title: Nanostructured colloidal crystals from forced hydrolysis methods.
abstract: In this work, an original route for ZnO nanostructured spherical colloids and their assembly into colloidal crystals are presented. The temporal evolution of crystal size and shape was followed by X-ray diffraction and the colloids size distribution by scanning electron microscopy. These spherical colloids showed a change in their size dispersion with aging time. Early stage suspensions, with a narrow size distribution, were settled to the bottom and dried with a slow evaporation rate to obtain colloidal crystals. This original route provides a new material for future applications in opalline photonic crystals, with a dielectric constant higher than that of classical materials (silica and latex). Moreover, this route means an improvement of previously reported data from the literature since it involves a one-pot strategy and room-temperature colloid assembly.
authors: CINSO, Centro de Investigaciones en Sólidos, CONICET, CITEFA, San Juan Bautista de La Salle 4397, (B1603ALO) Villa Martelli, Buenos Aires, Argentina. eotal@citefa.gov.ar
authors: Eugenio H
authors: EH
authors: Otal
authors: Mara
authors: M
authors: Granada
authors: Horacio E
authors: HE
authors: Troiani
authors: Horacio
authors: H
authors: Cánepa
authors: Noemí E
authors: NE
authors: Walsöe de Reca