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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Real-Space Investigation of Energy Transfer through Electron Tomography
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Real-Space Investigation of Energy Transfer through Electron Tomography

机译:通过电子断层扫描的能量转移实际空间调查

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摘要

We herein report the first real-space investigation of Forster resonance energy transfer (FRET) in two different types of quantum dot (QD) supramolecular assemblies by observing their three-dimensional (3D) configurations through high-resolution electron tomography. Owing to its critical role in photosynthesis, artificial light-harvesting antennas, and investigation of protein-protein interactions, the mechanism of FRET has been intensively studied by monitoring its excited-state dynamics via various spectroscopic techniques. The utilized electron tomography technique allowed the direct localization of 3D coordinates of individual QDs in self-assembled nanostructures and theoretical estimation of the FRET efficiency of a single fluorophore, domain, or supramolecular assembly. Moreover, the experimental value of the FRET efficiency determined by fluorescence spectroscopy was in good agreement with the magnitude obtained via electron tomography. We believe that the described strategy can be used in single-molecule FRET studies and will help to create a new bridge between material science and molecular/supramolecular photochemistry.
机译:这里,我们通过高分辨率电子断层扫描观察它们的三维(3D)配置,在两种不同类型的量子点(QD)超分子组件中提出了对孔谐振能量转移(FRET)的第一个实时调查。由于其在光合作用中的关键作用,人工光收集天线和蛋白质 - 蛋白质相互作用的调查,通过通过各种光谱技术监测其激发状态动态,通过监测其激发状态动态来集中研究。利用的电子断层扫描技术允许单个QDS中的3D坐标直接定位在自组装的纳米结构中,以及单个荧光团,域或超分子组装的尺寸效率的理论估计。此外,荧光光谱法测定的FRET效率的实验值与通过电子断层扫描获得的幅度吻合良好。我们认为,所描述的策略可用于单分子FRET研究,并有助于在材料科学和分子/超分子光化学之间创建新的桥梁。

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