Relation between Optical and Charge Properties of Individual Semiconductor Nanocrystals and Nanorods

在这个项目中，由化学部的实验物理化学计划和材料研究部的固态化学计划资助，克劳斯将研究电荷对单个胶体CdSe纳米晶体（NC）和纳米棒（NR）的光学性质的影响，以便更好地了解这些材料的最基本性质，例如，他们异常的“开-关”或眨眼行为。使用一种新的原子力显微镜（AFM）和倒置显微镜，电荷和发光图像之间的相关性的单个CdSe纳米粒子将进行研究。 同样，这项工作将试图通过力显微镜来确定单个CdSe NR的永久电偶极矩。 单个NR的电荷和发光图像之间的相关性可用于确定电荷对其光学性质的影响。 CdSe NCs和NR是具有潜在巨大技术影响的非常有前途的材料，然而，只有充分理解电荷与光学和电子性质之间的关系，并且电荷的有害影响被最小化或去除，才能实现。 这项工作将与学生和博士后研究人员一起完成。 他们将在当代科学的前沿领域获得宝贵的经验，这将为他们的高级研究或进入科学/技术劳动力做好准备。

In this project, funded by the Experimental Physical Chemistry Program of the Chemistry Division and the Solid State Chemistry Program of the Division of Materials Research, Krauss will investigate the effect of charges on the optical properties of single colloidal CdSe nanocrystals (NCs) and nanorods (NRs) in order to obtain a better understanding of the most fundamental properties of these materials, such as, for example, their exceptional "on-off" or blinking behavior. Using a novel atomic force microscope (AFM) and an inverted microscope, the correlation between charge and luminescent images of single CdSe NCs will be studied. Similarly, the work will attempt to determine the permanent electric dipole moment of single CdSe NRs by means of force microscopy. Correlations between charge and luminescent images for single NRs can be used to determine the effects of charges on their optical properties. CdSe NCs and NRs are highly promising materials with potentially great technological impacts, which, however, can be realized only if the relationship between electric charges and optical and electronic properties are fully understood, and the harmful effects of electric charges be minimized or removed. This work will be done with students and postdoctoral research associates. They will acquire valuable experience in a forefront area of contemporary science that will prepare them for advanced studies or entry in the scientific/technological workforce