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.

技术摘要本项目旨在开发新型复合纳米材料，其结构类似于哑铃，具有两种不同功能的纳米颗粒单元，一种是磁性铁氧体（MFe2O4）、铁、钴、镍、铁镍或钴铁，另一种是磁性铁氧体（MFe2O4）、铁、钴、镍、铁镍或钴铁。金属金、银、铂或钯。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而物理连接。两个粒子之间的外延连接可以被视为纳米级连接，一个纳米粒子中的电子能够穿过界面转移到另一个纳米粒子。这种连接效应可以改变哑铃结构中两种粒子的电子结构，从而产生单组分纳米粒子所不存在的新颖的物理和化学特性。该提案实现的复合纳米结构的尺寸、形状和互连的综合控制将允许微调哑铃结构中的连接效应，促进合理设计和合成具有催化应用最佳性能的先进复合纳米材料。非技术摘要所提出的研究代表了固态复合纳米结构研究的新方向。它将为固体化学和纳米材料：合成与应用提供新内容，这两门课程是 PI 一直在布朗大学本科生和研究生班教授的课程。复合纳米结构及其合理的方法将进一步丰富布朗大学化学、物理、工程和生命科学系的纳米科学和纳米技术教育项目。拟议的研究将为科学和工程学生的教育做出重要贡献，以应对未来纳米科学和纳米技术的挑战。研究成果将在课堂上及时向布朗大学的科学/工程专业学生传播，并通过会议/研讨会演讲和期刊/专利出版物向科学界和公众传播。