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Joint Research Laboratory Nanomaterials The Joint Research Laboratory Nanomaterials was established in 2004 to enhance the cooperation between the Institute for Nanotechnology at the Forschungszentrum Karlsruhe and the Institute of Materials Science at the Technische Universität Darmstadt. The startup to establish the laboratory was provided by both institutions. Scientific personell is financed by the Forschunszentrum Karlsruhe and by external grants of funding agencies in Germany and of the EU as well as by industrial cooperations. The laboratory interacts in several areas with research groups in Materials Science and Chemistry. The research activities are concentrated in the area of nanoparticulate systems, their synthesis and processing, microstructural characterization and their properties. The focus is currently on developing nanoporous structures as bulk materials and thin films on a variety of substrates for developing catalyst support materials and catalysts, gas sensors and templates for the growth of light-harvesting molecular structures (porphyrines) and the development of alternative solar cells for low light conditions. An additional engineering focus of the research is on the stability of nanostructured materials under operation conditions, such as high temperatures and gas environments, as well as the study of mechanical performance of nanoporous structures. The nanomaterials are prepared using Chemical Vapor Synthesis and Nebulized Spray Pyrolysis starting from metal-organic precursors and metal salts. Using these methods a wide range of nanostructures can be synthesized. In addition to several synthesis systems, characterization equipment is available including X-ray diffraction, nitrogen adsorption, light scattering and Zeta potential and gas chromatography. Staff Members Head Research Associates Dr. Hermann Sieger Secretary Prof. Dr.-Ing. Horst Hahn (Director Institute for Nanotechnology) Renate Hernichel PhD Students Dipl.-Ing. Thorsten Enz Dipl.-Ing. Sebastian Gottschalk Dipl.-Ing. Peter Marek Dipl.-Ing. Simon Bubel Diploma Students Johannes Kostka Guest Scientists Jens Suffner Prof. Ali Beitollahi Dr. V. Mahender Dr. M. Karajai - 56 - Dr. Jens Ellrich Dr. Holger Schmitt Dipl.-Ing. Jens Suffner Dipl.-Ing. Azad Jaberidarbandi Dipl. Phys. Anna Castrup Ravi Mohan Prasad
Research Projects Defect structure and diffusion in ferroelectric materials (SFB 595 2003 – 2006) Processing of Nanostructured Materials through Metastable Transformations Namamet (EU 2004 – 2009) DIRAC secondary-Beams (EU/GSI 2005 – 2008) Plastizität in Nanokristallinen Metallen und Legierungen, Teilprojekt 5, Aufklärung von Verformungsmechanismen mittels Synchrotron-Röntgenstrahlung (DFG 2006 – 2009) Metallische Nanogläser (DFG 2006 – 2008) Publications Enz, T.; Winterer, M.; Stahl, B.; Bhatacharya, S.; Miehe, G.; Foster, K.; Fasel, C.; Hahn, H.; Structure and magnetic properties of iron nanoparticles stabilized in carbon, Journal of Applied Physics, 99 (4) (2006) 044306 Sieger, H.; Suffner, J.; Raju, A.R.; Miehe, G.; Hahn, H.; Thermal Stability of Nanocrystalline Sm2 O3 and Sm2 O3 –MgO, Journal Amer. Ceram. Soc. 89 (2006) 979-984 Marek, P.; Balaban, S.; Nachrichten aus der Chemie, 54, (2006) 1072-1077 Jin, Z. H.; Gumbsch, E.; Albe, K.; Hahn, H.; Gleiter, H.; The Interaction mechanism of screw dislocations with coherent twin boundaries in different face-centred cubic metals, Scripta Materialia, 54 ( 2006) 1163-1168 Kruk, R.; Ghafari, M.; Hahn, H.; Birringer, R.; Michels, D.; Kmiec, R.; Marszalek, M., Grainsize-dependent magnetic properties of nanocrystalline Gd., Physical Review B, 2006, 73 (2006) 054420 Schmitt, H.; Ghafari, M; Kruk, R.; Schmitt, L.A.; Ellrich, J.; Hütten, A.; Hahn, H.; Interfacial microstructure of Fe/AlOx/Fe-magnetic tunnel junctions in high resolution, Applied Physics Letters 88 (2006) 122505 Akurati, K.K.; Bhattacharya S.S.; Winterer, M.; Hahn, H.: Synthesis, characterization and sintering of nanocrystalline titania powders produced by chemical vapour synthesis, J. Phys. 39 (2006) 2248-2254 Yin, S.; Xu, M.X.; Yang, L.; Liu, F.J.; Rösner, H.; Hahn, H.; Gleiter, H.;Schild, D.; Doyle,S.; Liu, T.; Hu T.D.; Takayama-Muromachi, E.; Jiang J.Z.; Absence of ferromagnetism in bulk polycrystalline Zn0.9Coo.1O. Phys.Rev. B73 (2006) 224408 Zhao, Shi-Jin.; Albe, K.; Hahn, H.; Grain size dependence of the bulk modulus of nanocrystalline nickel, Scripta Materialia 55 (2006) 473-476 Brehm, J.; Winterer, M.; Hahn, H.; Synthesis and Structure of Nanocrystalline Transparent Conducting Zinc Oxides, J. Appl. Phys. 100 (2006) 064311 Bansal, C.; Sarkar, A.K.; Mishra, A:K.; Abraham, T.; Lemier, Ch.; Hahn, H.; Electronically tunable conductivity of a nanoporous Au-Fe alloy, Scripta Materialia 56 (2006) 705-708 Padmanabhan, K.A.; Dinda, G.P.; Hahn, H.; Gleiter, H.; Inverse Hall-Petch effect and grain boundary sliding controlled flow in nanocrystalline materials, Accepted in Materials Science and Engineering A (2006) - 57 -
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ANNUAL REPORT 2 0 0 6 FACULTY OF MA
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Annual Report 2006 Faculty 11 Mater
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Preface The year 2006 of the Depart
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Page 10 and 11: Institute of Materials Science Phys
Page 12 and 13: Research Projects Bulk Amorphous Al
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Page 16 and 17: Das, J.; Kim, K. B.; Xu, W.; Wei, B
Page 18 and 19: Staff Members Head Prof. Dr. Jürge
Page 20 and 21: Zhou L.; Rixecker G.; Aldinger F.;
Page 22 and 23: concerned with the synthesis and ch
Page 24 and 25: Publications Fleissner, A.; Schmid,
Page 26 and 27: • Surface analysis The UHV-surfac
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Page 44 and 45: hexakis(imidazole)nickel(II)bis(for
Page 46 and 47: Chemical Analytics The chemical ana
Page 48 and 49: Collaborations The above mentioned
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Page 54 and 55: Materials Modelling The research ac
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Fig. 1: Proposed models for a) Pt,
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Synthesis of oxide-polymer nanocomp
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Diploma Theses Böhme, Mario; Herst
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Sperling, Sebastian; Untersuchungen
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Institute of Applied Geosiences Phy
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Research Projects Geomorphology and
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Engineering Geology Engineering Geo
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Investigation of a Doline in NE-Hes
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Applied Sedimentology Sedimentary r
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econstruction.(Diploma thesis in co
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Darmstadt University of Technology
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Geomaterials Science Geomaterial Sc
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Gregori, G.; Kleebe H.-J.; Sorarù,
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Hessische Industriemüll GmbH). Due
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Technical Personnel Josef Kolb, Dip
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Research Projects Environmental sca
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Fig. 1: Aerial photo of the Lake Li
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Lithological Map of the Japanese Ar
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tower stripping, and therefore much
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Diffusion and reaction in micro- an
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Rift dynamics, uplift and climate c
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Geology, land use change and erosio
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nearly half a century has been perf
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The Effect of LiF Addition on the S
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In case of the undoped sintered B6O
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Microstructures in Omphacite and Ot
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Modelling phase-assemblage diagrams
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As an example, Fig. 2 shows the che
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MATERIALS SCIENCE Physical Metallur
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