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

0323617 ElsayedDescription：该项目支持格鲁吉亚亚特兰大格鲁吉亚理工学院化学和生物化学系Mostafa El-Sayed博士和埃及开罗艾因夏姆斯大学物理系哈桑塔拉特博士之间的合作研究项目。 该项目旨在研究半导体和金属纳米晶体的表面性质。 人们正在进行大量的研究来合成和研究金属和半导体纳米颗粒的光学和非辐射性质。由于它们的尺寸很小，它们的许多性质都是由其表面的结构和动力学性质决定的。 然而，这些都是最少研究，因此最不了解。 PI由材料研究部支持，以合成和研究这些粒子及其组件的光学和非辐射特性。 所观察到的性质非常依赖于表面，但不了解表面结构如何定量地影响纳米颗粒的性质。有必要了解的结构和动力学性质的表面。 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。 这些已经合成，并在Ga Tech和Ain Shams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相关性可以帮助我们了解表面如何影响纳米结构材料的不同性质。范围：该项目将使美国年轻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格鲁吉亚理工学院的科学研究中获益。 埃及合作者哈桑塔拉特博士获得固体物理学研究生学位，并在美国攻读博士后和高等培训。 他正在进行一项积极的研究项目，开发不同的拉曼技术，以研究半导体和金属材料的表面和界面。 利用表面等离子激元，他能够研究金属薄膜的表面。 因此，这种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.