title: The effect of solvent on the morphology of ZnO nanostructure assembly by dielectrophoresis and its device applications.
abstract: Different zinc oxide nanostructured morphologies were grown on photolithographically patterned silicon/silicon dioxide substrates by dielectrophoresis technique using different solvents, such as water and ethanol, obtaining rod-like and net-like nanostructures, respectively. The formation of continuous nanostructures was confirmed by scanning electron microscopic, atomic force microscopic images, and electrical characterizations. The rod-like zinc oxide nanostructures were observed in the 10 μm gap between the fingers in the pattern, whereas net-like nanostructures were formed independently of microgap. A qualitative study about the mechanism for the assembly of zinc oxide continuous nanostructures was presented. Devices were electrically characterized, at room temperature, in controlled environment to measure the conductance behavior in ultraviolet and humidity environment. Devices based on zinc oxide nanostructures grown in ethanol medium show better responses under both ultraviolet and humidity, because of the net-like structure with high surface-to-volume ratio.
authors: ENEA Research Centre, Portici, Italy. vera.laferrara@enea.it
authors: Vera
authors: V
authors: La Ferrara
authors: Aneesh
authors: A
authors: Pacheri Madathil
authors: Anna
authors: A
authors: De Girolamo Del Mauro
authors: Ettore
authors: E
authors: Massera
authors: Tiziana
authors: T
authors: Polichetti
authors: Gabriella
authors: G
authors: Rametta
mesh_terms: D004586:Electrophoresis / Q000379:methods*; D000431:Ethanol / Q000737:chemistry; D006813:Humidity; D018625:Microscopy, Atomic Force; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D012825:Silicon / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D014466:Ultraviolet Rays; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D012997:Solvents; D000431:Ethanol; D012822:Silicon Dioxide; D015034:Zinc Oxide; D012825:Silicon