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相关概念视频

Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

1.2K
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.
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Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

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An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
1.6K
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

2.3K
Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
2.3K
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

666
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....
666
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

572
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...
572
Mass Analyzers: Overview01:13

Mass Analyzers: Overview

1.6K
The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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迷你混沌辅助光谱仪 迷你混沌辅助光谱仪

Yujia Zhang1, Chaojun Xu1, Zhenyu Zhao1

  • 1State Key Laboratory of Photonics and Communications, School of Information and Electronic Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.

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这项研究将光学混乱引入计算光谱仪,提高性能. 这种新的方法在一个超紧的低功耗设备中实现了高分辨率的频谱分析.

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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.
  • 计算成像技术的成像

背景情况:

  • 计算光谱仪整合了用于芯片上或现场分析的计算技术.
  • 现有的系统在光谱响应方面面临限制,影响分辨率,带宽和足迹.
  • 需要先进的方法来优化紧光谱仪设计中的光学特性.

研究的目的:

  • 通过空腔变形引入光学混乱,以改善频谱操纵.
  • 为了解决当前计算光谱仪在分辨率,带宽和足迹方面的局限性.
  • 为了提高光谱仪性能,利用高空间和光谱复杂性.

主要方法:

  • 利用腔体变形来诱导光学混乱来进行频谱操纵.
  • 采用单一的混沌腔产生多样化的光谱反应.
  • 专注于实现高通道装饰关系和最佳光谱重建.

主要成果:

  • 实现了晚上10点的通道设计关系和100纳米带宽的最佳重建.
  • 展示了20 × 22 μm2.2的超紧的足迹.
  • 报告的超低功耗为16.5mW.

结论:

  • 开发的混乱空腔方法显著提高了芯片上的光谱仪性能.
  • 这种方法提供了最先进的分辨率,带宽和足迹指标.
  • 该技术有可能改变计算光谱仪生态系统.