Electrochemical Characterization of Vertically Aligned Carbon Nanofiber Arrays Prepared by Hole-mask Colloidal Lithography

Nanoelectrode arrays consisting of vertically aligned carbon nanofibers were prepared through plasma enhanced chemical vapor deposition and patterned using hole-mask colloidal lithography (HCL), a simple fabrication method employed as a cost-effective patterning alternative to the conventional electron beam lithography. The density of the carbon nanofibers was easily altered by changing the concentration of the polystyrene spheres employed in HCL. Cyclic voltammetry and chronoamperometry were used to electrochemically characterize the arrays of different density. Results indicate that the density of the carbon nanofibers leads to differences in the macro/micro electroactive surface areas.