A kind of uniform NdOHCO₃ nanodisks, with an average diameter about of 200～300 nm and outstanding thickness in range of 50～100 nm was fabricated via a template-free hydrothermal method, utilizing Nd₂O₃ and glycine as reagents. Various experimental conditions, such as the reaction temperature, time, the molar ratios of the starting reagents and the influence of surfactants, were studied. The possible growth mechanism was proposed. In addition, by means of extending reaction time or adding another surfactant polyvinylpyrrolidone (k-30) in the reaction system, novel 3D nano-superstructures could be formed by these nanodisks assembled. After proper heat treatment, as-obtained NdOHCO₃ nanodisks could in situ turn into Nd₂O₃ with similar morphology, which provided a simple, effective approach to prepare special structure and morphology Nd₂O₃. The photoluminescence spectra of the products indicated the NdOHCO₃ nanodisks and their self-assembly architectures have intensive and broad band centered at around 450 nm, which are possibly associated with these special morphologies.

Key words: hydrothermal fabrication, NdOHCO₃, nanodisks, self-assembly, photoluminescence property