title: Mechanistic aspects of molecular formation and crystallization of zinc oxide nanoparticles in benzyl alcohol.
abstract: Zinc oxide nanostructures are known to exist in a great variety of morphologies. However, the underlying mechanisms leading to these architectures are far from being fully understood. Here, we present a time dependent study of the generation of zinc oxide nanorods, which arrange into bundles with a fan- or bouquet-like structure, using the benzyl alcohol route. The structural evolution of the nanoparticles was monitored by electron microscopy techniques, whereas the progress of the chemical reaction was followed by quantification of the organic by-products using gas chromatography. With this study we give a detailed insight into the formation of the zinc oxide structures, which involves a complex pathway based on many in parallel occurring processes such as crystallization of primary particles, their oriented attachment and surface reconstruction inside the nanoparticulate agglomerates. However, in spite of such an intricate growth behavior, the ZnO nanostructures are surprisingly uniform in size and shape.
authors.affiliation: Laboratory of Multifunctional Materials, Department of Materials, ETH Zurich, Wolfgang-Pauli-Strasse 10, 8093 Zurich, Switzerland.
authors.forename: Bettina
authors.initials: B
authors.lastname: Ludi
authors.forename: Martin J
authors.initials: MJ
authors.lastname: Süess
authors.forename: Irmgard A
authors.initials: IA
authors.lastname: Werner
authors.forename: Markus
authors.initials: M
authors.lastname: Niederberger
mesh_terms: D019905:Benzyl Alcohol / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013499:Surface Properties; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D046911:Macromolecular Substances; D019905:Benzyl Alcohol; D015034:Zinc Oxide