CAREER: Structure-specific Nanoscale Dynamics Studied by Nonlinear and Magneto-optical Spectroscopy

这个职业奖的大分子，超分子和纳米化学（MSN）计划支持肯尼斯Knappenberger教授在佛罗里达州立大学的工作-赋予开发先进的光谱技术，用于调查金纳米结构的尺寸依赖性和结构特定的光学性质，范围从量子限制簇（2 nm）等离子体支持粒子（2 nm）。具体来说，PI，沿着与研究生，将开发飞秒时间分辨磁光技术，研究电子结构和激发态动力学的大小选择的金纳米团簇。PI还将开发能够进行单粒子测量的非线性显微镜平台。这些数据将通知等离子体激元模式，导致在小聚集体和光刻形成的阵列中的金纳米结构的杂交。 在这两个领域取得的进展将被合并来描述等离子体介导的电偶极跃迁，非线性成像设施将扩展到一个磁光平台，能够状态分辨等离子体增强测量。该奖项将允许Knappenberger教授开发先进的测量技术，以系统地研究纳米颗粒结构-功能相互作用。这项研究将影响几个技术领域：太阳能转换，国家安全，痕量级分析和高对比度生物医学成像。此外，将建立能够提供时间和空间分辨的磁光数据的新设施。因此，该小组将建立一个独特的专业知识，可以应用于需要自旋和氧化态信息的许多科学和技术领域的问题。该计划将在佛罗里达州立大学的跨学科环境中教育本科生和研究生，并将受益于与国家高磁场实验室的密切互动。此外，在努力提高理解和激发不同群体的高中学生对科学和技术的兴趣，Knappenberger教授将与高中教师密切合作，将新的仪器引入基于图像的化学课程。 最后，作为调查员课堂教学的延伸，将开发一系列教学视觉材料，向不同的受众描述科学仪器的正确使用。

This CAREER award by the Macromolecular, Supramolecular, and Nanochemistry (MSN) program supports work by Professor Kenneth Knappenberger at Florida State University -endowed to develop advanced spectroscopic techniques for the investigation of the size-dependent and structure-specific optical properties of gold nanostructures ranging from quantum-confined clusters ( 2 nm) to plasmon-supporting particles ( 2 nm). Specifically, the PI, along with graduate students, will develop femtosecond time-resolved magneto-optical techniques to study both the electronic structure and excited state-dynamics of size-selected gold nanoclusters. The PI will also develop a nonlinear microscopy platform capable of single-particle measurements. These data will inform on plasmon modes that result from hybridization of gold nanostructures in both small aggregates and lithographically formed arrays. Advances made in these two areas will be merged to describe plasmon-mediated electric-dipole transitions, and the nonlinear imaging facility will be extended to a magneto-optical platform capable of state-resolved plasmon-enhancement measurements. The award will allow Professor Knappenberger to develop advanced measurement technologies to investigate systematically the nanoparticle structure-function interplay. This research will impact several technical areas: solar-energy conversion, national security, trace-level analysis and high-contrast biomedical imaging. Moreover, new facilities, capable of providing temporally and spatially resolved magneto-optical data, will be established. As a result, the group will establish a unique expertise that can be applied to problems in many areas of science and technology that require spin and oxidation state information. This program will educate both undergraduate and graduate students in an interdisciplinary environment at Florida State University and will benefit from close interactions with the National High Magnetic Field Laboratory. Also, in an effort to improve understanding and stimulate interest in science and technology among a diverse group of high school students, Professor Knappenberger will work closely with a high school teacher to introduce new instrumentation into an image-based chemistry curriculum. Finally, as an extension of the investigator's classroom teaching, a series of instructional visual materials will be developed to describe proper use of scientific instruments to a diverse audience.