Hybrid Chemical Vapor Deposition/Sol−Gel Route in the Preparation of Nanophasic LaCoO3 Films
Hybrid Chemical Vapor Deposition/Sol−Gel Route in the Preparation of Nanophasic LaCoO3 Films
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DOI：
10.1021/cm0489643
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发表时间：
2005
影响因子：
8.6
通讯作者：
L. Armelao;D. Barreca;G. Bottaro;A. Gasparotto;C. Maragno;E. Tondello
中科院分区：
文献类型：
--
作者：
L. Armelao;D. Barreca;G. Bottaro;A. Gasparotto;C. Maragno;E. Tondello
钴酸镧（LaCoO3）薄膜是通过化学气相沉积（CVD）和溶胶凝胶（SG）方法相结合的创新路线合成的。特别是，该方法基于二元氧化物系统（Co−O on La−O）的顺序沉积和最终产品的异位热处理（T = 400−900 °C，t = 1−8 h），旨在有利于固态反应以形成三元 La−Co−O 纳米系统。为了突出这些程序对最终产品特性的特殊影响，SG 和 CVD 路线均用于制备单相 La−O 和 Co−O 物质。该过程形成了平均晶粒尺寸低于 20 nm 的 LaCoO3 纳米结构薄膜。所需的加工条件很大程度上取决于具体的合成途径：（i）CVD La−O 上的 Co−O SG； (ii) SG La−O 上的 Co−O 的 CVD。在此框架中，特别关注两个序列之间的相似性和差异...
Lanthanum cobaltite (LaCoO3) thin films were synthesized by an innovative route based on the combination of chemical vapor deposition (CVD) and sol−gel (SG) methods. In particular, the approach is based on the sequential deposition of binary oxide systems (Co−O on La−O) and on the ex situ thermal treatment of the final product (T = 400−900 °C, t = 1−8 h), aimed at favoring solid-state reactions for the formation of a ternary La−Co−O nanosystem. To highlight the peculiar effects of these procedures on the characteristics of the final product, both SG and CVD routes were used for the preparation of single-phase La−O and Co−O species. The process resulted in the formation of LaCoO3 nanostructured films with an average crystallite size lower than 20 nm. The required processing conditions were strongly dependent on the specific synthetic pathway: (i) SG of Co−O on CVD La−O; (ii) CVD of Co−O on SG La−O. In this framework, particular attention was focused on the analogies and differences between the two sequenc...