Measurements in the ultraviolet/visible region (UV-VIS) cover wavelengths from about 200 nm to 800 nm. The absorption of ultraviolet or visible radiation by a molecule leads to transitions among the electronic energy levels of the molecule. It is ideal for characterizing the optical and electronic properties of various materials such as: films, powders, monolithic solids, and liquids.  The near-IR region (NIR) of the electromagnetic spectrum utilizes wavelengths from about 800-2500 nm. The transitions measured in this region are generally related to overtone and combination bands of mid-infrared vibrational modes.

UV-Vis-NIR figure

Optical design of 150 mm integrating sphere. Photo credit: Perkin Elmer

  • Solids, liquids, and powders can be measured with relative ease​
  • Sample size can vary from 2 x 2 mm up to several cm​
  • We can collect data in almost any modality: transmission, diffuse reflection, variable angle specular reflection, and variable angle transmission.

Perkin-Elmer Lambda 950 UV-Vis-NIR Spectrophotometer and Agilent/Cary 7000 with UMA​

Potential users are encouraged to contact the appropriate MCL staff member to discuss potential applications of this technique. If the technique is deemed appropriate, the user will be trained.

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