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3D-printed slit nozzles for Fourier transform microwave spectroscopy
Christopher T Dewberry1, Rebecca B Mackenzie1, Susan Green2
1Department of Chemistry, University of Minnesota, 207 Pleasant St., SE, Minneapolis, Minnesota 55455, USA.
The Review of Scientific Instruments
|July 3, 2015
Summary
3D printing enables low-cost supersonic nozzle fabrication for optimized experimental performance. A novel slit nozzle design significantly improved signal-to-noise ratios in microwave spectroscopy experiments.
Area of Science:
- Physical Chemistry
- Spectroscopy
- Engineering
Background:
- 3D printing technology offers novel fabrication methods.
- Supersonic nozzles are crucial for various experimental setups.
- Fourier transform microwave spectroscopy requires efficient gas delivery.
Purpose of the Study:
- To apply 3D printing for designing and constructing supersonic nozzles.
- To assess the performance of 3D-printed nozzles in spectroscopic experiments.
- To explore novel nozzle geometries for enhanced signal detection.
Main Methods:
- Fabrication of supersonic nozzles using 3D printing at low cost.
- Utilizing a Fourier transform microwave spectrometer with cavity and chirped-pulse capabilities.
- Analyzing rotational spectra of carbonyl sulfide (OCS) and Ar-OCS using different nozzle designs.
Main Results:
- A novel slit nozzle geometry, not previously used with FT-MW spectrometers, was developed.
- The slit nozzle increased the signal-to-noise ratio for OCS by 3-4 times compared to a standard circular nozzle.
- Gains for Ar-OCS complexes were marginal, indicating potential for further optimization.
Conclusions:
- 3D printing provides a cost-effective and rapid method for supersonic nozzle development.
- Novel nozzle geometries can significantly enhance spectroscopic signal detection.
- Further research into nozzle design optimization is warranted for improved experimental outcomes.
