Consortium of Swiss Academic Libraries

Hydrogen storage methods

Züttel, Andreas

In: Naturwissenschaften, 2004, vol. 91, no. 4, p. 157-172

Université de Fribourg

Hydrophobic hydration of poly-N-isopropyl acrylamide: a matter of the mean energetic state of water

Bischofberger, Irmgard ; Calzolari, D. C. E. ; Rios, Paolo De Los ; Jelezarov, I. ; Trappe, Véronique

In: Scientific Reports, 2014, vol. 4, p. -

The enthalpically favoured hydration of hydrophobic entities, termed hydrophobic hydration, impacts the phase behaviour of numerous amphiphiles in water. Here, we show experimental evidence that hydrophobic hydration is strongly determined by the mean energetics of the aqueous medium. We investigate the aggregation and collapse of an amphiphilic polymer, poly-N-isopropyl acrylamide (PNiPAM), in...

Université de Fribourg

High-resolution X-ray study of the multiple ionization of Pd atoms by fast oxygen ions

Czarnota, M. ; Banaś, D. ; Berset, Michel ; Chmielewska, D. ; Dousse, Jean-Claude ; Hoszowska, Joanna ; Maillard, Yves-Patrick ; Mauron, Olivier ; Pajek, M. ; Polasik, M. ; Raboud, Pierre-Alexandre ; Rzadkiewicz, J. ; Słabkowska, K. ; Sujkowski, Z.

In: The European Physical Journal D, 2010, p. -

The multiple ionization of the L- and M-shells of Pd by fast oxygen ions has been studied by measuring with high-resolution the satellite structures of the Lα1,2 X-ray transitions. Relativistic multi-configuration Dirac-Fock (MCDF) calculations were used to interpret the complex X-ray spectrum, allowing to derive the number of L- and M-shell spectator vacancies at the moment of the...

Université de Fribourg

Hydrogen density in nanostructured carbon, metals and complex materials

Züttel, Andreas ; Wenger, Pascal ; Sudan, Patrick ; Mauron, Philippe ; Orimo, Shin-ichi

In: Materials Science and Engineering B, 2004, vol. 108, p. 9-18

The challenge in the research on hydrogen storage materials is to pack hydrogen atoms or molecules as close as possible. Hydrogen absorbed in metals can reach a density of more than 150 kg m⁻³ (e.g. Mg₂FeH₆ or Al(BH₄)₃) at atmospheric pressure. For metallic hydrides, however, due to the large atomic mass of the transition metals the gravimetric hydrogen density is limited to less than...