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Super-resolution Fluorescence Microscopy01:37

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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...
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相关实验视频

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Compact Quantum Dots for Single-molecule Imaging
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闪的碳点作为超高分辨率成像探测器

Jayanta Dolai1, Prakash Joshi2, Partha Pratim Mondal2,3

  • 1School of Materials Science, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, India.

ACS applied materials & interfaces
|March 21, 2024
PubMed
概括

这项研究将光碳点 (CD) 作为单分子定位显微镜 (SMLM) 的超高分辨率成像探头. 不同的CD提供了不同的闪特性,使生物成像中的定制应用成为可能.

关键词:
碳碳点点点点点点点点点光闪的光闪的闪光探测器的光探测器纳米颗粒是一种纳米粒子.超高分辨率成像成像技术

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科学领域:

  • 纳米技术纳米技术
  • 生物物理学的生物物理.
  • 材料科学 材料科学 材料科学

背景情况:

  • 单分子定位显微镜 (SMLM) 需要先进的探针进行纳米尺度成像.
  • 开发具有特定光物理性质的探测器对SMLM至关重要.

研究的目的:

  • 为了证明光碳点 (CD) 作为SMLM探针.
  • 为了研究CD组合,眼行为和成像应用之间的关系.

主要方法:

  • 从一个共同的前体中合成红色和绿色的排放性碳点.
  • 光物理性质的表征,包括眼行为.
  • 在SMLM中将CD作为探针用于超分辨率成像的应用.

主要成果:

  • 为SMLM开发了两个不同的光碳点 (红色和绿色).
  • CD显示自发闪,光子数量高,使用周期不同.
  • 红色CD (较低的闪周期) 适用于定量分析;绿色CD (较高的闪周期) 适用于高分辨率成像.
  • 实现了20nm的定位精度和60nm的分辨率.
  • 闪的差异与化学成分和陷状态有关.

结论:

  • 碳点可以被设计为SMLM的多功能探头.
  • 定制CD属性允许各种生物成像应用.
  • 这项工作推进了用于纳米尺度可视化的SMLM探测器开发.