CAREER: Surface-Enhanced Nonlinear Spectroscopy: Mapping Electronic Excited States, Probing Surface Adsorbate Structure, and Ultrasensitive Detection

职业：表面增强非线性光谱：绘制电子激发态、探测表面吸附结构和超灵敏检测

• 批准号: 1512886
• 负责人: Jon Camden
• 金额: $ 36.07万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-07-31 至 2017-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1512886&HistoricalAwards=false
• 关键词: CAREER; Surface; Enhanced; Nonlinear; Spectroscopy

This CAREER award by the Chemical Measurement and Imaging (CMI) program supports Professor Jon Camden at the University of Tennessee Knoxville to develop surface nonlinear spectroscopy as a analytical method for probing the two-photon properties of molecules, surface adsorbate structure, and ultrasensitive detection. A method for measuring absolute SEHRS enhancement factors is presented and subsequently utilized to elucidate the respective roles of chemical and electromagnetic enhancements in SEHRS. The wavelength dependent nature of the molecule-plasmon coupling and of resonance enhanced hyper-Raman will provide information on the complex interplay of molecular excited states important in two-photon processes. Detailed comparisons between experiment and theory are pursued, which will benchmark new electronic structure methods for the calculation of nonlinear molecular properties. The studies will demonstrate SEHRS to be a powerful, routinely applicable, and ultrasensitive analytical tool. Further, this work will provide the basis for future studies of surface-enhanced nonlinear spectroscopy. In addition to the scientific objectives of this proposal, the PI seeks to increase the number of high-school students pursuing Science, Technology, Engineering, and Mathematics (STEM) majors in college. The PI will collaborate to provide curricular enrichment to local public high-schools through the creation of ASPIRE teams (Aspiring Scientists Participating in Research and Education). ASPIRE teams will deliver hands-on laboratory experiments to local high school classrooms once a month during the regular school year, for a total of six activities. The activities are aligned to meet the requirements of Tennessee State curriculum and introduce students to the properties of nanoscale materials. Regular assessments are used to refine the activities and gauge their impact.

化学测量和成像 (CMI) 项目颁发的这一职业奖支持田纳西州诺克斯维尔大学的乔恩·卡姆登 (Jon Camden) 教授开发表面非线性光谱学，作为探测分子双光子特性、表面吸附物结构和超灵敏检测的分析方法。 提出了一种测量绝对 SEHRS 增强因子的方法，随后用于阐明化学和电磁增强在 SEHRS 中各自的作用。分子-等离子体耦合和共振增强超拉曼的波长依赖性性质将提供有关双光子过程中重要的分子激发态复杂相互作用的信息。实验与理论之间进行了详细比较，这将为计算非线性分子性质的新电子结构方法奠定了基础。这些研究将证明 SEHRS 是一种强大的、常规适用的、超灵敏的分析工具。 此外，这项工作将为表面增强非线性光谱的未来研究提供基础。除了该提案的科学目标外，PI 还寻求增加在大学攻读科学、技术、工程和数学 (STEM) 专业的高中生数量。 PI 将通过创建 ASPIRE 团队（参与研究和教育的有抱负的科学家）合作，为当地公立高中提供丰富的课程。 ASPIRE 团队将在正常学年期间每月一次到当地高中教室进行动手实验室实验，总共六项活动。这些活动旨在满足田纳西州立大学课程的要求，并向学生介绍纳米材料的特性。定期评估用于完善活动并衡量其影响。