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

职业：通过非线性和磁光光谱研究特定结构的纳米级动力学

• 批准号: 1801829
• 负责人: Kenneth Knappenberger
• 金额: $ 6.38万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-10-03 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1801829&HistoricalAwards=false
• 关键词: CAREER; Structure; specific; Nanoscale; Dynamics

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.

这项由大分子、超分子和纳米化学(MSN)计划颁发的职业奖项支持佛罗里达州立大学的Kenneth Knappberger教授的工作，该教授致力于开发先进的光谱技术，研究从量子限制团簇(2 Nm)到等离子体支持粒子(2 Nm)的金纳米结构的尺寸依赖和结构特定的光学性质。具体地说，PI将与研究生一起开发飞秒时间分辨磁光技术，以研究尺寸选定的金纳米团簇的电子结构和激发态动力学。PI还将开发一个能够进行单粒子测量的非线性显微镜平台。这些数据将提供有关等离子体激元模式的信息，这些模式是由于金纳米结构在小聚集体和光刻形成的阵列中杂交而产生的。在这两个领域取得的进展将被合并，以描述等离子体激元介导的电偶极子转变，并且非线性成像设备将扩展到能够进行状态分辨等离子体激元增强测量的磁光平台。该奖项将允许克纳彭伯格教授开发先进的测量技术，系统地研究纳米颗粒结构与功能的相互作用。这项研究将影响几个技术领域：太阳能转换、国家安全、痕迹水平分析和高对比度生物医学成像。此外，还将建立能够提供时间和空间分辨磁光数据的新设施。因此，该小组将建立一种独特的专业知识，可以应用于需要自旋和氧化状态信息的许多科学和技术领域的问题。该项目将在佛罗里达州立大学的跨学科环境中培养本科生和研究生，并将受益于与国家强磁场实验室的密切互动。此外，为了提高不同群体的高中生对科学技术的理解和兴趣，克纳彭伯格教授将与一名高中教师密切合作，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，将开发一系列教学可视材料，向不同的受众描述科学仪器的正确使用。