Carbon nanospikes have better electrochemical properties than carbon nanotubes due to greater surface roughness and defect sites.

ABSTRACT: Carbon nanomaterials are used to improve electrodes for neurotransmitter detection, but what properties are important for maximizing those effects? In this work, we compare a newer form of graphene, carbon nanospikes (CNSs), with carbon nanotubes (CNTs) grown on wires and carbon fibers (CFs). CNS electrodes have a short, dense, defect-filled surface that produces remarkable electrochemical properties, much better than CNTs or CFs. The CNS surface roughness is 5.5 times greater than glassy carbon, while CNTs enhance roughness only 1.8-fold. D/G ratios are higher for CNS electrodes than CNT electrodes, an indication of more defect sites. For cyclic voltammetry of dopamine and ferricyanide, CNSs have both higher currents and smaller ΔE_p values than CNTs and CFs. CNS electrodes also

SUBMITTER: Cao Q 

PROVIDER: S-EPMC6777722 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature