|
||||||
|
||||||
|
||||
Light at the nanoscale. The interaction between electromagnetic radiation and free electrons in small metallic nanostructures or metal-dielectric interfaces of the order or less than the wavelength of light is governed by the type of metal, geometry, structure, size, wavelength and the surrounding medium. The behavior can be interpreted based on the existence of "plasmons" whose unique features make a "fingerprint" for each metal and can be appropriately used for metal nanoparticles sizing. It can also be used to determine the type of structures that nanoparticle presents: simple (bare core) and more complex spherical core-shell structures (metal-metal oxide or metal-dielectric). Applied results to the characterization of nickel, copper and silver colloidal suspensions generated by femtosecond laser ablation using the technique of optical extinction spectroscopy are presented, together with the theoretical design of a isolated silver particle sensor. Jesica Santillán is Assistant Researcher at the National Council for Science and Technology (CONICET) and Professor of Chemical Department at the National University of Catamarca (UNCa). She received her degree in Physics from National University of Catamarca (2006) and her PhD in Physics from National University of La Plata (2013). Currently, she belongs to the Plasmonics research group at the Optics Research Centre (CIOp) of La Plata city, Buenos Aires, Argentina. Her research is devoted principally to the study of the optical properties of metal nanoparticles synthesized by femtosecond pulse laser ablation of solid targets in liquids. Also, she has worked on sensing properties of plasmonic devices based on Kretschmann configuration. |
||||
 |
|
 |
ORGANIZING COMMITTEE: S. Ledesma . M. G. Capeluto . C. Iemmi . M. Larotonda . D. Skigin . H. Grecco SECRETARY: María Cambón |