Title：Synthesis and characterization of metal-oxide films by a solution approach

Date：June 19, 2008
    
By：Dr. Quanxi Jia (Los Alamos National Laboratory, USA)

    Abstract:In the last several years, metal-oxides have become the basis for many revolutionary electronic devices because they exhibit a wide range of electronic properties. Metal-oxide films can be grown by physical vapor deposition, chemical vapor deposition, and chemical solution deposition techniques. One of the challenges in solution-based processes of complex functional metal-oxide films has been to produce high quality films and at the same time to control the stoichiometry. In this talk, I will discuss our new solution route, polymer-assisted deposition (PAD), for the deposition of thin film electronic materials. This innovative technique uses aqueous solutions in which metals are bound to water soluble polymers. The solution can be then applied to any type of surface in a variety of ways including spin coating, spray coating or dip coating. Thermal treatment removes both water and polymer at as low as 450 °C. Further post-annealing yields high quality and crack-free films. We have made a wide range of stable solutions. Stoichiometry of complex compounds is readily controlled by simply mixing solutions. The successful growth of both simple and complex epitaxial films with desired properties by PAD suggests that PAD is a feasible alternative approach to the growth of high quality electronic materials.

    About Dr. Quanxi Jia：Since 1996, Dr. Quanxi Jia has been the team leader in electronic material & devices in LANL. In September of 2003, he became laboratory fellow in LANL. At present, his research interests focus on the following areas: 1.synthesis and structure-property relationships of nanostructured materials, multifunctional materials, thin films and multilayer systems. In particular, the growth of nanocomposite and multilayer metal-oxide thin films, the mechanism of film growth, optical/electrical properties of the films, and device applications of the films.2. Novel deposition techniques for the growth of electronic materials with controlled structural and transport properties.3. Development and fabrication of high-temperature superconducting films for coated conductors and devices.4.Development and fabrication of novel solid-state microelectronic/electro-optic devices. He has more than 30 funded projects, 29 US patents issued and 23 US patents pending, and more than 300 peer reviewed journal articles.