I have been working on development of single molecule microscopy, time-correlated single photon counting and other microscopic techniques. I am using a home-built confocal scanning microscope equipped with a piezo-driven nanopositioning stage to monitor double hydrogen transfer in single molecules. I am also a coordinator of the project concerning evaluation of photo- and thermochromism in hydroxycoumarin-based compounds in collaboration with the Department of Chemistry in Tunghai University.