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Related Concept Videos

Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

2.4K
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...
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Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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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.
553
Atomic Fluorescence Spectroscopy01:29

Atomic Fluorescence Spectroscopy

463
Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which...
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Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

221
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...
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Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

244
In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
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Atomic Spectroscopy: Absorption, Emission, and Fluorescence01:23

Atomic Spectroscopy: Absorption, Emission, and Fluorescence

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Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
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Updated: Aug 12, 2025

Preparing a Celadonite Electron Source and Estimating Its Brightness
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Attosecond field emission.

H Y Kim1, M Garg2, S Mandal1

  • 1Institut für Physik, Universität Rostock, Rostock, Germany.

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|January 25, 2023
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Summary
This summary is machine-generated.

Researchers measured attosecond electron pulses emitted from tungsten nanotips using intense light transients. This breakthrough enables real-time observation of electron dynamics for advanced imaging and attosecond physics applications.

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Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
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Area of Science:

  • Attosecond physics
  • Nano-optics
  • Electron emission

Background:

  • Field electron emission is crucial for high-frequency signal processing and atomic-scale imaging.
  • Advancements in electron microscopy require techniques for sub-femtosecond confinement and examination of field emission.
  • Intense laser pulses have achieved femtosecond confinement of optical field emission from nanostructured metals.

Purpose of the Study:

  • To develop techniques for measuring attosecond electron pulses.
  • To investigate the real-time dynamics of optical field emission.
  • To explore nanoscale near fields and electron pulse properties.

Main Methods:

  • Utilized intense, sub-cycle light transients to induce optical field emission from tungsten nanotips.
  • Employed a weak replica of the light transient to probe emission dynamics in real time.
  • Measured temporal properties of rescattered electron pulses, including duration and chirp.

Main Results:

  • Successfully generated and measured attosecond electron pulses with a duration of 53 ± 5 attoseconds.
  • Characterized the chirp of the electron pulses.
  • Provided direct exploration of nanoscale near fields.

Conclusions:

  • The study demonstrates the ability to measure attosecond electron pulses, a long-standing challenge.
  • This technique opens new avenues for research in attosecond physics and nano-optics.
  • Enables unprecedented insights into electron dynamics at the attosecond timescale.