Effect of cobalt doping and annealing on properties of titania thin films prepared by sol–gel process

Electron beam induced growth of silver nanowhiskers

“…2a). The sample annealed at 400 1C showed low intensity and a broad band at 144 cm À 1 corresponding to Eg Raman mode of TiO 2 anatase phase [30]. For the samples annealed at 500 1C and 600 1C peaks were observed at 144 (Eg), 197 (Eg), 399 (Eg) and 639 (Eg) cm À 1 , which correspond to anatase phase of TiO 2 .…”

Heat treatment and substrate dependant properties of titania thin films with high copper loading

“…Contrary to Ni‐ and Co‐doped titania , where nickel‐ and cobalt‐containing compounds segregated to the surface of the films during annealing, further annealing of copper‐doped titania films to 900 °C leads to disappearance of the dopant from the surface region (Fig. ).…”

“…The procedure was repeated until the last sample was removed from the furnace after a 1‐h annealing at 900 °C. A similar sol–gel method and annealing procedure has been utilized previously by us to prepare undoped and cobalt‐doped titania films on SiO 2 /Si(100) and nickel‐doped titania on HF‐etched Si(100) and SiO 2 /Si(100) substrate .…”

“…It is proposed that initial Cu 2+ is reduced by photogenerated electrons or OH radicals in the precursor . Another interesting question is whether copper segregates during annealing out of the titania matrix as observed previously in case of nickel and cobalt . Photocatalytic reactions occur on the surface and therefore the behaviour of copper atoms on the surface is especially important.…”

Photocatalytic antibacterial activity of nano-TiO2 (anatase)-based thin films: Effects on Escherichia coli cells and fatty acids

“…Antibacterial applications of TiO 2 often use thin film coatings that can be deposited by various methods including sputtering [17], chemical solution deposition [18], pulsed laser deposition [19] or sol-gel method [20][21][22][23].…”