CAREER: Synthesis, Characterization and Physical Properties of One-Dimensional Rare Earth Chalcogenide Nanomaterials

职业：一维稀土硫族化物纳米材料的合成、表征和物理性能

• 批准号: 0548232
• 负责人: Song Jin
• 金额: $ 54万
• 依托单位: University of Wisconsin-Madison
• 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: 2006-03-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0548232&HistoricalAwards=false
• 关键词: CAREER; Synthesis; Characterization; Physical; Properties

TECHNICAL EXPLANATIONThis proposal aims to synthesize novel one-dimensional nanomaterials based on technologically and fundamentally important rare earth sulfides, such as ferromagnetic semiconducting europium sulfide (EuS) and intermediate valence metal samarium sulfide (SmS), and study their unique physical properties. These chemically synthesized single crystalline nanomaterials would enable both potential applications in spintronics and fundamental physical studies in nanoscale structures with highly correlated electrons. Taking a multidisciplinary approach, the PI and his co-workers will develop organometallic precursors to synthesize uniform or mixed rare earth sulfide nanowires by chemical vapor deposition, characterize the nanoscale structures and physical properties of the resulting nanomaterials using a variety of techniques in order to understand the synthesis-structure-property relationship. They will further investigate the relationship between ferromagnetism and semiconductivity of EuS nanowires and examine the size evolution of the fundamental properties. The PI also proposes to build an integrated educational program in materials chemistry by developing a graduate level course in nanomaterials chemistry, by encouraging and incorporating minority and underrepresented undergraduate students to participate in scientific research, and by collaboratively developing a Web based course on nanoscience and nanotechnology for high school teachers so that teachers can have the toolbox needed to incorporate elements of cutting edge science and technology into their curriculum. NON-TECHNICAL EXPLANATIONNanometer scale wires (nanowires) that are made of technologically useful and fundamentally important rare earth sulfide materials will be created, and their unique physical properties will be investigated for a variety of potential applications, such as the next generation nanoscale spin electronic ("spintronic") and magento-optical information storage devices. Despite the interesting combination of magnetic and semiconducting properties that rare earth sulfide materials possess, materials issues remain to be addressed. This interdisciplinary research proposal will lay the scientific foundation to enable the creation and understanding of these high quality nanoscale materials. Furthermore, an integrated educational program in materials chemistry will be built by developing a new graduate level course in nanomaterials chemistry, by encouraging and incorporating minority and underrepresented undergraduate students to participate in cutting edge scientific research, and by collaboratively developing the first Web based course on nanoscience and nanotechnology for high school teachers so that teachers can have the toolbox needed to incorporate elements of cutting edge science and technology into their curriculum. All of these will stimulate and engage the interest of students in science and technology and help to prepare the new generation of scientific and technological workforce.

本建议旨在合成一维纳米材料，并研究其独特的物理性质。该材料是一种基于技术上和基础上重要的稀土硫化物的新型一维纳米材料，如铁磁半导体硫化铕(EUS)和中价金属硫化钐(SMS)。这些化学合成的单晶纳米材料将使其在自旋电子学和具有高度关联电子的纳米结构的基础物理研究中具有潜在的应用。PI和他的同事们将采取多学科的方法开发有机金属前驱体，通过化学气相沉积合成均匀或混合的稀土硫化物纳米线，利用各种技术表征得到的纳米材料的纳米结构和物理性质，以了解合成-结构-性能之间的关系。他们将进一步研究EUS纳米线的铁磁性和半导性之间的关系，并检查基本性质的尺寸演变。PI还建议建立材料化学综合教育计划，开发纳米材料化学研究生课程，鼓励和吸收少数族裔和代表性不足的本科生参与科学研究，并合作为高中教师开发一门基于网络的纳米科学和纳米技术课程，以便教师可以拥有将尖端科学和技术元素纳入其课程所需的工具箱。非技术解释由技术上有用和基本重要的稀土硫化物材料制成的纳米级电线(纳米线)将被创造出来，其独特的物理性质将被研究用于各种潜在的应用，例如下一代纳米级自旋电子(自旋电子学)和磁光信息存储设备。尽管稀土硫化物材料具有磁性和半导体特性的有趣组合，但材料问题仍有待解决。这项跨学科的研究提案将为创造和理解这些高质量的纳米材料奠定科学基础。此外，还将建立材料化学的综合教育计划，开发一门新的研究生水平的纳米材料化学课程，鼓励和吸收少数族裔和代表性不足的本科生参与尖端科学研究，并合作为高中教师开发第一门基于网络的纳米科学和纳米技术课程，以便教师可以拥有将尖端科学和技术元素纳入其课程所需的工具箱。所有这些都将激发和吸引学生对科学技术的兴趣，有助于培养新一代科技劳动力。