I like just about all types of nanoscience, but my greatest interest is in the synthesis and application of carbon nanostructures. It just fascinates me the different shapes that they can make and the potential applications of the shapes. In my mind, carbon nanotubes are just the tip of the iceberg when it comes to useful carbon nanostructures.
Amont all the nanomaterials, I'm most interested in fullerene. Fullerenes and their derivatives are used as electron acceptor materials in the design of solar cells. For example, fullerenes are excellent electron acceptor materials for polymer solar cells due to their unique three-dimensional conjugated structure. I wonder if fullerenes will be used in the actual application in the future.