Marianela Escobar Castillo

Title : Laser ablation of nickel- and cobalt ferrite nanoparticles

Abstract:

Preparation of nanoparticles using Laser Ablation in Liquids is a well-stablished method that can provide materials with sizes less than 20 nm. We prepared nickel- and cobalt ferrite nanoparticles using this method and analysed the composition of the obtained powders. Furthermore, the magnetic and optical properties of the materials were also analysed. Our results show some breakdown products during the ablation process and that the nanoparticles have superparamagnetic behaviour. To separate the magnetic particles from the solution we used a High Gradient Magnetic Separator column and demonstrated that a small-particle cobalt ferrite fraction can be separated from larger ones using this technique.

Audience Take Away:

• The audience will learn that Laser Ablation in liquids is an easy and fast way to prepare nanoparticles of different materials and that the method is uncomplicated and can be used without complications.
• Laser Ablation is a fast method to prepare high purity nanoparticles in a range less than 20 nm
• We show that High-gradient magnetic separator can be used to fractionate the nanoparticles in different sizes, this method can also be used with other magnetic materials.
• Cobalt- and Nickel ferrite nanoparticles have catalytic behavior and can be used in different fields.

Biography:

M. Escobar-Castillo studied Chemistry at the Martin Luther University in Germany and graduated as Diploma-Chemist in 1995. She then joined the research group of Prof. A. Büge at the Institute of Pharmaceutical Chemistry, at the same university and she received her Dr. rer. nat. degree in 1999. Currently she is working at Materials Science Institute in the University of Duisburg-Essen, Germany. She has published different articles in the field of Nanotechnology, Catalysis, etc.