title: Nanostructures of crystalline molybdenum trioxide grown by condensation in a carrier gas.
abstract: Molybdenum trioxide nanostructures were grown by direct evaporation of MoO3 from a tungsten boat resistively heated in the presence of hydrogen or helium as carrier gas at pressures from 100 to 600 Pa. Crystalline structures such as, nanoribbons, nanofibers, nanoneedles and nanoparticles were obtained at source temperatures below 900 degrees C. On the other hand, at source temperatures above 1000 degrees C, nanoporous structures were obtained. The latter were found more often when hydrogen was used as carrier gas.
authors.affiliation: Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Av. Almirante Blanco Encalada 2008, 837-0449-Santiago, Chile.
authors.forename: D E
authors.initials: DE
authors.lastname: Diaz-Droguett
authors.forename: V M
authors.initials: VM
authors.lastname: Fuenzalida
authors.forename: G
authors.initials: G
authors.lastname: Solorzano
mesh_terms: D003460:Crystallization / Q000379:methods*; D005740:Gases / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D008982:Molybdenum / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D016062:Porosity; D013499:Surface Properties
chemical_list: D005740:Gases; D046911:Macromolecular Substances; D010087:Oxides; C082290:molybdenum trioxide; D008982:Molybdenum