The nanomaterial has four parts describing its structure, a core npo:NPO 1617, a coat npo:NPO 1376, a shell npo:NPO 760 and a surface npo:NPO 1379. The other important entity in describing a nanomaterial is a quality bfo:Quality which is an independent characteristic that retains its identity when it when exists within an entity, even though its states and relations may change. Each nanomaterial part has one or more qualities, such as, chemical decomposition npo:NPO 1344, core size enm:ENM 9000039, surface charge npo:NPO 1235 and surface are npo:NPO 1812. Moreover, the nanomaterial entity itself can link to qualities that are not specific to a part, like shape npo:NPO 274 and molecular weight npo:NPO 1171.