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Related Concept Videos

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for electronic transitions. As a result...
UV–Vis Spectrum01:30

UV–Vis Spectrum

When light passes through a substance, a portion of the light is absorbed while the remaining light is reflected or transmitted. If the molecule absorbs light between the wavelengths of 180–400 nm range, the UV spectrum is obtained, and if it absorbs light in the 400–780 nm wavelength range, the visible spectrum is obtained.     
The UV–Vis spectrum of a molecule is the plot of its absorbance versus wavelength. The plot is drawn by taking molar absorptivity (ε) or log ε on the y-axis (ordinate)...
UV–Vis Spectroscopy of Conjugated Systems01:32

UV–Vis Spectroscopy of Conjugated Systems

Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in the...
Atomic Absorption Spectroscopy: Atomization Methods01:25

Atomic Absorption Spectroscopy: Atomization Methods

Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the aerosol...
Preparation of Samples for Electron Microscopy01:20

Preparation of Samples for Electron Microscopy

To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...

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Related Experiment Video

Updated: Jul 7, 2026

Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition
06:30

Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition

Published on: August 29, 2017

Highly absorptive coating for the vacuum ultraviolet range.

K A Moldosanov1, M A Samsonov, L S Kim

  • 1Special Design Office OKB Aalam, 89 Shopokova Street, Bishkek 720021, Kyrgystan.

Applied Optics
|February 13, 2008
PubMed
Summary
This summary is machine-generated.

New vacuum UV coatings offer superior light absorption and mechanical robustness. These advanced materials utilize dual-scale granularity for enhanced performance in the ultraviolet spectrum.

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Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet (VUV) Synchrotron Radiation
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Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet (VUV) Synchrotron Radiation

Published on: October 30, 2012

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Last Updated: Jul 7, 2026

Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition
06:30

Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition

Published on: August 29, 2017

Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet (VUV) Synchrotron Radiation
09:53

Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet (VUV) Synchrotron Radiation

Published on: October 30, 2012

Area of Science:

  • Materials Science
  • Optics
  • Surface Science

Background:

  • Developing highly absorptive coatings for vacuum ultraviolet (VUV) applications is crucial for various scientific instruments.
  • Existing VUV coatings often lack sufficient absorption or mechanical durability.
  • Understanding the relationship between coating structure and optical properties is essential.

Purpose of the Study:

  • To develop and characterize novel, highly absorptive coatings for the vacuum UV wavelength range.
  • To evaluate the optical performance and mechanical properties of these new coatings.
  • To compare the performance of the new coatings against existing VUV coating technologies.

Main Methods:

  • Fabrication of coatings with dual-scale granularity: large (10-100 µm) light traps and submicrometer structures.
  • Measurement of total hemispherical reflectivity at normal incidence (121.6 nm) and grazing incidence (17.1, 30.4, 58.4, 121.6 nm).
  • Comparative analysis of reflectivity data against established VUV coating materials.

Main Results:

  • The new coatings exhibit significantly high absorption across the VUV spectrum.
  • Dual-scale granularity effectively enhances light trapping capabilities.
  • Measurements confirm superior absorption compared to many state-of-the-art VUV coatings.
  • The novel coatings demonstrate excellent mechanical robustness, a key advantage over conventional materials.

Conclusions:

  • The developed dual-scale granular coatings represent a significant advancement in VUV absorptive materials.
  • These coatings offer a promising solution for applications requiring high VUV absorption and durability.
  • The findings pave the way for improved performance in VUV instrumentation and related fields.