Functional Nanomaterials Group

Using different types of metal oxide nanosheets, we revealed that sheet-specific properties, including thickness, charge density, solid acidity, and adsorption characteristics, influence the ionic strength and Debye length of deionized suspensions, ultimately determining their structural coloration behavior. These findings significantly deepen our understanding of the mechanisms governing macroscopic ordering and liquid-crystal formation in nanosheet dispersions, paving the way for the development of multicolor, dynamically tunable optical devices with stimulus-responsive functionalities for a wide range of applications.