Properties of Nanomaterials
The large amount of grain boundaries in bulk materials made of nanoparticles allows extended grain boundary sliding leading to high
Due to their large surface, nanoparticles made of transition element oxides exhibit interesting catalytic properties. In special cases,
catalysis may be enhanced and more specific by decorating these particles with gold or platinum clusters.
In magnetic nanoparticles, the energy of magnetic anisotropy may be that small that the vector of magnetization fluctuates thermally;
this is called superparamagnetism. Such a material is free of remanence, and coercitivity. Touching superparamagnetic particles are
loosing this special property by interaction, except the particles are kept at distance. Combining particles with high energy of
anisotropy with superparamagnetic ones leads to a new class of permanent magnetic materials.
Distributions of non-agglomerated nanoparticles in a polymer are used to tune the index of refraction. Additionally, such a process may
produce materials with non-linear optical properties. Gold or CdSe nanoparticles in glass lead to red or orange coloration.
Semi-conducting nanoparticles and some oxide-polymer nanocomposites exhibit fluorescence showing blue shift with decreasing particle
For further information please visit our Intensive Course Nanomaterials.