STRUCTURE AND COLLECTION DEVICE

摘要

A structure is provided with: a porous body that has a plurality of through-holes; and a plurality of projections that protrude in at least one of the thickness directions of the porous body from the portion where the through-holes of the porous body are not disposed, wherein the projections have a tip section that is different from the through-holes in a planar view seen from the thickness direction of the through-holes.