Structural and electrochemical properties of gold-deposited carbon nanotube composites

Gold-decorated multi-walled carbon nanotubes were prepared by electrostatic interaction in solution states and they have been studied in detail with UV/Vis spectroscopy, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV). Gold nanoparticles and their composites showed the similar surface plasmon absorptions. XPS results were in good agreement with the composite morphologies of TEM images. HOMO/LUMO energies and the energy band gaps of MWNTs in their composites were analyzed by CV measurements.