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Spectroscopic techniques

UV-Vis-NIR spectroscopy is a technique used to examine features of this part (ultra-violet, visible and near infrared) of the light spectrum. Molecules undergo electronic transitions within this part of the light spectrum .

These transitions can be seen as either the presence of fluorescence, phosphorescence or even the absorption of light in or at a specific wavelength or wavelength region. UV-Vis and fluorescence spectroscopy is used as part of a general identification tool used for either general property characterisation or for the analysis of synthetic organic compounds.

ANFF has access to several differing UV-Vis-NIR spectrometers (Varian Cary 3000 and Varian Cary 5000) and several fluorometers (Horiba Fluoromax-4).

Examples of use

  • Use of a fluorescent spin-trap for the monitoring of the degradation of polymers such as polycarbonate and low-density polyethylene,
  • Identification of the band-gap energies of nano-particles to identify their suitability for UV-protection applications,
  • Monitoring of absoption profiles of a compound as a supplementary technique to ascertain whether the use of a UV detector would be suitable in other techniques such as chromatography.

Fabrication step: Characterisation
Function: Surface - thin films
Location: University of Queensland
Node: Queensland