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Related Concept Videos

Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

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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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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).
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....
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Atomic Emission Spectroscopy: Overview01:20

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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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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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Characterizing Localized Surface Plasmons Using Electron Energy-Loss Spectroscopy.

Charles Cherqui1, Niket Thakkar2, Guoliang Li3

  • 1Department of Chemistry, University of Washington, Seattle, Washington 98195;

Annual Review of Physical Chemistry
|May 25, 2016
PubMed
Summary
This summary is machine-generated.

Electron energy-loss spectroscopy (EELS) provides nanoscale insights into plasmonic metal nanoparticles. This technique correlates high-resolution imaging with detailed spectral information for advanced material analysis.

Keywords:
STEM/EELSelectron energy-loss spectroscopylocalized surface plasmons

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Spectroscopy

Background:

  • Electron energy-loss spectroscopy (EELS) enables visualization of nanoscale properties.
  • Scanning transmission electron microscopy (STEM) coupled with EELS offers subnanometer spatial and high spectral resolution (∼10-100 meV).
  • Plasmonic metal nanoparticles are crucial in diverse scientific and technological fields.

Purpose of the Study:

  • To review the fundamental principles of plasmonics and EELS.
  • To highlight recent experimental applications of EELS in studying plasmonic nanoparticle systems.
  • To underscore the significance of EELS in understanding nanoscale optical and electronic properties.

Main Methods:

  • Utilizing electron energy-loss spectroscopy (EELS) within a scanning transmission electron microscope (STEM).
  • Achieving simultaneous nanoscale imaging and spectroscopic correlation.
  • Employing electron beams for the interrogation of plasmonic systems.

Main Results:

  • Demonstrated capability of EELS for subnanometer spatial resolution imaging.
  • Showcased correlation of nanoscale morphology with electronic and optical properties.
  • Presented successful application in analyzing individual and assembled plasmonic nanoparticles.

Conclusions:

  • EELS is an essential technique for characterizing plasmonic metal nanoparticles.
  • The combination of imaging and spectroscopy provides deep insights into nanoscale phenomena.
  • Recent advancements showcase EELS's power in exploring complex plasmonic systems.