A versatile optical microscope for time-dependent single-molecule and single-particle spectroscopy.

A versatile optical microscope for time-dependent single-molecule and single-particle spectroscopy.
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一款多功能光学显微镜,用于分析随时间变化的单分子和单粒子光谱。

DOI:
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发表时间:
2018
影响因子:
4.4
通讯作者:
Haw Yang
Haw Yang
中科院分区:
化学2区
文献类型:
--
作者:
Hao Li;Haw Yang

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本工作报告的设计和实施的多功能光学显微镜的单分子和单纳米粒子的时间依赖光谱。它将现在常规的单目标测量集成到一个独立的平台中,因此在不同类型的样品或光谱模式之间切换时不需要重新配置。照明模式包括通过全内反射的倏逝场照明、暗场照明和落射激发到适合于共焦检测的衍射限制点上。探测模式包括光谱分辨线成像、具有双色能力的宽视场成像和双色单元素光子计数探测。不同光谱和数据采集模式之间的切换是完全自动化的,并通过计算机编程执行。这种显微镜的能力是通过选定的原理验证实验证明。
This work reports the design and implementation of a multi-function optical microscope for time-dependent spectroscopy on single molecules and single nanoparticles. It integrates the now-routine single-object measurements into one standalone platform so that no reconfiguration is needed when switching between different types of sample or spectroscopy modes. The illumination modes include evanescent field through total internal reflection, dark-field illumination, and epi-excitation onto a diffraction-limited spot suitable for confocal detection. The detection modes include spectrally resolved line imaging, wide-field imaging with dual-color capability, and two-color single-element photon-counting detection. The switch between different spectroscopy and data acquisition modes is fully automated and executed through computer programming. The capability of this microscope is demonstrated through selected proof-of-principle experiments.
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