PIMSO 2025 - Science - Secondary 4 - National Round Question 16

Question 16

All of the following are nanomaterials except:

Editorial convention: graphite in A means ordinary bulk graphite, not a specially prepared nanoscale specimen.

Graphite, a material made of layers of graphene
Graphene, a one-atom thick allotrope of C that can extend to micrometer sizes
A micrometer-long rod that is 20 nm thick
Metallic particles of Ag with average diameter 12 nm