| Popis: |
The stepwise self-assembly of europium sesquioxide nanocrystals into larger, anisotropic europium hydroxychloride nanostructures is observed. This involves the thermally assisted growth of 4.0 nm nanocrystals into elongated structures, called nanoneedles, and the subsequent assembly of those nanoneedles into larger, oriented bundles, called nanospindles. High-resolution transmission electron microscopy provides the size distribution, shape and atomic spacing of the nanostructures, whereas selective area electron diffraction and x-ray diffraction measurements identify their crystallinity. The optical properties, attributed to the environment of the host lattice for the europium ions, are investigated through photoluminescence measurements. |
