FINE PARTICLE-CAPTURING MEMBER, FINE PARTICLE-CAPTURING DEVICE, TESTING PIECE, AND MANUFACTURING METHOD OF FINE PARTICLE-CAPTURING MEMBER

摘要

PROBLEM TO BE SOLVED: To provide a simple structure which can effectively remove fine particles.SOLUTION: A fine particle-capturing member 10 for capturing fine particles 20 in an aqueous solution includes a substrate 11 composed of a material having a potential with the same sign as that of the surface potential of fine particles 20 in the aqueous solution, and recesses 12 formed in the surface of the substrate 11 for capturing fine particles 20. The recesses 12 have a depth Y deeper than the average diameter dof the fine particles 20 to be captured, and a width X is two times or more of the average diameter dof the fine particles 20.