Metal Oxide and Bimetallic Nanostructures on Planar Titania Surfaces

白色/得克萨斯州在分析和表面化学项目的支持下，奥斯汀得克萨斯大学的白色教授和他的同事正在研究纳米结构氧化物和纳米结构表面上的含氧小分子的光和热诱导化学。 使用一种新的疏水/亲水图案化方法，他们沉积纳米尺寸的钛和钼氧化物颗粒，以及Au/Cu纳米颗粒在平面TiO 2表面上。 扫描隧道显微镜，热脱附光谱，和X射线光电子能谱被用来检查这些结构化表面上的反应的动力学和机制。 从这一基础研究的信息是重要的发展的氧化物和纳米材料的纳米粒子的反应性的理解。纳米尺寸的材料的表面化学反应性可能是不同的，从散装氧化物和纳米材料的表面反应性的重要方式。 这个由德克萨斯大学的白色教授和他的小组进行的研究项目解决了这个重要的问题。 使用疏水/亲水图案化方法，钛和钼氧化物的纳米结构表面，以及Au/Cu纳米粒子的制备和表征。 然后使用标准的UHV表面化学探针检查这些材料的表面化学。 这一基本信息对于了解用于许多技术应用的纳米材料的反应性至关重要。

AbstractCHE-0412609White/TexasWith the support of the Analytical and Surface Chemistry Program, Professor White and his coworkers at the University of Texas at Austin are investigating the photo and thermal induced chemistry of small oxygen containing molecules on nanostructured oxide and bimetallic surfaces. Using a novel hydrophobic/hydrophilic patterning method, they are depositing nanometer sized titanium and molybdenum oxide particles, as well as Au/Cu bimetallic particles on planar TiO2 surfaces. Scanning tunneling microscopy, thermal desorption spectroscopy, and X-ray photoelectron spectroscopy are used to examine the kinetics and mechanisms of the reactions on these structured surfaces. Information from this fundamental research is important for developing an understanding of the reactivity of nanoparticles of oxide and bimetallic materials.The surface chemical reactivity of nanometer sized materials is likely to differ in important ways from the surface reactivity of bulk oxide and bimetallic materials. This research project, carried out by Professor White and his group at the University of Texas, addresses this important question. Using a hydrophobic/hydrophilic patterning method, nanostructured surfaces of titanium and molybdenum oxides, as well as Au/Cu bimetallic nanoparticles are prepared and characterized. The surface chemistry of these materials is then examined using standard UHV surface chemistry probes. This fundamental information is crucial for developing an understanding of the reactivity of nanomaterials for use in many technical applications.