Thin films of cobalt oxides obtained by vacuum co-deposition of Co and TeO2

被引：7
作者：
Kitova, S [1 ]
Rashkova, V [1 ]
Konstantinov, I [1 ]
机构：
[1] Bulgarian Acad Sci, Acad J Malinowski, Cent Lab Photoproc, BU-1113 Sofia, Bulgaria
来源：
VACUUM | 2002年 / 69卷 / 1-3期
关键词：
cobalt oxides; thin films; vacuum deposition; thermal effects;
D O I：
10.1016/S0042-207X(02)00366-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The composition and structure of thin films obtained by vacuum co-deposition of Co and TeO2 in an atomic ratio R-Co/Te = 1.5 are studied. It is shown that during the co-deposition a chemical reaction between both substances takes place resulting in the formation of amorphous CoO phase and elemental Te, very finely dispersed in the amorphous matrix. The reaction in as-deposited films proceeds until the complete oxidation of Co to Co2+. It is found that the crystalline phases of CoO, Co3O4 and/or Te are formed upon thermal heating of the films above 300degreesC. In this case, the reaction proceeds until complete consumption of TeO2 via the oxidation of Co2+ to higher valence and the formation of mixed oxides. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：405 / 409
页数：5
相关论文
共 9 条
  • [1] Unexpected differences in the surface electronic structure of NiO and CoO observed by STM and explained by first-principles theory
    Castell, MR
    Dudarev, SL
    Briggs, GAD
    Sutton, AP
    [J]. PHYSICAL REVIEW B, 1999, 59 (11): : 7342 - 7345
  • [2] An amperometric aqueous ethanol sensor based on the electrocatalytic oxidation at a cobalt-nickel oxide electrode
    Hayes, ET
    Bellingham, BK
    Mark, HB
    Galal, A
    [J]. ELECTROCHIMICA ACTA, 1996, 41 (02) : 337 - 344
  • [3] Pressure dependence of the morphology and size of cobalt (II,III) oxide nanoparticles prepared by pulsed-laser ablation
    Li, Q
    Sasaki, T
    Koshizaki, N
    [J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1999, 69 (01): : 115 - 118
  • [4] Electrochromic properties of cobalt oxide thin films prepared by chemical vapor deposition
    Maruyama, T
    Arai, S
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (04) : 1383 - 1386
  • [5] Determination of the emission characteristics of evaporation sources and of the thickness and composition of mixed layers
    Podolesheva, I
    Gushterova, P
    Platikanova, V
    Konstantinov, I
    [J]. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 1998, 16 (02): : 674 - 678
  • [6] Thermally induced processes in thin layers, obtained by coevaporation of TeO2 and Sn
    Podolesheva, I
    Platikanova, V
    Konstantinov, I
    Dimov, V
    Tarassov, M
    [J]. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1998, 16 (04): : 2608 - 2613
  • [7] MICROSTRUCTURE EVOLUTION OF CO PARTICLES SUPPORTED ON CARBON INDUCED BY OXIDATION-REDUCTION TREATMENT
    POTOCZNAPETRU, D
    KRAJCZYK, L
    [J]. JOURNAL OF MATERIALS SCIENCE LETTERS, 1995, 14 (18) : 1294 - 1297
  • [8] THIN-FILMS OF CO3O4 AND NICO2O4 PREPARED BY THE METHOD OF CHEMICAL SPRAY PYROLYSIS FOR ELECTROCATALYSIS .4. THE ELECTROCATALYSIS OF OXYGEN REDUCTION
    SINGH, RN
    KOENIG, JF
    POILLERAT, G
    CHARTIER, P
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1991, 314 (1-2) : 241 - 257
  • [9] Transition metal oxide films prepared by pulsed laser deposition for atomic beam detection
    Tanaka, M
    Mukai, M
    Fujimori, Y
    Kondoh, M
    Tasaka, Y
    Baba, H
    Usami, S
    [J]. THIN SOLID FILMS, 1996, 281 (281-282) : 453 - 456
1