title: Local Structure of ZnO micro flowers and nanoparticles obtained by micro-segmented flow synthesis.
abstract: The micro-segmented flow technique was applied for continuous synthesis of ZnO micro- and nanoparticles with short residence times of 9.4 s and 21.4 s, respectively. The obtained particles were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Small angle X-ray scattering (SAXS) and photoluminescence spectroscopy were used to determine the size and optical properties of ZnO nanoparticles. In addition, extended X-ray absorption fine structure (EXAFS) spectroscopy was employed to investigate local structural properties. The EXAFS measurements reveal a larger degree of structural disorder in the nanoparticles than the microparticles. These structural changes should be taken into consideration while evaluating the size-dependent visible emission of ZnO nanoparticles.
authors.affiliation: Department of Physical Chemistry and Micro Reaction Technology, Ilmenau University of Technology, Ilmenau, Germany. shuning.li@tu-ilmenau.de
authors.forename: Shuning
authors.initials: S
authors.lastname: Li
authors.forename: Amitava
authors.initials: A
authors.lastname: Roy
authors.forename: Henning
authors.initials: H
authors.lastname: Lichtenberg
authors.forename: Gregory
authors.initials: G
authors.lastname: Merchan
authors.forename: Challa S S R
authors.initials: CS
authors.lastname: Kumar
authors.forename: J Michael
authors.initials: JM
authors.lastname: Köhler