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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

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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).
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Atomic Emission Spectroscopy: Instrumentation01:22

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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.
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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 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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Atomic Fluorescence Spectroscopy01:29

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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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Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
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Autonomous micro-focus angle-resolved photoemission spectroscopy.

Steinn Ýmir Ágústsson1, Alfred J H Jones1, Davide Curcio1

  • 1Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark.

The Review of Scientific Instruments
|May 8, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces an autonomous search protocol for angle-resolved photoemission spectroscopy (ARPES), significantly speeding up the mapping of electronic structures in solids by intelligently navigating k- and real-space.

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Area of Science:

  • Solid-state physics
  • Materials science
  • Surface science

Background:

  • Angle-resolved photoemission spectroscopy (ARPES) is crucial for mapping the electronic structure of solids.
  • Advancements in X-ray optics have enabled ARPES as a microscopic tool for spatial mapping.
  • Traditional ARPES involves time-consuming scanning across energy-momentum and surface spaces.

Purpose of the Study:

  • To develop an autonomous protocol for efficient ARPES data acquisition.
  • To enable intelligent searching in both k-space and real-space for regions of interest.
  • To overcome the limitations of conventional time-consuming scanning methods.

Main Methods:

  • Implementation of an autonomous search protocol using Gaussian process regression.
  • Simultaneous optimization of k-space and real-space exploration.
  • Application of the protocol on the SGM4 micro-focus beamline at ASTRID2.

Main Results:

  • Successful autonomous navigation to identify areas with high photoemission intensity or sharp spectral features.
  • Demonstration of an efficient method to search for specific electronic properties.
  • The protocol is adaptable for additional parameters and optimization criteria.

Conclusions:

  • The developed autonomous search protocol significantly enhances the efficiency of ARPES experiments.
  • This method allows for rapid identification of key electronic features, saving experimental time.
  • Autonomous experimental control represents a major advancement in ARPES capabilities.