Publication

Core-shell Au@(TiO2, SiO2) nanoparticles with tunable morphology

Pierre Stadelmann, Anas Mouti
2010
Journal Articles

Abstract

A novel approach based on the Stober method allows breaking of the symmetry of core-shell systems based on metallic core and metal oxide shell. By adjusting the proportion of the TiO2 precursor with regard to the silica precursor, different morphologies of the particles have been obtained displacing the gold particle from center to eccentric positions leading to acorn-like and raspberry-like structure.

Official source

https://infoscience.epfl.ch/entities/publication/381c70f3-0afc-436f-9be0-8099861e66a5

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Pierre Stadelmann, Anas Mouti
2010
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/381c70f3-0afc-436f-9be0-8099861e66a5

About this result

Related concepts (20)

Stöber process

The Stöber process is a chemical process used to prepare silica (SiO2) particles of controllable and uniform size for applications in materials science. It was pioneering when it was reported by Werner Stöber and his team in 1968, and remains today the most widely used wet chemistry synthetic approach to silica nanoparticles. It is an example of a sol-gel process wherein a molecular precursor (typically tetraethylorthosilicate) is first reacted with water in an alcoholic solution, the resulting molecules then joining together to build larger structures.

Transition metal

In chemistry, a transition metal (or transition element) is a chemical element in the d-block of the periodic table (groups 3 to 12), though the elements of group 12 (and less often group 3) are sometimes excluded. The lanthanide and actinide elements (the f-block) are called inner transition metals and are sometimes considered to be transition metals as well. Since they are metals, they are lustrous and have good electrical and thermal conductivity.

Aerogel

Aerogels are a class of synthetic porous ultralight material derived from a gel, in which the liquid component for the gel has been replaced with a gas, without significant collapse of the gel structure. The result is a solid with extremely low density and extremely low thermal conductivity. Aerogels can be made from a variety of chemical compounds. Silica aerogels feel like fragile expanded polystyrene to the touch, while some polymer-based aerogels feel like rigid foams.

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