
300 Biosensors Based on Nanomaterials and Nanodevices
dissociate on the surface. The undissociated species are then (C) desorbed while the
remaining carbon species can either (D) form a carbon lm on the surface of the particle,
(G) go into solution with the catalyst particle, or (H) diffuse through/around the particle
to become (I) incorporated into the growing graphene layer. The carbon lm that forms
on top of the catalyst particle inhibits any further carbon from incorporating into the
growing ber. This lm is removed by (E) chemical etching and (F) ion bombardment.
The underlying ber is protected to a large extent from these removal proce ...