Concept

Heavy metals

Related publications (523)

Extremely metal-poor stars in classical dwarf spheroidal galaxies: Fornax, Sculptor, and Sextans

Pascale Jablonka, Pierre North, Martin Tafelmeyer

We present the results of a dedicated search for extremely metal-poor stars in the Fornax, Sculptor, and Sextans dSphs. Five stars were selected from two earlier VLT/Giraffe and HET/HRS surveys and subsequently followed up at high spectroscopic resolution ...

2010

Au-Fe alloy solidification and solid-state transformations

Michel Rappaz, Jean-Daniel Wagnière

In order to better understand the microstructure that forms during laser welding of an 18 carat gold and an austenitic stainless steel, solidification of the Au-Fe binary analog has been studied using thermal analysis and interrupted Bridgman experiments. ...

Elsevier2010

Evidence for core-hole-mediated inelastic x-ray scattering from metallic Fe1.087Te

Henrik Moodysson Rønnow, Marco Grioni, Thorsten Schmitt, Marco Guarise, Ping-Hui Lin, Dirk Van der Marel

We present a detailed analysis of resonant inelastic x-ray scattering from Fe1.087Te with unprecedented energy resolution. In contrast to the sharp peaks typically seen in insulating systems at the transition-metal L-3 edge, we observe spectra which show d ...

2010

Rapid chromium quantification in solid oxide fuel cell cathodes

Jan Van Herle, Josef Andreas Schuler, Pietro Tanasini

The detection and quantification of small quantities of Cr in (La,Sr)MnO3/Y–ZrO2 solid oxide fuel cell (SOFC) cathodes by energy-dispersive X-ray spectroscopy (EDXS) is not straightforward as Cr X-ray emission lines overlap with La/Mn and O lines. This wor ...

Elsevier2010

Self-assembled ordered mesoporous metals

Scott Charles Warren

Control over the structure of metals at the mesoscale (2-50 nm) is crucial for emerging applications such as energy conversion, sensing, and information processing. The self-assembly of nanoparticles with block copolymers provides a natural entry point to ...

2009

Toxic metal interactions with soil bacterium "Cupriavidus metallidurans"

Rita Hajdu Schenk

Living bacteria offer an ecological and cost-effective alternative to the classical physical and chemical techniques for the treatment of environmental contaminations. Although their increasing use in toxic metal removal, systematic studies on the influenc ...

EPFL2009

In-situ determination of trace metal species in surface waters of Black Sea coastal area: comparison to bioavailability by green microalgae

Trace metal speciation in seawater from the Bulgarian Black Sea coast was studied in situ by hollow fiber permeation liquid membrane (HF-PLM) and by diffusion gradients in thin- film gels (DGT). The concentrations of Cd, Cu, Ni, and Pb determined by HF- ...

2009

Dualities in plant tolerance to pollutants and their uptake and translocation to the upper plant parts

Jean-Paul Schwitzguebel

There is a duality in plant tolerance to pollutants and its response to the pollutants’ stress. On the one hand some plants, (hyper)tolerant to heavy metals, are able to hyperaccumulate these metals in shoots, which could be beneficial for phytoremediation ...

2009

Negative plasmon dispersion in the transition-metal dichalcogenide 2H-TaSe2

Helmuth Berger

We report about an electron energy-loss study on the dispersion of the charge-carrier plasmon in the charge-density-wave system 2H-TaSe2 above and below the metal-insulator transition. In both cases we find a negative slope, which is in remarkable contrast ...

2009

Development of a hyphenated analytical methodology for the fractionation and characterization of environmental colloids

Enrica Alasonati

Natural colloids are defined as macromolecules and nanoparticles with sizes ranging between 1 nm and 1 µm. Colloidal pool is complex "ill-defined" mixture of humic substances, exopolymeric substances (EPS), inorganic oxides, clays, etc. Aquatic colloids ha ...

EPFL2009

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