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

非技术描述：光致发光是指材料吸收不同颜色的光后发出的光，这些光具有较短的波长或较高的光子能量。发射光的颜色提供了有关材料电子特性的重要信息。条纹相机是一种复杂的科学仪器，它以皮秒的时间分辨率测量光脉冲强度随时间的变化。这项重大研究仪器（MRI）补助金为现有的光致发光测量系统增加了一个条纹相机。该组合仪器能够进行时间分辨光致发光测量，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态。新设备加强了布鲁克林学院研究生和本科生的培训。该工具可供纽约市地区的其他机构使用，从而促进更广泛的合作并增强研究专门知识。此外，布鲁克林学院的研究项目也为当地高中生带来了教育效益。技术说明：条纹相机的购置扩展了布鲁克林学院目前光致发光系统的时间分辨测量能力。该仪器支持一个关于固态单光子发射的宽带隙半导体的研究项目。它有助于理解潜在的光学和电子特性以及发射过程中的载流子动力学，这对于此类材料的光子器件应用是必要的。条纹相机的加入也支持了阳离子-π相互作用的光动力学及其在蛋白质功能中的作用的研究。它使测量寿命的时间分辨率高达皮秒的波长范围从深紫外到可见光的阳离子π相互作用的光谱表征的持续进展。该组合仪器的扩展时间和光学范围也适用于生物大分子的动力学研究：G-四链DNA。该奖项反映了NSF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。

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.