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具有类似哑铃结构的新型复合纳米材料，其具有两种不同的功能纳米颗粒单元，一种是磁性铁氧体（MFe 2 O 4）、铁、钴、镍、铁镍或钴铁，另一种是金属金、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。两个颗粒之间的外延连接可以被认为是纳米级结，并且一个纳米颗粒中的电子能够穿过界面转移到另一个纳米颗粒。这种结效应可以改变哑铃结构中两种颗粒的电子结构，导致单组分纳米颗粒中不存在的新的物理和化学性质。合成控制的尺寸，形状和互连的复合纳米结构，在这个建议中实现，将允许微调的哑铃结构中的结效应，促进合理的设计和合成的先进的复合纳米材料的最佳性能的催化application.Non-technical AbstractThe建议的研究代表了一个新的方向，在固态复合纳米结构的研究。它将为固态化学和纳米材料：合成与应用提供新的内容，这两门课程PI一直在布朗大学的本科和研究生课程中教授。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计划。这项研究将为理工科学生的教育做出重要贡献，以迎接未来纳米科学和纳米技术的挑战。研究成果的及时传播将在布朗大学的科学/工程专业的学生在课堂上，并通过会议/研讨会的介绍和期刊/专利出版物向科学界和公众。