Université de Fribourg

Transition from light diffusion to localization in three-dimensional amorphous dielectric networks near the band edge

Haberko, Jakub ; Froufe-Pérez, Luis S. ; Scheffold, Frank

In: Nature Communications, 2020, vol. 11, no. 1, p. 4867

AbstractLocalization of light is the photon analog of electron localization in disordered lattices, for whose discovery Anderson received the Nobel prize in 1977. The question about its existence in open three-dimensional materials has eluded an experimental and full theoretical verification for decades. Here we study numerically electromagnetic vector wave transmittance through realistic...

Université de Fribourg

A nano-rattle SnO2@carbon composite anode material for high-energy Li-ion batteries by melt diffusion impregnation

Maharajan, Sivarajakumar ; Kwon, Nam Hee ; Brodard, Pierre ; Fromm, Katharina M.

In: Nanomaterials, 2020, vol. 10, no. 4, p. 804

The huge volume expansion in Sn-based alloy anode materials (up to 360%) leads to a dramatic mechanical stress and breaking of particles, resulting in the loss of conductivity and thereby capacity fading. To overcome this issue, SnO2@C nano- rattle composites based on < 10 nm SnO2 nanoparticles in and on porous amorphous carbon spheres were synthesized using a silica template and tin melting...

Consortium of Swiss Academic Libraries

Damping of Selective-Laser-Melted NiTi for Medical Implants

de Wild, Michael ; Meier, Fabian ; Bormann, Therese ; Howald, Chaim ; Müller, Bert

In: Journal of Materials Engineering and Performance, 2014, vol. 23, no. 7, p. 2614-2619