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Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

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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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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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Bright focused ion beam sources based on laser-cooled atoms.

J J McClelland1, A V Steele2, B Knuffman2

  • 1Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD 20899.

Applied Physics Reviews
|May 31, 2016
PubMed
Summary

New laser-cooled atom ion sources offer ultra-bright nanoscale focused ion beams (FIBs), rivaling current technology. These advanced FIBs promise significant advancements in nanofabrication and materials analysis.

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Atomic Physics

Background:

  • Nanoscale focused ion beams (FIBs) are crucial for nanofabrication, microscopy, and doping.
  • Existing FIBs, like Ga+ liquid metal ion sources, have limitations.

Purpose of the Study:

  • To review emerging ion beam technology using laser-cooled atoms.
  • To discuss principles, applications, and future potential of these novel FIB sources.

Main Methods:

  • Ionization of laser-cooled neutral atoms to generate ion beams.
  • Characterization of ion beam properties, focusing on brightness and velocity distribution.

Main Results:

  • Laser-cooled ion sources produce beams with extremely high brightness.
  • These sources exhibit very small transverse velocity distributions, surpassing some current standards.
  • Demonstrated applications include low-energy ion microscopy with Li ions.

Conclusions:

  • Laser-cooled atom ion sources represent a significant advancement in FIB technology.
  • The high brightness and controlled beam properties offer new possibilities for nanoscale applications.
  • Rapid evolution and broader adoption of this technology are anticipated.