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Université de Fribourg

A general method to label metal oxide particles with fluorescent dyes using aryldiazonium salts

Dechézelles, Jean-François ; Griffete, Nébéwia ; Dietsch, Hervé ; Scheffold, Frank

In: Particle & Particle Systems Characterization, 2013, p. -

Different metal oxide particles are dye labeled by a novel and versatile approach based on aryldiazonium salt chemistry. For dye labeling the particles, the simplicity of aryldiazonium salts to be grafted onto metallic or metal oxide surface is advantageous. The salt is used as a linking agent for attaching the fluorescent molecules.

Université de Fribourg

Temperature-sensitive poly(N-Isopropyl-Acrylamide) microgel particles: A light scattering study

Reufer, Mathias ; Díaz-Leyva, P. ; Lynch, I. ; Scheffold, Frank

In: European Physical Journal E, 2009///doi:10.1140/epje/i2008-10387-2

We present a light scattering study of aqueous suspensions of microgel particles consisting of poly(N-Isopropyl-Acrylamide) cross-linked gels. The solvent quality for the particles depends on temperature and thus allows tuning of the particle size. The particle synthesis parameters are chosen such that the resulting high surface charge of the particles prevents aggregation even in the maximally...