Collaborative Research: Engineering the Morphology and Microstructure of Group III-V Compound Semiconducting Nanowires

提案标题：合作研究：工程的形态和微观结构的第三-五族化合物半导体纳米线机构：加州大学洛杉矶分校摘要日期：08/03/09加州大学洛杉矶分校和布朗大学之间的跨学科合作研究工作的目标是定量地了解的机制的增长第三-五族化合物半导体纳米线异质结构，从而发展战略，以适应其形态，结晶度和化学.半导体纳米线由于其在光电子学、纳米电子学、传感器、能量收集和能量存储等方面的潜在应用，近年来受到了广泛的关注。然而，由于在生长期间发生的动力学不稳定性，所需的多组分纳米线异质结构的生长是困难的。为了解决这个问题，拟议中的研究将结合联合收割机在原位（以及非原位）的纳米线生长的温度，时间，流量和催化剂组合物的函数的研究与理论/计算建模。模拟的形貌和结构将与实验观察结果相结合，以定量描述纳米线生长过程中的形貌、结构和成分演变，如果成功，本研究的结果将提供对纳米线异质结构形成的全面理解，并有助于开发具有所需性能的先进功能材料的制造技术。提出的实验和计算方法是通用的，适用于研究（和预测）纳米结构生长在其他材料系统以及其他合成（例如，溶液相）方法。将传播研究结果，以加强对纳米线生长机制的理解。现场观察和生长模拟的视频将在网上发布，以提高公众对纳米科学和纳米技术的兴趣。研究生和工程本科生将受益于课堂教学和参与研究。高中生将被邀请为他们提供第一手的研究经验，这将鼓励他们追求工程方面的高等教育

Proposal Title: Collaborative Research: Engineering the Morphology andMicrostructure of Group III-V Compound SemiconductingNanowiresInstitution: University of California-Los AngelesAbstract Date: 08/03/09The goal of this interdisciplinary collaborative research effort between UCLA and BrownUniversity is to quantitatively understand the mechanisms governing the growth ofgroup III-V compound semiconducting nanowire heterostructures and hence developstrategies to tailor their morphology, crystallinity, and chemistry. Semiconductingnanowires have recently gained considerable attention owing to their potential forapplications in optoelectronics, nanoelectronics, sensors, energy harvesting, andenergy storage. However, growth of desired multi-component nanowire heterostructuresis difficult due to kinetic instabilities occurring during growth. To address this issue, theproposed research will combine in situ (as well as ex situ) studies of nanowire growth asa function of temperature, time, flux, and catalyst composition withtheoretical/computational modeling. Simulated morphologies and structures will then becompared with experimental observations to quantitatively describe the morphological,structural, and compositional evolution during the growth of nanowires.If successful, the results of this research will provide a holistic understanding of thenanowire heterostructure formation and help develop technologies for the fabrication ofadvanced functional materials with desired properties. The proposed experimental andcomputational methods are general and applicable to investigate (and predict)nanostructure growth in other material systems as well as other synthesis (eg., solutionphase) methods. The results will be disseminated to enhance the understanding of thenanowire growth mechanisms. Videos of in situ observations and growth simulations willbe posted on the Web to promote interest in nanoscience and nanotechnology amongthe public. Graduate and engineering undergraduate students will benefit throughclassroom instruction and involvement in the research. High-school students will beengaged to provide them firsthand research experience that will encourage them topursue higher education in engineering