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  • The sol-gel synthesis of perovskites by an EDTA/citrate complexing method involves nanoscale solid state reactions

    Publication
    Solid State Sciences
    Feldhoff, A.; Arnold, M.; Martynczuk, J.; Gesing, Th. M.; Wang, H.

    Nowadays, sol–gel procedures are well established in the synthesis of complex oxides as they allow to obtain phase pure products and to control precisely their stoichiometry. This quality makes them a tool of choice for the preparation of perovskite-type oxides.

  • Precipitation behavior of Xe at grain boundaries in Si3N4 ceramic during implantation at elevated temperature

    Publication
    Journal of Nuclear Materials
    Heo, Y. U.; Takeguchi, M.; Mitsuishi, K.; Song, M.; Nakayama, Y.; Furuya, K.

    Upon implantating of Xe ions into silicon nitride ceramic at 800 °C, the precipitation of Xe at grain boundaries (GBs) was observed.

  • Reduction and immobilization of hexavalent chromium by microbially reduced Fe-bearing clay materials

    Publication
    Geochimica et Cosmochimica Acta
    Bishop, M. E.; Glasser, P.; Dong, H.; Arey, B. W.; Kovarik, L.

    Hexavalent chromium (Cr6+) is a major contaminant in the environment. As a redox-sensitive element, the fate and toxicity of chromium is controlled by reduction-oxidation (redox) reactions.

  • Fe and Mn oxidation states by TEM-EELS in fine-particle emissions from a Fe-Mn alloy making plant.

    Publication
    Environmental Science and Technology
    Marris, H.; Deboudt, K.; Flament, P.; Grobéty, B.; Gieré, R.

    Fine particles were sampled both inside the chimneys and in the near-field of an Fe-Mn-alloy manufacturing plant. The transfer from one point to another point in the environment, as well as the bioavailability and toxicity of these two metals, depend above all on their speciation.

  • High-angular-resolution electron energy loss spectroscopy of hexagonal boron nitride

    Publication
    Applied Physics Letters
    Arenal, R.

    High-angular-resolution electron energy loss spectroscopy (EELS) is used to study the anisotropic behavior of the boron and nitrogen K ionization edges in h-BN. This work makes significant progress toward improving the anisotropy measurements.

  • Low voltage EELS - How low?

    Publication
    Ultramicroscopy
    Stöger-Pollach, M.

    Using low beam energies in a (scanning) transmission electron microscope (S/TEM) has numerous advantages over higher beam energies. We discuss the performance of commonly available electron microscopes when being operated at reduced beam energies.

  • Advanced synthesis of materials for intermediate-temperature solid oxide fuel cells

    Publication
    Progress in Materials Science
    Shao, Z.

    Solid-oxide fuel cells (SOFCs) technology has a substantial potential in the application of clean and efficient electric power generation.

  • Imaging and quantifying the morphology of an organic–inorganic nanoparticle at the sub-nanometre level

    Publication
    Nature Nanotechnology
    van Schooneveld, M. M.; Gloter, A.; Stephan, O.; Zagonel, L. F.; Koole, R.; Meijerink, A.; Mulder W. J. M.; de Groot, F. M. F.

    The development of hybrid organic–inorganic nanoparticles is of interest for applications such as drug delivery, DNA and protein recognition, and medical diagnostics.

  • Mineralogy and petrology of comet 81P/wild 2 nucleus samples

    Publication
    Science
    Zolensky, M. E.; Zega, T. J.; Yano, H.; Wirick, S.; Westphal, A. J.; Weisberg, M. K.; Weber, I.; Warren, J. L.; Velbel, M. A.; Tsuchiyama, A.; Tsou, P.; Toppani, A.; Tomioka, N.; Tomeoka, K.; Teslich, K.; Taheri, M.; Susini, J.; Stroud, R.; Stephan, T.; Stadermann, F. J.; Snead, C. J.; Simon, S. B.; Simionovici, A.; See, T. H.; Robert, F.; Rietmeijer, F. J. M.; Rao, W.; Perronnet, M. C.; Papanastassiou, D. A.; Okudaira, K.; Ohsumi, K.; Ohnishi, I.; Nakamura-Messenger, K.; Nakamura, T.; Mostefaoui, S.; Mikouchi, T.; Meibom, A.; Matrajt, G.; Marcus, M. A.; Leroux, H.; Lemelle, L.; Le, L.; Lanzirotti, A.; Langenhorst, F.; Krot, A. N.; Keller, L. P.; Kearsley, A. T.; Joswiak, D.; Jacob, D.; Ishii, H.; Harvey, R.; Hagiya, K.; Grossman, L.; Grossman, J. N.; Graham, G. A.; Gounelle, M.; Gillet, P.; Genge, M. J.; Flynn, G.; Ferroir, T.; Fallon, S.; Ebel, D. S.; Dai, Z. D.; Cordier, P.; Clark, B.; Chi, M.; Butterworth, A. L.; Brownlee, D. E.; Bridges, J. C.; Brennan, S.; Brearley, A.; Bradley, J. P.; Bleuet, P.; Bland, P. A.; Bastien, R.

    The bulk of the comet 81P/Wild 2 (hereafter Wild 2) samples returned to Earth by the Stardust spacecraft appear to be weakly constructed mixtures of nanometer-scale grains, with occasional much larger (over 1 micrometer) ferromagnesian silicates, Fe-Ni sulfides, Fe-Ni metal, and accessory phases.

  • Subparticle ultrafast spectrum imaging in 4D electron microscopy

    Publication
    Science
    Yurtsever, A.; van der Veen, R. M.; Zewail, A. H.

    Single-particle imaging of structures has become a powerful methodology in nanoscience and molecular and cell biology. We report the development of subparticle imaging with space, time, and energy resolutions of nanometers, femtoseconds, and millielectron volts, respectively.

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