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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
Variables Affecting Phosphorescence and Fluorescence01:26

Variables Affecting Phosphorescence and Fluorescence

Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
Total Internal Reflection Fluorescence Microscopy01:05

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.

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Related Experiment Video

Updated: Jul 7, 2026

Isolation of Quartz Grains for Optically Stimulated Luminescence (OSL) Dating of Quaternary Sediments for Paleoenvironmental Research
09:41

Isolation of Quartz Grains for Optically Stimulated Luminescence (OSL) Dating of Quaternary Sediments for Paleoenvironmental Research

Published on: August 2, 2021

Luminescence database I--minerals and materials.

Colin M MacRae1, Nicholas C Wilson

  • 1CSIRO Minerals, Microbeam Laboratory, Bayview Avenue, Clayton, Victoria 3168, Australia. colin.macrae@csiro.au

Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada
|March 4, 2008
PubMed
Summary

A new luminescence database compiles spectral data for minerals and materials. This resource aids in analyzing ionic species using various excitation techniques, enhancing material chemistry insights.

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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

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Last Updated: Jul 7, 2026

Isolation of Quartz Grains for Optically Stimulated Luminescence (OSL) Dating of Quaternary Sediments for Paleoenvironmental Research
09:41

Isolation of Quartz Grains for Optically Stimulated Luminescence (OSL) Dating of Quaternary Sediments for Paleoenvironmental Research

Published on: August 2, 2021

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
10:12

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

Area of Science:

  • Geochemistry, Materials Science, Analytical Chemistry

Background:

  • Luminescence spectroscopy is crucial for characterizing minerals and materials.
  • Existing data is fragmented, hindering comprehensive analysis of ionic species.

Purpose of the Study:

  • To create a centralized, literature-based database of luminescence spectral data.
  • To facilitate the analysis of luminescence spectra from ionic species in diverse materials.
  • To integrate luminescence data with traditional X-ray measurements for deeper chemical insights.

Main Methods:

  • Compiled data from scientific literature on luminescence.
  • Included spectral information from cathodoluminescence, ion luminescence, and photoluminescence techniques.
  • Recorded major and minor spectral lines and their corresponding activators.

Main Results:

  • A comprehensive database of luminescence spectral data for minerals and materials has been established.
  • The database covers multiple excitation techniques and identifies key spectral features and activators.
  • The compiled data is designed for integration with X-ray analysis.

Conclusions:

  • The luminescence database serves as a valuable resource for researchers in mineralogy and materials science.
  • It enhances the understanding of material chemistry by providing detailed spectral information.
  • Integration with other analytical techniques offers a more holistic approach to material characterization.