title: Growth and Properties of Cl- Incorporated ZnO Nanofilms Grown by Ultrasonic Spray-Assisted Chemical Vapor Deposition.
abstract: Pure and Cl- incorporated ZnO nanofilms were grown by the ultrasonic spray-assisted chemical vapor deposition (CVD) method. The properties of the nanofilms were investigated. The effects of growth temperature and Cl- concentration on the crystal structure, morphology, and optical properties of the nanofilms were studied. Temperature plays an important role in the growth mode and morphology of the pure nanofilms. Preferential growth along the c-axis occurs only at modulating temperature. Lower temperature suppresses the preferential growth, and higher temperature suppresses the growth of the nanofilms. The morphologies of the nanofilms change from lamellar and spherical structures into hexagonal platelets, then into separated nanoparticles with an increase in the temperature. Incorporating Cl- results in the lattice contracting gradually along with c-axis. Grains composing the nanofilms refine, and the optical gap broadens with increasing of Cl- concentration in growth precursor. Incorporating Cl- could reduce oxygen vacancies and passivate the non-irradiated centers, thus enhancing the UV emission and suppressing the visible emission of ZnO nanofilms.
authors.forename: Tingfang
authors.initials: T
authors.lastname: Chen
authors.forename: Aiji
authors.initials: A
authors.lastname: Wang
authors.forename: Lingrui
authors.initials: L
authors.lastname: Kong
authors.forename: Yongliang
authors.initials: Y
authors.lastname: Li
authors.forename: Yinshu
authors.initials: Y
authors.lastname: Wang
mesh_terms: D002713:Chlorine / Q000737:chemistry* / Q000528:radiation effects; D003460:Crystallization / Q000379:methods; D005740:Gases / Q000737:chemistry* / Q000528:radiation effects; D019220:High-Energy Shock Waves; D008422:Materials Testing; D008567:Membranes, Artificial; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D010316:Particle Size; D013010:Sonication / Q000379:methods*; D015034:Zinc Oxide / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D005740:Gases; D008567:Membranes, Artificial; D002713:Chlorine; D015034:Zinc Oxide