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3D metal freeform micromanufacturing

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Magnetoelectric micromachines with wirelessly controlled navigation and functionality

Mahmut Selman Sakar

The use of a single energy source for both manipulating micromachines and triggering their functionalities will result in highly integrated devices and simplify the design of the controlling platform. Here, we demonstrate this concept employing magnetoelec ...

2016

Remotely Controlled Isomer Selective Molecular Switching

Klaus Kern, Hagen Klauk, Uta Schlickum, Peter Wahl, Ivan Pentegov, Verena Katharina Schendel

Non local addressing-the "remote control"- of molecular switches promises more efficient processing for information technology, where fast speed of switching is essential. The surface state of the (111) facets of noble metals, a confined two-dimensional el ...

Amer Chemical Soc2016

Rational Catalyst Design for Selective Hydrogenations

Daniel André Samuel Lamey

Catalyst design for selective hydrogenations is of major importance for the manufacturing of fine chemicals. Catalytic procedure which uses scarce and expensive noble metals is very challenging in terms of exclusive attack of a single functionality or subs ...

EPFL2015

One-Pot Polyol Synthesis of Pt/CeO2 and Au/CeO2 Nanopowders as Catalysts for CO Oxidation

Christian Ludwig, Andrea Testino, Mohamed Tarik, Frank Pilger

The facile one-pot synthesis of CeO2-based catalysts has been developed to prepare a relatively large amount of nanopowders with relevant catalytic activity towards CO oxidation. The method consists of a two-steps process carried out in ethylene glycol: in ...

Amer Scientific Publishers2015

Dynamic structure factors of Cu, Ag, and Au: Comparative study from first principles

Cécile Hébert, Audrius Alkauskas, Simon Schneider

We present a comparative theoretical and experimental study of dynamic structure factors (momentum-dependent loss functions) of the noble metals Cu, Ag, and Au in the energy range of 0-60 eV. The emphasis is on theoretical results that are compared with ne ...

Amer Physical Soc2013

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This study addresses the DC-magnetron sputtering (DCMS) of Ag-films on polyester and compares the results found for the E. coli inactivation with the inactivation obtained when applying highly ionized pulse plasma power magnetron sputtering (HIPIMS). The a ...

Elsevier2012

Carbon dioxide methanation was carried out over a series of Ni-CexZr1-xO2 catalysts prepared by a pseudo sol-gel method. The influence of CeO2/ZrO2 mass ratio and noble metal addition was investigated. The catalysts were subsequently characterized by means ...

2011

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A giant spin splitting has been observed in surface alloys on noble metal (111) surfaces as a result of a strong structural modification at the surface as well as the large atomic spin-orbit interaction (SOI) of the alloy atoms. These surface alloys are an ...

2011

Accumulation and translocation capacity of As, Co, Cr and Pb by forage plants

Jean-Paul Schwitzguebel

Arsenic, chromium, cobalt and lead are among the most metalloid and metals present in the environment. When present in soil and water, they can be accumulated inside living organisms, enter several food chains and due to their toxicity affect human health. ...

2011

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