Ultrafast Nonlinear Microscopy in Nanorods and Nanostructured Networks

纳米棒和纳米结构网络中的超快非线性显微镜

• 批准号: 0809045
• 负责人: John Papanikolas
• 金额: $ 46.1万
• 依托单位: University of North Carolina at Chapel Hill
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-15 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0809045&HistoricalAwards=false
• 关键词: Ultrafast; Nonlinear; Microscopy; Nanorods; Nanostructured

In this project, funded by the Experimental Physical Chemistry Program of the Chemistry Division, Prof. John M. Papanikolas of the University of North Carolina at Chapel Hill will combine pump-probe methodologies with nonlinear microscopy to investigate the charge carrier dynamics in one-dimensional nanostructures, networks and nanodevices on ultrafast time scales. The goal of the project is to elucidate the relation between the carrier dynamics and the local shape of the object, an issue that is fundamentally important and critical to understanding many problems in nanoscience and nanotechnology. Variation in behavior from structure-to-structure, and even between different spatial locations within the same structure, is a hallmark of complexity and its presence poses a major challenge to those wishing to exploit nanoscale materials in a variety of device applications. The project will develop a new microscopy technique that will excite a nanostructure in one spatial location and probe the dynamics in another, on time scales ranging from femtoseconds to nanoseconds. Professor Papanikolas and his students will use this spatially-separated pump-probe microscope to visualize charge carrier migration through individual nanorods and networks. This project will contribute to our understanding of complex nanosystems while promoting teaching, training, and learning in the context of a research program. Graduate, undergraduate and high school students will participate in this research. They will develop the technologically sophisticated instrumentation, apply those methods to the study of single nanostructures, take part in the communication of their results, and participate in the development of activities for middle school students that highlight their research.

在本研究项目中，由化学系实验物理化学计划资助，约翰M。位于查佩尔山的北卡罗来纳州大学的Papanikolas将把联合收割机泵浦探测方法与非线性显微镜结合起来，研究超快时间尺度上一维纳米结构、网络和纳米器件中的电荷载流子动力学。该项目的目标是阐明载体动力学和物体的局部形状之间的关系，这个问题对于理解纳米科学和纳米技术中的许多问题至关重要。从结构到结构，甚至在同一结构内的不同空间位置之间的行为变化是复杂性的标志，并且其存在对那些希望在各种器件应用中利用纳米级材料的人构成了重大挑战。 该项目将开发一种新的显微镜技术，该技术将在一个空间位置激发纳米结构，并在另一个空间位置探测动态，时间尺度从飞秒到纳秒不等。Papanikolas教授和他的学生将使用这种空间分离的泵浦-探测显微镜来可视化电荷载流子通过单个纳米棒和网络的迁移。该项目将有助于我们理解复杂的纳米系统，同时促进教学，培训和学习的研究计划的背景下。研究生、本科生和高中生将参与这项研究。 他们将开发技术先进的仪器，将这些方法应用于单一纳米结构的研究，参加他们的结果的交流，并参与中学生活动的开发，突出他们的研究。