Uniform arrays of ZnO 1D nanostructures grown on Al:ZnO seeds layers by hydrothermal method.
In obtaining uniform array of ZnO 1D nanostructures, especially using solution based methods, the thickness and the morphology of the epitaxial seeds layer are very important. The paper presents the effect of the thickness and the morphology of the Al:ZnO seeds layer on the morphology and properties of ZnO nanowires array grown by hydrothermal method. Compact and vertically aligned ZnO 1D nanostructures were obtained. Concentration of 0.02 M of zinc nitrate was found to be optimal for growing nanowires with diameters up to 50 nm and lengths between 1.5 and 2.5 microns. Using 0.04 M solution, nanorods with diameter between 50 and 100 nm were obtained. The correlation between the crystal structure and optical properties of ZnO nanowires is discussed. From electrical measurements on single nanowire, resistivity value of 9 x 10(-2) omega cm was obtained. The I-V curves of single ZnO NWs show quasi diode characteristic when an e-beam is irradiating the NWs, and a typical semiconductive behaviour when the e-beam is turned off.
Centre of Nanostructures and Functional Materials-CNMF, "Dunãrea de Jos" University of Galati, 111 Domneasca 800201, Galati, Romania.
Anca-I
AI
Danciu
Viorica
V
Musat
Tito
T
Busani
Joana V
JV
Pinto
Raquel
R
Barros
Ana Maria
AM
Rego
Ana Maria
AM
Ferraria
Patricia A
PA
Carvalho
Rodrigo
R
Martins
Elvira
E
Fortunato
D000535:Aluminum / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures; D015034:Zinc Oxide / Q000737:chemistry*
D000535:Aluminum; D015034:Zinc Oxide