Study of Structure-Physical Properties Relation of New Materials with Reduced Dimensionality
降维新材料的结构-物理性能关系研究
基本信息
- 批准号:0091639
- 负责人:
- 金额:$ 29.97万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2001
- 资助国家:美国
- 起止时间:2001-03-01 至 2007-02-28
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This project is devoted to investigating the influence of dimensionality on the physical properties of a new class of materials by tuning the dimensionality with pressure. The goal is to achieve an understanding which will provide the basis for tailoring materials for special applications . The project is a combination of materials synthesis, the application of high pressure techniques and theoretical modeling . In addition to the use of conventional diamond anvil cells and large volume pressure cells for hydrostatic pressure studies, a newly developed device for the simultaneous application of hydrostatic pressure and uniaxial stress will be employed. These will permit the control of parameters like lattice constant, bond length, and interaction strength in a manner not possible before. These experimental methods combined with theoretical modeling will lead to a better understanding of the structure - physical properties relation. The result will be improved tailoring of materials for applications by replacing the external pressure of our measurement by chemical pressure (substitution of atoms) or by growing thin films on substrates which are not lattice matched. Specific attention will be devoted to: 1)The synthesis of new materials of fundamental and technological importance and the investigation of their physics and chemistry at ambient and high pressure; 2) employ a new device for the application of "pure" strain which will allow transport and optical measurements at low temperatures and in a magnetic field; 3) develop collaborations concerning theoretical modeling with staff of the Los Alamos National Laboratory; and 4) provide interdisciplinary educational opportunities for graduate students.%%% This project is an experimental and theoretical program in materials research and education. The experimental studies will be conducted at the Colorado State University while the theoretical work will be done in collaboration with staff of the Los Alamos National Laboratory. The scientific problems that confront chemists and physicists in expanding their abilities to control smaller and more complex electronics will be elucidated through careful studies of low-dimensional materials which will be especially synthesized for this purpose. These materials, which display constrained dimensions, may behave as efficient, new semiconductor wires or sheets of atomic dimensions or nanodevices. In order to understand the physical phenomena associated with low-dimensional materials, very controlled studies will be performed whereby the research team will carefully apply pressures along predetermined directions in materials in order to correlate environmental and dimensional changes with electronic responses. By understanding the fundamental physical phenomena in low-dimensional materials, new, perhaps more efficient materials can be designed that will improve upon the conventional, commercial electronic materials. An important feature of the program is the multidisciplinary, international research team that is assembled. Research will be performed by students who will be part of a team of chemists and physicists in academic, National, and international laboratories. Students will participate in the synthesis, characterization and design of new materials and will travel to National research facilities at the Los Alamos and Argonne National Laboratories to utilize the latest, state-of-the-art instrumentation and will interact with the Nation's best chemists and physicists. ***
本项目致力于研究一种新型材料的尺寸对其物理性质的影响,方法是随压力调整尺寸。我们的目标是实现一种理解,这将为定制特殊应用的材料提供基础。该项目是材料合成、高压技术应用和理论建模相结合的项目。除了使用传统的金刚石砧池和大体积压力池进行静水压力研究外,还将采用一种新开发的同时应用静水压力和单轴应力的装置。这将允许以一种以前不可能的方式控制晶格常数、键长和相互作用强度等参数。这些实验方法与理论建模相结合,将有助于更好地理解结构-物性关系。通过化学压力(取代原子)或在晶格不匹配的基板上生长薄膜来取代我们测量的外部压力,结果将改善应用材料的剪裁。将特别关注:1)具有基础和技术重要性的新材料的合成及其在环境和高压下的物理和化学研究;2)采用一种用于“纯”应变应用的新装置,该装置将允许在低温和磁场下进行输运和光学测量;3)与洛斯阿拉莫斯国家实验室的工作人员开展关于理论建模的合作;4)为研究生提供跨学科的教育机会。这个项目是一个材料研究和教育的实验和理论项目。实验研究将在科罗拉多州立大学进行,而理论工作将与洛斯阿拉莫斯国家实验室的工作人员合作完成。化学家和物理学家在扩大他们控制更小、更复杂电子器件的能力方面所面临的科学问题,将通过对低维材料的仔细研究来阐明,这些材料将特别为此目的而合成。这些材料的尺寸受到限制,可能表现为高效的新型半导体线或原子尺寸的薄片或纳米器件。为了了解与低维材料相关的物理现象,将进行非常受控的研究,研究团队将仔细地沿着材料的预定方向施加压力,以便将环境和尺寸变化与电子响应联系起来。通过了解低维材料的基本物理现象,可以设计出新的,也许更高效的材料,从而改进传统的商业电子材料。该计划的一个重要特点是组建了多学科的国际研究团队。研究将由学生进行,他们将成为学术,国家和国际实验室的化学家和物理学家团队的一部分。学生将参与新材料的合成、表征和设计,并将前往洛斯阿拉莫斯和阿贡国家实验室的国家研究设施,使用最新、最先进的仪器,并将与美国最好的化学家和物理学家进行互动。***
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Hans Hochheimer其他文献
Hans Hochheimer的其他文献
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{{ truncateString('Hans Hochheimer', 18)}}的其他基金
Development of a Device for the Simultaneous Application of Uniaxial Stress and Hydrostatic Pressure
同时施加单轴应力和静水压力的装置的研制
- 批准号:
9406319 - 财政年份:1994
- 资助金额:
$ 29.97万 - 项目类别:
Standard Grant
High Pressure Brillouin Scattering Study of Incommensurate Systems
不通约系统的高压布里渊散射研究
- 批准号:
9310222 - 财政年份:1993
- 资助金额:
$ 29.97万 - 项目类别:
Continuing Grant
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