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UV–Vis Spectrometers01:14

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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.
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Enabling solid sample analysis in liquid spectrophotometers with a 3D-printed cuvette.

Jacques Doumani1, Henry Mansfield1, Andrey Baydin1,2,3

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Researchers developed affordable 3D-printed cuvettes for spectroscopy, enabling liquid and solid sample analysis in UV-VIS and CD instruments. This innovation expands experimental capabilities at a low cost.

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Area of Science:

  • Spectroscopy
  • Materials Science
  • 3D Printing

Background:

  • Commercial spectroscopy instruments primarily support liquid samples.
  • Adapters for solid samples are often costly or unavailable.
  • A need exists for versatile cuvettes for both liquid and solid analyses.

Purpose of the Study:

  • To design and fabricate low-cost 3D-printed cuvettes for solid sample analysis.
  • To enable measurements of both liquid and solid samples using a single spectroscopy system.
  • To demonstrate the utility of these cuvettes in UV-VIS and circular dichroism (CD) spectroscopy.

Main Methods:

  • 3D printing (fused deposition modeling and stereolithography) was used to fabricate cuvette prototypes.
  • Two cuvette versions were created: one for fixed orientation and one for rotation.
  • The cuvettes were tested in standard commercial spectroscopy instruments.

Main Results:

  • Successfully fabricated functional 3D-printed cuvettes for spectroscopy.
  • Demonstrated the capability to measure optical properties of solid samples, specifically aligned carbon nanotube films.
  • Achieved successful UV-VIS and CD spectroscopy measurements using the 3D-printed cuvettes.

Conclusions:

  • 3D-printed cuvettes offer a cost-effective solution for analyzing solid samples in spectroscopy.
  • These adapters enhance the versatility of existing commercial spectroscopy systems.
  • The developed cuvettes facilitate a broader range of low-cost optical property studies.