Synthesis of single-crystal β-Ni(OH)2 nanodisks and α-Fe2O3 nanocrystals in C2H5OH-NaOH-NH3⋠H2O system

Circular β-Ni(OH)2 nanodisks and rhombohedral and hexagonal α-Fe2O3 nanocrystals were prepared using the C2H5OH-NaOH-NH3⋅H2O system under hydrothermal conditions. The C2H5OH/H2O solvent is an appropriate one for the growth of these two materials with their thermodynamically favored morphologies and the possible formation mechanisms are discussed.