用FRET调制的多杂交纳米粒子用于光度均等的单波长条形码.
Chi Chen1, Ben Corry2, Liang Huang3
1NanoBioPhotonics (nanofret.com), Institute for Integrative Biology of the Cell (I2BC) , Université Paris-Saclay, Université Paris-Sud , CNRS, CEA, 91405 Orsay Cedex , France.
Journal of the American Chemical Society
|June 29, 2019
概括
半导体量子点 (QDs) 实现了多功能福斯特共振能量传输 (FRET) 网络. 这项研究分析了多捐赠者-QD-多接受器系统,使微珠区分的光学条形码成为可能.
科学领域:
- 纳米技术 纳米技术
- 光物理学的光学物理学
- 生物医学工程 生物医学工程
背景情况:
- 半导体量子点 (QD) 是用于弗斯特共振能量转移 (FRET) 的高度通用的光体.
- 在QD上的多捐体多受体FRET网络对于先进的光传感和成像至关重要.
- 对这些复杂的FRET系统的全面理解仍在发展.
研究的目的:
- 提供多捐赠者-QD-多接受器FRET系统的整体光物理分析.
- 调查涉及复合体 (Tb) 捐赠者和附在QD上的Cy5.5染料受体的FRET通路.
- 探索这些系统在光学条形码和光显微镜中的应用.
主要方法:
- 使用时间分辨率和稳定状态光发光学 (PL) 光谱.
- 采用蒙特卡洛模拟来进行全面分析.
- 通过分析Tb,QD和Cy5.5 PL信号来研究FRET通路.
主要成果:
- 实验和模拟结果显示出极好的一致性.
- 成功解开了 hetero-FRET,homo-FRET 和染料二分化中的贡献.
- 证明了PL强度 (通过Tb捐赠者) 和PL寿命 (通过Cy5.5接受者) 的独立调整.
结论:
- 开发了亮度均的Tb-QD-Cy5.5结合剂,具有可调节的光学特性.
- 应用这些合物用于光学条形码,使用RGB比率进行微珠区分.
- 在标准光显微镜中展示了直接适用性,具有单波长激发和检测.
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