Material Properties of Nanospheres and Nanorods Studied by Time-Resolved Spectroscopy

在这个由化学学部实验物理化学项目资助的项目中，Hartland将通过超快时间分辨光谱研究纳米球和纳米棒的材料特性。具体来说，该技术依赖于短脉冲激光照明产生的相干激发振动模式所产生的节拍。通过检查电子-电子和电子-声子耦合来探测电子性质。六个单独的项目将进行，从测量高温下金属纳米粒子的对称呼吸模式，通过双金属粒子中电子-电子相互作用的超快研究，到测量单个金纳米棒的时间分辨各向异性。拟议的研究包括开发将导致纳米颗粒技术应用的新方法。学生的教学和培训将在各个层次进行，包括研究参与。因此，学生将接受材料科学和化学前沿领域之一的培训，为工业，学术界或政府实验室的高级学习或就业做准备。

In this project, funded by the Experimental Physical Chemistry Program of the Chemistry Division, Hartland will study the material properties of nanospheres and nanorods by means of ultrafast time-resolved spectroscopy. Specifically, the technique relies on beats due to coherently excited vibrational modes that result from short pulse laser illumination. Electronic properties are probed by examining electron-electron and electron-phonon coupling. Six individual projects will be undertaken, ranging from measurements of the symmetric breathing modes of metal nanoparticles at high temperatures, through ultrafast studies of electron-electron interactions in bimetallic particles, to measurements of the time-resolved anisotropy of single Au nanorods. The proposed research includes the development of new methods that will result in applications to the technology of nanoparticles. Teaching and training of students will be done at all levels, inclusive of research participation. The students will thereby receive training in one of the forefront areas of materials science and chemistry in preparation for advanced studies or employment in industry, academia, or government laboratories.