Current research activities

  • Plasmonic heating. Nanoscale thermodynamics with nanoparticles.

    When illuminated at their plasmon resonance, metallic nanoparticles may convert very efficiently light into heat. We study the application of this optically controlled, nanometric heating to investigate thermodynamic processes locally at the nanometer scale.

  • Optical nano-antennas for single molecules.

    Metallic nanoparticles interact strongly with light via their size, composition and shape dependent plasmon resonances. We study the near field coupling of single molecules to metallic nanoparticles. In this manner, the nanoparticles act as optical nano-antennas enhancing the interaction of emitters (molecules, quantum dots) with radiation.

  • Laser printing single colloidal nanoparticles.

    By use of optical forces on colloidal nanoparticles we are able to immobilize individual nanoparticles, one by one, on precise locations of a substrate. We are improving this technique in order to fabricate functional nanocircuits with nanoparticles of various compositions and shapes.

  • Far-field optical nanoscopy.

    In collaboration with the Department of Nanobiophotonics, Prof. Dr. Stefan W. Hell, Max-Planck-Institute for biophysical Chemistry
    In recent years, several techniques of fluorescence microscopy that break the diffraction limit have been developed. These powerful methods provide images with spatial resolutions of a few tens of nanometers keeping the simplicity and noninvasive character of optical microscopy. Within the frame of a “Partner Group” collaboration financed by the Max Planck Society and the help of the group of Prof. Stefan Hell, we are working on establishing those techniques in our laboratory, and use them to investigate a number of biophysical questions, to explore new physical applications and to make them available to the argentine scientific community through the National Microscopy System.