SGER: Multiscale Simulation of Nanostructures: Nanocrystal Quantum Dots, Rods, and Tetrapods

SGER：纳米结构的多尺度模拟：纳米晶体量子点、棒和四足体

• 批准号: 0313482
• 负责人: Priya Vashishta
• 金额: $ 8.99万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0313482&HistoricalAwards=false
• 关键词: SGER; Multiscale; Simulation; Nanostructures; Nanocrystal

It is proposed to explore semiconductor nanocrystals such as quantum dots, rods and tetrapods, as templates for self-assembled 3D architectures of themselves and of core-shell nanocomposites . Multiscale simulations will be performed on Cd-S, Cd-Se, Zn-S, Ga-As, and In-As and their core shell nanocomposites. The relevant dimensional range in most cases will extend from the nanometer to the continuum, or part of it. They will be accomplished by a seamless combination of finite element continuum theories, molecular dynamics, and quantum mechanical calculations. Successful three-dimensional accounts of the resulting space distribution of atoms will yield a number of property and structural changes, at both bulk and atomistic levels. Among others, they will bring out the effects of nanocrystal size and shape, of organic molecules surface termination, and of nanoindentation testing on tetrapods and their arrays. The multimillion-atom multiscale simulation will be displayed and steered in an immersive and interactive visualization program, its infrastructure being made available by the State of Louisiana . The three PIs have already accumulated an extensive practice with molecular dynamics applications (~10 million atoms). In addition, the they have initiated a close cooperative collaboration with Dr. Alivisatos' experimental program at the University of California- Berkeley. There are also plans to offer a number of cross disciplinary courses, leading to a dual-degree program ( physical/biological and computer sciences), to web-based global courses and to mentoring activities. In summary, the PIs have accumulated an extensive experience in the field of parallel multiscale simulation, and have proceeded to obtain access to the corresponding high performance hardware and software. This should give them now a chance to test the behavior of a number of semiconductors, in a more diversified range of circumstances. To explore such a promising possibility, it is recommended that a one-year SCER award of $94,962 be granted, with a starting date of September 1, 2001.

有人建议探索半导体纳米晶体，如量子点，棒和四脚体，作为模板，自组装的3D架构本身和核壳纳米复合材料。将对Cd-S、Cd-Se、Zn-S、Ga-As和In-As及其核壳纳米复合材料进行多尺度模拟。在大多数情况下，相关的尺寸范围将从纳米扩展到连续体，或其一部分。 连续统理论、分子动力学和量子力学计算。 成功 对所得到的原子空间分布的三维计算将在体和原子水平上产生许多性质和结构变化。除其他外，他们将带来的影响，尺寸和形状，有机分子的表面终止，和纳米压痕测试四足动物及其阵列。 数百万原子的多尺度模拟将在一个沉浸式和交互式可视化程序中显示和操纵，其基础设施由路易斯安那州提供。这三个PI已经积累了广泛的分子动力学应用实践（约1000万个原子）。此外，他们还与Alivisatos博士在加州-伯克利大学的实验项目展开了密切的合作。还计划开设一些跨学科课程，最终开设双学位课程（物理/生物和计算机科学），开设基于网络的全球课程，并开展辅导活动。 总之，PI在并行多尺度仿真领域积累了丰富的经验，并已着手获得相应的高性能硬件和软件。这应该让他们现在有机会在更多样化的环境中测试一些半导体的行为。为了探索这种有希望的可能性，建议颁发为期一年的SCER奖励，金额为94，962美元，开始日期为2001年9月1日。