BLACK MATERIAL, BLACK PARTICLE DISPERSION LIQUID, BLACK LIGHT-BLOCKING FILM USING SAME, AND BASE WITH BLACK LIGHT-BLOCKING FILM

摘要

Disclosed is a black material which is characterized in that it is composed of secondary particles as agglomerates of primary particles which are made of a metal and/or a metal oxide and have a particle diameter of not less than 1 nm and not more than 200 nm, in that the secondary particles have a particle diameter of not less than 5 nm and not more than 300 nm, and in that the outermost layer of each secondary particle contains one or more elements selected from gold (Au), platinum (Pt), palladium (Pd), silver (Ag), ruthenium (Ru), copper (Cu), silicon (Si), titanium (Ti), tin (Sn) and nickel (Ni) or oxides thereof in an amount of not less than 50% by weight. Also disclosed is a black particle dispersion liquid characterized by containing the black material and a polymer dispersant. Further disclosed is a black particle characterized in that the surface of the black material is covered with an insulating film which is composed of an organic polymer compound.