Classes of nanomaterials

Engineered nanomaterials:

Manufactured materials with engineered structure between approximately 1 nm and 100 nm.

Incidental nanomaterials:

Materials with a structure between approximately 1 nm and 100 nm that are produced as a by-product of a process. For instance, welding fume and diesel emission particulates would be considered incidental nanomaterials.

Natural nanomaterials:

Materials with a structure between approximately 1 nm and 100 nm that are a result of natural processes. Some particles arising from volcanic emissions, sea spray, and atmospheric gas-to-particle conversion would be considered natural nanomaterials.

Generic:

Research that is applicable to the EH&S implications of all nanomaterials, irrespective of class.