Shape Evolution of Cu2O Nanostructures via Kinetic and Thermodynamic Controlled Growth

摘要: We report the shape evolution process of Cu2O nanocrystals upon slow oxidation Cu under ambient conditions, yielding novel hexagonal and triangular platelike morphologies. The obtained evolves from to octahedral; growth patterns are governed by kinetically thermodynamically controlled growth. Preferential adsorption I- on {111} planes nanoparticles induced selective crystal metastable structures with faces as basal planes. On aging, appeared shift into thermodynamic regime stable octahedral is obtained. possible mechanisms were investigated varying synthetic conditions. band gap nanooctahedrons was determined classical Tauc approach be 2.24 eV, which blue shifted respect bulk value (2.17 eV). Results suggest that use crystallographic surfacta...