U.S.-France Cooperative Research: Dependence of Optical and Nonradiative Relaxation Properties of Copper Nanoparticles on Shape and Self-Assembly

[12926] el - sayd这项为期两年的奖是为了支持美法在纳米粒子研究方面的合作，参与者包括佐治亚理工学院和皮埃尔和玛丽居里大学（巴黎第六大学）的研究人员和学生。美国的Mostafa El-Sayed和法国的Marie-Paule Pileni领导了这项合作。联合小组将检查不同大小和形状的单个和组合铜纳米颗粒的辐射和非辐射特性。铜粒子代表了一种新的、有趣的纳米粒子体系。他们的性质，如表面等离子体吸收，声呼吸，振荡，电子-声子和声子-声子弛豫过程将被研究。球形和棒状纳米粒子由于自组装和粒子内相互作用而发生的变化将被研究。实验涉及飞秒瞬态激光光谱方法和纳米颗粒的单分散尺寸和形状分布。这种合作融合了不同的实验方法和专业知识。这个美国小组是超快激光方法和光谱实验方面的专家。法国在单分散纳米粒子合成方面的专业知识，包括铜纳米点和纳米棒，以及纳米粒子自组装方面的专业知识，对这一点进行了补充。这项合作促进了对纳米材料光学和机械特性的理解。纳米颗粒材料对于新型电子器件、光学器件和生物材料具有重要意义。研究生也会受益。他们将接受先进合成和自组装技术的培训。该奖项代表了美国方面对NSF和CNRS的平行提案。美国国家科学基金会将支付美国研究员、博士后研究员和学生的旅费和生活费。法国研究中心将支持法国研究人员和学生访问美国。

0129263El-SayedThis two-year award for US-France collaboration in nanoparticle research involves researchers and students at Georgia Institute of Technology and the University Pierre and Marie Curie (Paris VI). The principal investigators, Mostafa El-Sayed in the US and Marie-Paule Pileni in France, lead the collaboration. The combined teams will examine radiative and nonradiative properties of individual and assembled copper nanoparticles of different sizes and shapes. Copper particles represent a new and interesting nanoparticle system. Their properties such as surface plasmon absorption, acoustic breathing, oscillations, electron-phonon and phonon-phonon relaxation processes will be studied. Changes in spherical and rod-shaped nanoparticles as a result of self-assembly and intraparticle interactions will be investigated. Experiments involve femtosecond transient laser spectroscopic methods and monodispersed size and shape distributions of nanoparticles. The collaboration merges different experimental methods and expertise. The US group is expert in ultrafast laser methods and spectroscopic experiments. This is complemented by French expertise in the synthesis of monodispersed nanoparticles, including copper nanodots and nanorods, and nanoparticle self-assembly. This collaboration advances understanding of the optical and mechanical properties of nanomaterials. Nanoparticle materials are important for new electronic devices, optical devices, and biological materials. Graduate students also benefit. They will receive training in advanced synthetic and self-assembly techniques. This award represents the US side of parallel proposals to the NSF and the CNRS. NSF will cover travel funds and living expenses for the US investigator, postdoctoral researcher and students. The CNRS will support visits by French researchers and students to the United States.