Deposition and characterization of IrO_x nanofoils on carbon nanotube templates by reactive magnetron sputtering

摘要

Large surface area IrO_x nanofoils (IrO_xNF) were deposited on multi-wall carbon nanotube (MWCNT) templates, forming IrO_x/MWCNT nanocomposites, by reactive radio frequency magnetron sputtering using Ir metal target The structural and spectroscopic properties of IrO_xNF were characterized. The micrographs of field emission scanning electron microscopy showed the formation of foil-like structure for the as-deposited samples. Trans mission electron microscopy analysis revealed the contiguous presence of glassy tridium O_xide, indium metal, and indium diO_xide nanocrystals in the foil. X-ray photoelectron spectroscopy analysis provided the information of the O_xidation states and the stoichiometry of IrO_xNF. Raman spectra revealed the amorphous-like phase of the as-deposited IrO_xNF. The nanofoil structure provided ultra-high surface area for electrical charge storage which made the lrO_x/MWCNT nanocomposites as an attractive candidate for the supercapacitor applications.