Functionalization of CNT Deposited on Various Metallic Substrates in Potassium Ferricyanide
Alison Sagliocca, Vassar College ’16, Cady Cirbes, Vassar College ’16 and Prof. Stuart BelliThis project focuses on the growth and functionalization of multi-walled carbon nanotubes (CNT). CNTs were grown via chemical vapor deposition (CVD) on nickel plates that were successively plated with gold then nickel. These plates were functionalized in potassium ferricyanide. The functionalization resulted in the deposition of Prussian blue (PB) and its oxidized state, Prussian white. The interaction between the CNTs and PB was investigated using cyclic voltammetry (CV), creating the electrode used for further analysis. CV was used to measure capacitance and current of the electrode in potassium ferricyanide, which showed that the nickel deposition was significant in the redox couple observed and that the surface area as well as nanotube density was proportional to the capacitance. Efficiency as a battery was measured by the electrode’s ability to light an LED for a maximum amount of time. Electrodes were also created through the sonication of CNTs in chloroform, nickel-plated gold wires and nickel silicide covered silicon wafers, which were less efficient as batteries than the growth on nickel plates.