Journal of Sol-Gel Science and Technology

, Volume 72, Issue 3, pp 655–662 | Cite as

Fe-lactate mediated formation of ZnO sols and self-organized nanorod assemblies

  • Claudia Aparicio
  • Jan Filip
  • Karolina Machalova-Siskova
  • Miroslav Mashlan
  • Lubomir Spanhel
Brief Communication

Abstract

Hot ethanolic mixtures of hydrated Zn(II)- and Fe(II)-carboxylates (acetate and lactate) react to form yellow-orange colored Fe(III)xZnyOzOHw heteroclusters showing pronounced electronic resonances in the optical UV absorption spectra. On the addition of LiOH to these polymolecular sols, stable nanoparticulate Fe(III)–ZnO colloids are formed. During colloidal growth, 2–4 nm sized weakly crystallized Wurtzite nanoparticles are exclusively formed even in the presence of high Fe content up to 20 at.%. The presence of Fe(III) in the ZnO condensation process retards the nanoparticle growth and blocks the thermal crystallization and size enhancement up to 250 °C. The produced 0.5 M Fe(III)–ZnO sols are useful for film formation processes. From atomic force microscopy-AFM, scanning electron microscopy-SEM and X-ray diffraction-XRD studies, we note important differences in shape and morphology of the thermally annealed Fe(III)–ZnO layers depending on the iron carboxylate employed. Surprisingly, Fe(II)-lactate derived coatings are carrying vertically oriented cone-shaped aggregates composed of 60–120 nm long primary nanorods. Contrary, Fe(II)-acetate based synthesis gave sand-dune like film morphologies containing spherical 12 nm sized nanocrystallites. All film samples possess mesoporosity with pore size ranging between 5 and 20 nm.

Keywords

Nanoparticles Nanorods ZnO Fe-doped ZnO Sol–gel coatings 

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Claudia Aparicio
    • 3
  • Jan Filip
    • 3
  • Karolina Machalova-Siskova
    • 3
  • Miroslav Mashlan
    • 3
  • Lubomir Spanhel
    • 1
    • 2
  1. 1.Institute of Chemical Sciences Rennes ISCR, UMR CNRS 6226University of Rennes 1RennesFrance
  2. 2.Faculty of Chemistry, Central European Institute of Technology CEITECMasaryk UniversityBrnoCzech Republic
  3. 3.Departments of Experimental Physics and Physical Chemistry, Faculty of Science, Regional Centre of Advanced Technologies and Materials RCATMPalacky UniversityOlomoucCzech Republic

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