Our group is involved in the characterization of nano-objects and in developing experimental methods for the detection and characterization of individual nano-objects.
Super resolution microscopy for the observation and chemical characterization of nano-objects and nanostructures. Special emphasis is made on label-free methods, avoiding the labeling of the objects with fluorescent dyes. The methods are well tailored for nano-material research. We are making use of photo-induces thermal profiling to enhance resolution. The improvement of resolution stems from the nonlinear response of the reflectivity.
Development of methods to measure light absorption and light extinction in individual nano-objects and nanoparticles. A major goal in using this methods is the the search for direct band gap photovoltaic materials. For instance, finding Ge/Si core multi-shells nanowires with enhanced photovoltaic yields in the infrared.