US-Egypt Cooperative Research: Surface Properties of Semiconductor and Metallic Nanocrystals

项目描述：本项目支持乔治亚州亚特兰大佐治亚理工学院化学与生物化学系Mostafa El-Sayed博士与埃及开罗艾因沙姆斯大学物理系Hassan Talaat博士的合作研究项目。该项目是研究半导体和金属纳米晶体的表面特性。人们对金属和半导体纳米粒子的光学和非辐射特性进行了大量的研究。由于它们的体积小，它们的许多性能是由其表面的结构和动力学特性决定的。然而，这些研究最少，因此也最不为人所知。PI由材料研究部提供支持，以合成和研究这些粒子及其组合的光学和非辐射特性。所观察到的性质在很大程度上依赖于表面，但表面结构如何定量地影响纳米颗粒的性质尚不清楚。有必要了解表面的结构和动力学性质。pi建议联合研究不同尺寸和形状的不同半导体纳米颗粒的表面。他们已经合成了这些材料，并在佐治亚理工大学和艾因沙姆斯大学研究了它们的光学和弛豫特性。将使用自组装半导体和金属纳米结构。光学和电子弛豫性质与表面性质之间的关系有助于我们了解表面如何影响纳米结构材料的不同性质。范围：该项目将使年轻的美国科学家了解这项新技术。此外，他们对埃及及其年轻人的教育将是有价值的。此外，这项合作研究将使年轻的埃及学生有机会从在佐治亚理工学院进行科学研究中获益。埃及合作者哈桑·塔拉特博士（Hassan Talaat）获得了固体物理学研究生学位，并在美国进行了博士后和高等培训研究。他正在进行一项积极的研究项目，开发不同的拉曼技术来研究半导体和金属材料的表面和界面。利用表面等离子体激元，他能够研究金属薄膜的表面。因此，合作提供了协同效益。

0323617 ElsayedDescription: This project supports a cooperative research project between Dr. Mostafa El-Sayed, Department of Chemistry and Biochemistry at Georgia Institute of Technology, Atlanta, Georgia and Dr. Hassan Talaat, Department of Physics, Ain Shams University, Cairo, Egypt. The project is to study the surface properties of semiconductor and metallic nanocrystals. A great deal of research is being carried out to synthesize and study the optical and nonradiative properties of metallic and semiconductor nanoparticles. Due to their small size, many of their properties are determined by the structural and dynamical properties of its surface. Yet these are the least studied and thus the least understood. The PI is being supported by the Division of Materials Research to synthesize and study the optical and nonradiative properties of these particles and their assemblies. The observed properties are very much surface dependent but it is not understood how the surface structure quantitatively affects the nanoparticle properties. There is need for understanding the structure and dynamical properties of the surfaces. The PIs propose to jointly study the surfaces of different semiconductor nanoparticles of different sizes and shapes. These have been synthesized and their optical and relaxation properties have been studied at Ga Tech and Ain Shams University. Self assembled semiconductor and metallic nanostructures will be used. The correlation between the optical and electronic relaxation properties and the surface properties could help us understand how the surface affects the different properties of nanostructured material.Scope: The project will enable young US scientists to learn about this new technique. In addition, their education about Egypt and its young people will be valuable. In addition, this collaborative research will give the young Egyptian students the opportunity to gain from carrying scientific research at Georgia Tech. The Egyptian collaborator, Dr. Hassan Talaat, received his graduate degrees in solid-state physics, and did post doctorate and higher training studies in the United States. He is carrying out an active research project in developing different Raman techniques to study the surface and the interfaces of semiconductor and metallic materials. Using surface plasmon polaritons, he is able to study the surface of metallic thin films. Thus the collaboration provides synergistic benefits.