Assembly of Lamellar Materials from Nanoscale and Molecular Building Blocks

授予宾夕法尼亚州立大学的这一奖项是对先前奖项的延续，并得到了化学部的先进材料和加工计划以及材料研究部的固态化学计划的支持。在这个项目中，Thomas Mallouk将研究在不同的反应条件下，通过逐层生长和剥离的方法，基于溶液形成粘结的钙钛矿薄膜和纳米管。利用片状固体的化学脱水和还原反应制备具有三维外延有序性的三维粘结钙钛矿。这些由过渡金属氧化物组成的超分子组件将被评估其离子、电子、巨磁电阻和铁电性质。该研究项目还将为学生提供材料化学方面的教育和培训机会。根据该奖项，将从金属氧化物中制备尺寸、形状和组成确定的三维薄膜和纳米管，以用于分子电子、纳米机器和相关应用。利用湿化学方法合成这些超分子组装体，一旦完全发展起来，可能会为化学气相沉积和激光烧蚀等传统方法提供另一种经济有效的方法。此外，该研究计划还将为学生提供材料化学方面的教育和培训机会。

This award to Pennsylvania State University is a renewal of an earlier one, and is supported by the Advanced Materials and Processing Program in the Chemistry Division and the Solid State Chemistry Program in the Materials Research Division. In this project, Thomas Mallouk will study a solution-based formation of bonded perovskite thin films and nanocrystalline tubes by layer-by-layer growth and exfoliation at different reaction conditions. Topochemical dehydration and reduction reactions of the lamellar solids will be used to prepare three-dimensional bonded perovskites with three-dimensional epitaxial ordering. These supermolecular assemblies from transition metal oxides will be evaluated for ionic, electronic, colossal magnetoresistance and ferroelectric properties. The research program will also provide education and training opportunity in materials chemistry to students.Under the award, three-dimensional thins films and nanotubes with defined size, shape and composition will be prepared from metal oxides for potential applications in molecular electronics, nanoscale machines and related applications. Synthesis of these supermolecular assemblies using wet chemistry methods, once fully developed, may provide alternate cost-effective methods to the traditional procedures such as chemical vapor deposition and laser ablation. In addition, the research program will provide education and training opportunity in materials chemistry to students.