Our unit challenges to develop novel organic materials based on basic concepts of synthetic organic and supramolecular chemistries. In particular, we are mainly trying to selectively syn-thesize kinetic products by controlling self-assemblies of molecules.
Actuator driven by fluctuations in environmental humidity
We have developed a film that curls up and straightens out autonomously when exposed to tiny, barely measurable changes in ambient humidity. When irradiated with ultraviolet light, which causes changes in the film’s ability to absorb and desorb water, it can even “jump” into the air. In the same way that a mechanical watch takes advantage of the natural movements of the wrist to gain energy, this film takes tiny fluctuations in the ambient humidity and transforms them into mechanical energy. This type of device will be useful for creating a sustainable society.
Photos and schematic illustration of jumping of the film with photo-irradiation
Breaking symmetry leads to responsive organic photodetectors
