MRI: Acquisition of an Ultrafast Transient Absorption Spectrometer

MRI：购买超快瞬态吸收光谱仪

• 批准号: 1919633
• 负责人: Kenneth Hanson
• 金额: $ 32.15万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-07-01 至 2022-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1919633&HistoricalAwards=false
• 关键词: MRI; Acquisition; Ultrafast; Transient; Absorption

This award is supported by the Major Research Instrumentation and the Chemistry Research Instrumentation Programs. Professor Kenneth Hanson from Florida State University and colleague Lei Zhu have acquired an ultrafast transient absorption laser spectrometer. Transient absorption (TA) spectroscopy is a powerful technique for monitoring a sample's change in energy absorbance (i. e., color) with respect to time after excitation by a flash of light from a laser. TA is employed to study photochemistry and photophysical processes such as the conversion of sunlight into energy. Such processes can be very fast, on a time scale of a femtosecond which is 14 orders of magnitude faster than 1 second. The ultrafast laser system is used to characterize new materials which have desirable properties such as better solar cells or light emitting diodes. The spectrometer is used to train students in ultrafast technology and applications at Florida State University and other institutions including the neighboring HBCU Florida A&M University as well as Central Florida University, New College of Florida, Virginia Military Institute and the University of South Carolina. The award will enhance research and education broadly. One research area being investigated is photocurrent generation in materials with self-assembled organic-inorganic interfaces. Fluorescent molecules that can emit simultaneously at different wavelengths for applications including bio-imaging are also currently investigated. The properties of photomagnets, a fundamentally interesting and technologically promising group of light responsive materials, are being evaluated. Halide perovskite are intensively studied for their remarkable performance in optoelectronic devices such as solar cells. Exciton self-trapping (or excited state structural reorganization) processes in low dimensional organic metal halide hybrids with unique photophysical properties are also studied in a collaboration with Oak Ridge National Laboratory.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项由主要研究仪器和化学研究仪器项目支持。来自佛罗里达州立大学的Kenneth Hanson教授和他的同事朱磊获得了一台超快瞬态吸收激光光谱仪。瞬态吸收（TA）光谱学是一种强大的技术，用于监测样品在激光闪光激发后能量吸光度（即颜色）随时间的变化。TA被用来研究光化学和光物理过程，如阳光转化为能量。这样的过程可以非常快，在飞秒的时间尺度上，比1秒快14个数量级。超快激光系统用于表征具有理想性能的新材料，如更好的太阳能电池或发光二极管。该光谱仪用于在佛罗里达州立大学和其他机构培训学生的超快技术和应用，包括邻近的HBCU佛罗里达a&m大学以及中佛罗里达大学，佛罗里达新学院，弗吉尼亚军事学院和南卡罗来纳大学。该奖项将广泛促进研究和教育。目前正在研究的一个研究领域是在具有自组装有机-无机界面的材料中产生光电流。荧光分子可以同时发射不同波长的应用，包括生物成像，目前也在研究中。光磁体是一种非常有趣且技术上很有前途的光响应材料，其特性正在进行评估。卤化物钙钛矿因其在太阳能电池等光电器件中的卓越性能而受到广泛研究。与橡树岭国家实验室合作研究了具有独特光物理性质的低维有机金属卤化物杂化体中的激子自捕获（或激发态结构重组）过程。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Inhibited interlayer electron transfer in metal ion linked multilayers on mesoporous metal oxide films

介孔金属氧化物薄膜上金属离子连接多层膜中层间电子转移的抑制

• DOI: 10.1016/j.jpap.2021.100088
• 发表时间: 2022
• 期刊: Journal of Photochemistry and Photobiology
• 作者: Arcidiacono, Ashley;Robb, Alex J.;Masitas, Rafael A.;Salpage, Sahan R.;McLeod, Grace M.;Chen, Jiaqi;Ogunsolu, Omotola O.;Roper, Michael G.;Hanson, Kenneth
• 通讯作者: Hanson, Kenneth

Ultrafast Triplet Generation at the Lead Halide Perovskite/Rubrene Interface

• DOI: 10.1021/acsenergylett.1c02732
• 发表时间: 2022-01-12
• 期刊: ACS ENERGY LETTERS
• 影响因子: 22
• 作者: Conti, Carl R., III;Bieber, Alexander S.;Nienhaus, Lea
• 通讯作者: Nienhaus, Lea