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Related Concept Videos

Precipitation Gravimetry01:03

Precipitation Gravimetry

Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...

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Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
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Characterization of nickel silicides using EELS-based methods.

E Verleysen1, H Bender, O Richard

  • 1IMEC, Kapeldreef, Leuven, Belgium. eveline.verleysen@imec.be

Journal of Microscopy
|November 6, 2010
PubMed
Summary
This summary is machine-generated.

Electron energy loss spectroscopy (EELS) effectively characterizes nickel silicide phases. Both plasmon peak features and Ni-L edge structure provide unique fingerprints for each Ni-silicide composition.

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Analytical Chemistry

Background:

  • Nickel silicides are crucial in semiconductor technology.
  • Characterizing these phases is essential for device performance.
  • Electron energy loss spectroscopy (EELS) offers high spatial resolution for material analysis.

Purpose of the Study:

  • To characterize various nickel silicide phases using EELS.
  • To establish EELS spectral features as unique identifiers for Ni-silicide compositions.
  • To correlate electronic structure with EELS characteristics.

Main Methods:

  • Quantitative core-loss EELS for elemental composition determination.
  • Low-loss EELS to analyze plasmon peak energy and shape.
  • Ni-L edge energy loss near edge structure (ELNES) analysis.

Main Results:

  • Composition of Ni₃Si, Ni₃₁Si₁₂, Ni₂Si, NiSi, and NiSi₂ determined by core-loss EELS.
  • Plasmon peak energy and shape are characteristic for each Ni-silicide phase.
  • Ni-L edge white line intensity ratios and sums are phase-specific.
  • Correlation between 3d electron occupation and plasmon energy established.

Conclusions:

  • EELS is a powerful tool for identifying and characterizing nickel silicide phases.
  • Spectral features in both low-loss and core-loss EELS provide distinct signatures.
  • Electronic structure, specifically 3d electron occupation, influences EELS spectral properties.