title: A molecular approach to Cu doped ZnO nanorods with tunable dopant content.
abstract: A novel molecular approach to the synthesis of polycrystalline Cu-doped ZnO rod-like nanostructures with variable concentrations of introduced copper ions in ZnO host matrix is presented. Spectroscopic (PLS, variable temperature XRD, XPS, ELNES, HERFD) and microscopic (HRTEM) analysis methods reveal the +II oxidation state of the lattice incorporated Cu ions. Photoluminescence spectra show a systematic narrowing (tuning) of the band gap depending on the amount of Cu(II) doping. The advantage of the template assembly of doped ZnO nanorods is that it offers general access to doped oxide structures under moderate thermal conditions. The doping content of the host structure can be individually tuned by the stoichiometric ratio of the molecular precursor complex of the host metal oxide and the molecular precursor complex of the dopant, Di-aquo-bis[2-(methoxyimino)-propanoato]zinc(II) 1 and -copper(II) 2. Moreover, these keto-dioximato complexes are accessible for a number of transition metal and lanthanide elements, thus allowing this synthetic approach to be expanded into a variety of doped 1D metal oxide structures.
authors.affiliation: Fachbereich Chemie, Eduard Zintl-Institut für Anorganische und Physikalische Chemie, Abteilung Anorganische Chemie I, Technische Universität Darmstadt, Petersenstr. 18, 64287, Darmstadt, Germany.
authors.forename: Mikhail
authors.initials: M
authors.lastname: Pashchanka
authors.forename: Rudolf C
authors.initials: RC
authors.lastname: Hoffmann
authors.forename: Aleksander
authors.initials: A
authors.lastname: Gurlo
authors.forename: Janine C
authors.initials: JC
authors.lastname: Swarbrick
authors.forename: Jayaprakash
authors.initials: J
authors.lastname: Khanderi
authors.forename: Jörg
authors.initials: J
authors.lastname: Engstler
authors.forename: Alexander
authors.initials: A
authors.lastname: Issanin
authors.forename: Jörg J
authors.initials: JJ
authors.lastname: Schneider