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相关概念视频

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

151
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....
151
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

146
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
146
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

124
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
124
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

537
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
537
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

264
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.
264
Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

520
The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
520

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相关实验视频

Updated: May 11, 2025

Rapid Scan Electron Paramagnetic Resonance Opens New Avenues for Imaging Physiologically Important Parameters In Vivo
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使用钻石传感器进行并行加速电子偏磁共振光谱.

Zhehua Huang1,2, Zhengze Zhao1,2, Fei Kong1,2,3

  • 1University of Science and Technology of China, CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences, Hefei 230026, China.

Physical review letters
|April 18, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的零场电子磁共振 (EPR) 方法,使用空 (NV) 中心. 这种技术克服了传感器和目标不均性,用于敏感的磁传感和实时自由基监测.

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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
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Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
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Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures

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相关实验视频

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Rapid Scan Electron Paramagnetic Resonance Opens New Avenues for Imaging Physiologically Important Parameters In Vivo
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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
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科学领域:

  • 量子传感器是一种量子传感器.
  • 磁共振光谱学 磁共振光谱学
  • 材料科学 材料科学 材料科学

背景情况:

  • 钻石中的空 (NV) 中心是原子级磁传感器.
  • NV中心提供高磁场灵敏度用于电子磁共振 (EPR) 测量.
  • 现有的NV组合EPR方法存在传感器和目标不均性,限制了光谱分辨率.

研究的目的:

  • 开发一种新型的EPR光谱法,能够对传感器和目标不均性产生强大影响.
  • 提高使用NV集的EPR测量的效率和分辨率.
  • 为了实时监测自由基的动态.

主要方法:

  • 在零磁场下实施交叉放松EPR光谱学.
  • 使用振幅调节的控制场来调整NV传感器共振.
  • 与大约3万个NV中心的合奏进行演示.

主要成果:

  • 通过调制实现了强大的EPR检测,尽管传感器不均.
  • 零场EPR本质上补偿了目标不均性.
  • 成功获得了自由基的明确的EPR光谱.
  • 证明了光谱动态的实时监测.

结论:

  • 开发的交叉放松EPR方法显著提高了灵敏度和稳定性.
  • 这种技术克服了传统NV合并EPR光谱学的局限性.
  • 能够用于研究自由基和动态过程的先进应用.