Surface Phase Diagrams Jian Luo, Clemson University, DMR 0448879 - PowerPoint PPT Presentation

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Surface Phase Diagrams Jian Luo, Clemson University, DMR 0448879

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  1. Surface Phase DiagramsJian Luo, Clemson University, DMR 0448879 Via the support of a CAREER award, researchers in South Carolina have investigated a unique class of surface films that form spontaneously with a self-selecting thickness on the order of one nanometer. These surface films can be treated as a “surface phase”, which exhibits thermodynamic stability that defers from any bulk phases. For example, nanoscale quasi-liquid surface films can form at thermodynamic equilibration well below the bulk solidus line where the corresponding bulk liquid phase is no longer stable; an example is shown in the figure. Consequently, surface phase diagrams are constructed. This study enriched the fundamental surface science and suggested many potential applications. A Surface Phase Diagram: A nanometer-thick, Bi2O3-based, liquid-like, “surface phase” forms spontaneously on ZnO(11-20) surfaces, and its thermodynamic stability differs substantially from that of a bulk liquid phase. Line of constant film thicknesses are plotted in the binary phase diagram.

  2. Online Mini-Courses in Materials ScienceJian Luo, Clemson University, DMR 0448879 Via the support of a CAREER project, a professor at Clemson University in South Carolina has developed a series of Web-based materials science and engineering mini-courses, entitled "A Series of Open Mini-Courses in Materials Science and Engineering – Free and Open Educational Recourse for Self-Learners around the World". Fourteen mini-courses have been developed. Each is designed to be a brief overview of one selected subject that a self-learner with appropriate background can master in 1-2 days. With an industry background, he is interested in helping engineers in industry who want to learn basic materials science knowledge, but do not have the time and opportunity to take a regular class. Please review these mini-courses at: http://people.clemson.edu/~jianluo/education/ An education Website developed via the support of a CAREER award