title: Mesoporous single-crystal ZnO nanobelts: supported preparation and patterning.
abstract: We demonstrate that highly porous ZnO nanobelts can be prepared by thermally decomposing ZnS(en)(0.5) hybrid nanobelts (NBs) synthesized through a solvothermal route using Zn layers deposited on alumina substrates as both the Zn substrate and source. Hybrid decomposition by thermal annealing at 400 °C gives porous ZnS NBs that are transformed by further annealing at 600 °C into wurtzite single crystal ZnO nanobelts with an axial direction of [0001]. The evolution of the morphological and structural transformation ZnS(en)(0.5)→ ZnS → ZnO is investigated at the nanoscale by transmission and scanning electron microscopy analyses. Control of the ZnO NB distributions by patterning the Zn metallization on alumina is achieved as a consequence of the parent hybrid NB patterned growth. The presence of NBs on alumina in a ∼100 μm wide region between Zn stripes allows us to fabricate two contact devices where contact pads are electrically connected through a porous ZnO NB entanglement. Such devices are suitable for employment in photodetectors as well as in gas and humidity sensors.
authors.affiliation: IMEM-CNR, Parco Area delle Scienze 37/A, 43124 Parma, Italy.
authors.forename: Lucia
authors.initials: L
authors.lastname: Nasi
authors.forename: Davide
authors.initials: D
authors.lastname: Calestani
authors.forename: Filippo
authors.initials: F
authors.lastname: Fabbri
authors.forename: Patrizia
authors.initials: P
authors.lastname: Ferro
authors.forename: Tullo
authors.initials: T
authors.lastname: Besagni
authors.forename: Paolo
authors.initials: P
authors.lastname: Fedeli
authors.forename: Francesca
authors.initials: F
authors.lastname: Licci
authors.forename: Roberto
authors.initials: R
authors.lastname: Mosca
mesh_terms: D003460:Crystallization / Q000379:methods*; D006358:Hot Temperature; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D016062:Porosity; D012997:Solvents / Q000737:chemistry; D013499:Surface Properties; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D046911:Macromolecular Substances; D012997:Solvents; D015034:Zinc Oxide