108.
Increasing crystallinity for improved electrical conductivity of TiO2 blocking layers
A. S. Wochnik, M. Handloser, D. Durach, A. Hartschuh, and C. Scheu
ACS Applied Materials &Interfaces 2013, 5 (12), 5696.
Influence of strain on the electronic structure of the TbMnO3/SrTiO3 epitaxial interface
S. Venkatesan, M. Döblinger, C. Daumont, B. Kooi, B. Noheda, J. T. M. De Hosson, and C. Scheu
Appl. Phys. Lett. 2011, 99, 222902.
Oscillatory Mass Transport in Vapor-Liquid-Solid Growth of Sapphire Nanowires
S. H. Oh, M. F. Chisholm, Y. Kauffmann, W. D. Kaplan, W. Luo, M. Rühle, and C. Scheu
Science 2010, 330, 489.
Ordered Liquid Aluminum at the Interface with Sapphire
S. H. Oh, Y. Kauffmann, C. Scheu, W. D. Kaplan, and M. Rühle
Science 2005, 310, 661.
Links
Practical information
- General public
- Free
Organizer
- Holger Frauenrath
Contact
- Holger Frauenrath