Catalytic effect of surface on PE MOCVD-synthesis of germanium nanotubes
Quantum chemical calculations of the coordination compound of Ge(IV) with Hhfa by PM3 have been carried out. The only stable compound has been found to be a complex with composition Ge(hfa) <sub>2</sub>(OH) <sub>2</sub>. Porous substrates based on anodic alumina (pore d ~70–150 nm) were synthesized with following deposition of Au nanoclusters (d ~ 5–10 nm)on their surface. It has been shown that using of templates based on Al/Al <sub>2</sub>O <sub>3</sub>/Au promotes the formation of germanium nanotubes due to the adsorption-desorption of germanium atoms by surface of Au nanoclusters (VLS-mechanism). PE MOCVD-synthesis (120°C) of germanium nanotubes of different diameters (~70–180 nm) and shape (homogeneous and curved) using a volatile complex Ge(hfa) <sub>2</sub>(OH) <sub>2</sub> was carried out.