Université de Fribourg

Ag Nanoencapsulation for Antimicrobial Applications

Abram, Sarah-Luise ; Gagnon, Jacinthe ; Priebe, Magdalena ; Hérault, Nelly ; Fromm, Katharina M.

In: CHIMIA International Journal for Chemistry, 2018, vol. 72, no. 4, p. 249–252

Biomaterial-related infections remain a significant challenge in medicine. Antimicrobial materials on the basis of Ag nanoparticles represent a promising solution for this issue. Therefore several Ag-containing nanocontainers and nanorattles have been synthesized and characterized that exhibit remarkable control over the release of Ag+ as antimicrobial active species. Their biological...

Université de Fribourg

Threading salen-type Cu- and Ni-complexes into one-dimensional coordination polymers: solution versus solid state and the size effect of the alkali metal ion

Finelli, Alba ; Hérault, Nelly ; Crochet, Aurélien ; Fromm, and Katharina M.

In: Crystal Growth & Design, 2018, vol. 18, no. 2, p. 1215–1226

Compartmentalization of metal ions is crucial in biology as well as in materials science. For the synthesis of single source precursors, the preorganization of different metal ions is of particular interest for the low-temperature generation of mixed metal oxides. On the basis of a potentially Ω-shaped salen-type ligand providing an N2O2 as well as an O2O2 coordination site, mixed metal...

Université de Fribourg

Influence of the sacrificial polystyrene removal pathway on the TiO₂ nanocapsule structure

Hérault, Nelly ; Fromm, Katharina M.

In: Helvetica Chimica Acta, 2017, vol. 100, no. 6, p. -

This study demonstrates the significant influence of the polystyrene removal pathway on the TiO₂ nanocapsules obtained from PS@TiO₂ core-shell particles. In a first step, the polystyrene spheres were coated with titanium oxide via hydrolysis and condensation of the titanium precursor to form PS@TiO₂ core-shell particles. Then, the creation of the empty cavity to form TiO₂ nanocapsules was...