title: Synthesis of ZnO nanostructures for low temperature CO and UV sensing.
abstract: In this paper, synthesis and results of the low temperature sensing of carbon monoxide (CO) gas and room temperature UV sensors using one dimensional (1-D) ZnO nanostructures are presented. Comb-like structures, belts and rods, and needle-shaped nanobelts were synthesized by varying synthesis temperature using a vapor transport method. Needle-like ZnO nanobelts are unique as, according to our knowledge, there is no evidence of such morphology in previous literature. The structural, morphological and optical characterization was carried out using X-ray diffraction, scanning electron microscopy and diffused reflectance spectroscopy techniques. It was observed that the sensing response of comb-like structures for UV light was greater as compared to the other grown structures. Comb-like structure based gas sensors successfully detect CO at 75 &deg;C while other structures did not show any response.
authors.affiliation: Thin Films Technology Laboratory, Department of Physics, COMSATS Institute of Information Technology, Islamabad 44000, Pakistan. aminislamabad@yahoo.com
authors.forename: Muhammad
authors.initials: M
authors.lastname: Amin
authors.forename: Umair
authors.initials: U
authors.lastname: Manzoor
authors.forename: Mohammad
authors.initials: M
authors.lastname: Islam
authors.forename: Arshad Saleem
authors.initials: AS
authors.lastname: Bhatti
authors.forename: Nazar Abbas
authors.initials: NA
authors.lastname: Shah
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D002248:Carbon Monoxide / Q000032:analysis*; D003080:Cold Temperature; D004784:Environmental Monitoring / Q000295:instrumentation; D004867:Equipment Design; D055616:Microtechnology; D049329:Nanostructures / Q000737:chemistry; D014466:Ultraviolet Rays; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D002248:Carbon Monoxide; D015034:Zinc Oxide