MRI: Acquisition of a Streak Camera System for Time-resolved Photoluminescence Spectroscopy

MRI：获取用于时间分辨光致发光光谱的条纹相机系统

• 批准号: 2117286
• 负责人: Mim Nakarmi
• 金额: $ 15.88万
• 依托单位: CUNY Brooklyn College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2117286&HistoricalAwards=false
• 关键词: MRI; Acquisition; Streak; Camera; System

Non-Technical Description:Photoluminescence is light emission from a material after absorption of light in a different color with a shorter wavelength or a higher photon energy. The color of the emitted light provides important information about the material's electronic properties. A streak camera is a complex scientific instrument that measures the variation of the intensity of light pulses with respect to time with picosecond temporal resolution. This major research instrumentation (MRI) grant adds a streak camera to an existing photoluminescence measurement system. The combined instrument enables time-resolved photoluminescence measurements to study the dynamics of the electronic relaxation processes in materials such as semiconductors, protein receptors, and DNA. The new equipment strengthens training of the graduate and undergraduate students at Brooklyn College. The instrument is accessible to other institutions in the New York City area, and thus promotes broader collaboration and enhances research expertise. In addition, the educational benefit extends to local high school students who are involved in research projects at Brooklyn College.Technical Description:The acquisition of a streak camera extends the time-resolved measurement capability in the current photoluminescence system at Brooklyn College. The instrument supports a research project on wide bandgap semiconductors for solid state single photon emissions. It helps understanding the underlying optical and electronic properties and carrier dynamics in the emission processes, which is necessary for photonic device application of such materials. The addition of the streak camera also supports research on photodynamics of the cation-pi interaction and its role in protein function. It enables measurements of lifetimes in temporal resolution up to picoseconds with wavelengths ranging from the deep ultraviolet to the visible for continued progress in the spectroscopic characterization of cation-pi interactions. The extended temporal and optical range of the combined instrument is also applied to a study of the dynamics of biological macromolecules: G-quadruplexed DNA.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.

非技术描述：光致发光是从不同颜色吸收的光发射的光发射，具有较短的波长或较高的光子能。发射光的颜色提供了有关材料电子特性的重要信息。条纹摄像头是一种复杂的科学仪器，可通过暂时分辨率来测量光脉冲强度的变化。这项主要的研究仪器（MRI）拨款为现有的光致发光测量系统增加了条纹摄像头。联合仪器可以实现时间分辨的光致发光测量，以研究半导体，蛋白质受体和DNA等材料中电子弛豫过程的动力学。新设备加强了布鲁克林学院的研究生和本科生的培训。纽约市地区的其他机构可以使用该工具，从而促进更广泛的合作并增强研究专业知识。此外，教育福利扩展到参与布鲁克林学院研究项目的当地高中生。技术描述：获得条纹摄像头的获取扩展了布鲁克林学院当前光致发光系统的时间分辨测量能力。该仪器支持固态单光子排放的宽带隙半导体的研究项目。它有助于理解发射过程中的基本光学和电子性能以及载体动力学，这对于光子设备应用此类材料是必不可少的。条纹摄像头的添加还支持对阳离子-PI相互作用的光动力学及其在蛋白质功能中的作用的研究。它可以测量时间分辨率的寿命，直到波长，从深层紫外线到可见的波长，在阳离子-PI相互作用的光谱表征中持续进展。联合仪器的扩展时间和光学范围还应用于对生物大分子动力学的研究：G Quepadruplexed DNA。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的影响审查标准来通过评估来通过评估来支持的。