Energy Dispersive Spectroscopy
Energy Dispersive Spectroscopy - Related Videos
10:00
Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles
0 Views •
Cited by 11 •
2016
The use of energy dispersive X-ray tomography in the scanning transmission electron microscope to characterize elemental distributions within single nanoparticles in three dimensions is described.
09:35
Dispersion of Nanomaterials in Aqueous Media: Towards Protocol Optimization
0 Views •
Cited by 71 •
2017
Here, we present a step-wise protocol for the dispersion of nanomaterials in aqueous media with real-time characterization to identify the optimal sonication conditions, intensity, and duration for improved stability and uniformity of nanoparticle dispersions without impacting the sample integrity.
08:53
Dependence of Laser-induced Breakdown Spectroscopy Results on Pulse Energies and Timing Parameters Using Soil Simulants
0 Views •
Cited by 3 •
2013
LIBS detection capabilities on soil simulants were tested using a range of pulse energies and timing parameters. Calibration curves were used to determine detection limits and sensitivities for different parameters. Generally, the results showed that there was not a significant reduction in detection capabilities using lower pulse energies and non-gated detection.
09:21
Mössbauer Spectroscopy
0 Views •
2023
Source: Joshua Wofford, Tamara M. Powers, Department of Chemistry, Texas A&M University Mössbauer spectroscopy is a bulk characterization technique that examines the nuclear excitation of an atom by gamma rays in the solid state. The resulting Mössbauer spectrum provides information about the oxidation state, spin state, and electronic environment around the target atom, which, in combination, gives evidence about the electronic structure and ligand arrangement (geometry) of the molecule.
09:20
X-ray Photoelectron Spectroscopy
0 Views •
2023
Source: Faisal Alamgir, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA X-ray photoelectron spectroscopy (XPS) is a technique that measures the elemental composition, empirical formula, chemical state and electronic state of the elements that exist within a material. XPS spectra are obtained by irradiating a material with a beam of X-rays while simultaneously measuring the kinetic energy and number of electrons that escape from the top several...
FAQs
The electron beam creates vacancies in atoms’ inner electron shells. When higher-energy electrons move into those vacancies, the atoms emit X-rays with energies characteristic of the elements present. Measuring these energies allows researchers to distinguish one element from another, so the resulting signal supports qualitative identification within the examined sample region.
Energy identifies which elements contribute to the signal, while X-ray intensity provides information about their relative abundance. This makes EDS useful for semiquantitative composition estimates rather than only producing an elemental list. In chemistry, those estimates can help assess whether a material contains the expected constituents or detectable compositional differences.
A focused beam excites atoms in a selected region of the specimen, connecting the measured X-rays to a particular solid, particle, thin-film area, or interface. This focused analysis helps relate local elemental composition to observed structure. It is especially useful when chemical makeup may vary across different parts of a sample.
Elemental mapping shows how detected elements are distributed across a sample rather than reporting composition from only one location. The spatial pattern can reveal compositional differences among regions, particles, films, or interfaces. In chemistry and materials research, these distributions help connect chemical makeup with structure, performance, impurities, or reaction outcomes.
The specimen is examined in an electron microscope while a focused electron beam excites atoms in the selected region. Emitted X-rays are measured, their energies are interpreted for elemental identity, and signal intensities are used for semiquantitative abundance estimates. The result can be a composition assessment, an impurity check, or a spatial elemental map.
Chemists use EDS when they need elemental information together with electron-microscopy observations of a sample. It can characterize solids, particles, thin films, and interfaces; assess impurities; and compare elemental distributions with structure. The combined information supports studies of materials performance, chemical composition, and changes associated with reaction outcomes.