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相关概念视频

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

1.5K
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

296
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
296
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

3.1K
Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for...
3.1K
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

594
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
594
Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

7.6K
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

Updated: Sep 11, 2025

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
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基于形衍射的宽带成像光谱仪,用于极端紫外线源.

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    概括

    我们开发了一种用于极端紫外线 (EUV) 源的新型成像光谱仪,采用独特的格子-托罗伊德-格子设计. 这种无偏差的仪器为先进的科学研究提供了高效率和光谱分辨率.

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    Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet VUV Synchrotron Radiation
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    科学领域:

    • 光学和光子学 在光学和光子学.
    • 频谱学是一种光谱学.
    • 超快速科学 超快速科学

    背景情况:

    • 极端紫外线 (EUV) 光源,特别是那些由高波激光器产生的光源,对于先进的研究至关重要.
    • 当前的成像光谱仪在与EUV源一起使用时,通常面临着分辨率,效率或复杂性的限制.
    • 在EUV范围内,对无偏差,高性能光谱测量工具的需求是显著的.

    研究的目的:

    • 为EUV源引入一种新的成像光谱仪设计.
    • 为了证明拟议的光谱仪的无偏差成像能力.
    • 在效率,光谱分辨率和光谱覆盖率方面评估光谱仪的性能.

    主要方法:

    • 设计和实施一个格子-托罗伊德-格子光谱仪配置.
    • 使用均间隔的平面格子进行光谱分析.
    • 进行详细的偏差分析和数据模拟.
    • 实验验证将理论分析与收集的数据结合起来.

    主要成果:

    • 展示了一种新,简单,有效的格-托罗伊德-格成像光谱仪,用于EUV.
    • 在整个工作波长范围内实现了无偏差的点对点成像.
    • 高流效率,足够的光谱分辨率和广泛的光谱覆盖率的优化组合.
    • 实验数据与理论模拟一致,证实了光谱仪的性能.

    结论:

    • 开发的EUV成像光谱仪代表了光谱测量技术的重大进展.
    • 它的无偏差性能和高效率使其适用于广泛的科学应用.
    • 该光谱仪能够进行超快速的光谱和探测实验,具有很高的时间精度 (从femtosecond到picosecond).