The present application provides an input member and an electrical device that includes the input member in which a slide operation can be performed, and in which a predetermined input value for each position touched by a user can be entered. Engineered surface-coated cerium oxide nanoparticles with different surface charges that are positive, negative and neutral provide therapeutic results for normal and cancer cell lines. The intermediate core includes sublayers thermoplastically fused together to form an aggregated intermediate core layer having overall characteristics formed as a combination of the sublayer characteristics.