Dumbbell Nanocomposites: Controlled Chemical Synthesis and Catalytic Applications

哑铃纳米复合材料：受控化学合成和催化应用

• 批准号: 0606264
• 负责人: Shouheng Sun
• 金额: $ 30万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-06-01 至 2009-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0606264&HistoricalAwards=false
• 关键词: Dumbbell; Nanocomposites; Controlled; Chemical; Synthesis

Technical AbstractThis project aims to develop novel composite nanomaterials with a structure similar to the dumbbell that has two different functional nanoparticle units with one being magnetic ferrite (MFe2O4), iron, cobalt, nickel, iron-nickel, or cobalt-iron, and the other metallic gold, silver, platinum, or palladium. These two functional units are physically linked by epitaxial growth of one crystal on another. The epitaxial linkage between two particles can be considered as a nanoscale junction, and electrons in one nanoparticle are capable of transferring across the interface to another nanoparticle. This junction effect can modify the electronic structure of both particles in the dumbbell structure, leading to novel physical and chemical properties that do not exist in the single component nanoparticles. The synthetic control in size, shape and interconnection of the composite nanostructures, achieved in this proposal, will allow the fine tuning of the junction effect in the dumbbell structures, facilitating the rational design and synthesis of advanced composite nanomaterials with optimum properties for catalytic applications.Non-technical AbstractThe proposed research represents a new direction in the study of solid-state composite nanostructures. It will provide new contents for both Solid State Chemistry and Nanoscale Materials: Synthesis and Applications, two courses the PI has been teaching in Browns undergraduate and graduate classes. The composite nanostructure and the rational approach to it will further enrich the Nanoscience and Nanotechnologyeducation programs in Browns Chemistry, Physics, Engineering and Life ScienceDepartments. The proposed research will contribute an essential part to the education ofScience and Engineering students to meet tomorrows challenge in Nanoscience andNanotechnology. Timely dissemination of the research results will be to theScience/Engineering students at Brown during the class hours, and to the scientific community and general public through conference/seminar presentations andjournal/patent publications.

技术摘要该项目旨在开发具有类似于哑铃的结构的新型复合纳米材料，该结构具有两个不同的功能性纳米颗粒单元，一个单元具有磁铁氧体（MFE2O4），铁，钴，镍，铁镍或钴铁，以及其他金属金，银色，银色，铂或palladium和Palladium。这两个功能单元通过一个晶体在另一个晶体上的外延生长在物理上联系。两个颗粒之间的外延连接可以视为纳米级连接，一个纳米颗粒中的电子能够在界面上转移到另一个纳米颗粒。这种连接效应可以改变哑铃结构中两个颗粒的电子结构，从而导致单个组分纳米颗粒中不存在的新型物理和化学特性。在本提案中实现的复合纳米结构的大小，形状和相互连接的合成控制将允许对哑铃结构中的连接效应进行微调，从而促进了先进的复合纳米材料的合理设计和合成，并促进了催化剂的最佳综合性能。它将为固态化学和纳米级材料提供新的内容：综合和应用，PI在布朗本科和研究生班的两个课程中教授了两个课程。复合纳米结构及其合理的方法将进一步丰富棕色化学，物理，工程和生命科学部门的纳米科学和纳米技术教育计划。拟议的研究将为科学和工程专业的学生的教育做出重要组成部分，以应对纳米科学和纳米技术的明天挑战。及时传播研究结果将是在上课时间内通过会议/研讨会演讲以及杰尔纳尔/专利出版物的科学界和公众的科学/工程专业的学生。