相关实验视频
Updated: Jul 11, 2026

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Fluorescence Lifetime Imaging of Molecular Rotors in Living Cells
Published on: February 9, 2012
概括
在二氧化上测量了罗达6G单分子光寿命. 近场扫描光学显微镜显示,接近探头会改变光衰变,这表明表面附近的火效应.
科学领域:
- * 物理化学 物理化学
- * 光谱学 是一种光谱学.
- * 材料科学 材料科学
背景情况:
- *了解表面的分子行为对于开发先进的光学材料和设备至关重要.
- *光寿命测量提供了对分子电子和环境相互作用的见解.
研究的目的:
- *为了研究单个罗达胺6G分子在二氧化表面上的光寿命.
- * 探索接近近场探测器对分子光衰变动力学影响的影响.
- * 评估近场扫描光学显微镜 (NSOM) 对操纵分子环境和衰变过程的潜力.
主要方法:
- * 用脉冲激光激发进行时间解析的光测量.
- * 时间相关单光子计数 (TCSPC) 用于精确的寿命确定.
- *近场扫描光学显微镜 (NSOM) 实现了局部环境控制和单个分子的探测.
主要成果:
- * 在基板上成功测量了单个罗达胺6G分子的光寿命.
- *观察到光寿命的显著变化取决于分子相对于NSOM探针的位置.
- *观察到光寿命的减少与对金属表面附近激发状态火效应的理论预测相关.
结论:
- * 该研究表明,通过NSOM可控制的局部环境直接影响单分子光寿命.
- *近场相互作用可以诱导分子兴奋状态火,特别是在导电表面附近.
- *NSOM是一种强大的技术,用于重复性操纵分子环境,并研究单个分子水平的衰变动力学.
相关概念视频
Protein Dynamics in Living Cells
Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Super-resolution Fluorescence Microscopy
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.

