Sub-micron thick liquid sheets produced by isotropically etched glass nozzles
Lab on a Chip, 2022•pubs.rsc.org
We report on the design and testing of glass nozzles used to produce liquid sheets. The
sheet nozzles use a single converging channel chemically etched into glass wafers by
standard lithographic methods. Operation in ambient air and vacuum was demonstrated.
The measured sheet thickness ranges over one order of magnitude with the smallest
thickness of 250 nm and the largest of 2.5 μm. Sheet thickness was shown to be
independent of liquid flow rate, and dependent on the nozzle outlet area. Sheet surface …
sheet nozzles use a single converging channel chemically etched into glass wafers by
standard lithographic methods. Operation in ambient air and vacuum was demonstrated.
The measured sheet thickness ranges over one order of magnitude with the smallest
thickness of 250 nm and the largest of 2.5 μm. Sheet thickness was shown to be
independent of liquid flow rate, and dependent on the nozzle outlet area. Sheet surface …
We report on the design and testing of glass nozzles used to produce liquid sheets. The sheet nozzles use a single converging channel chemically etched into glass wafers by standard lithographic methods. Operation in ambient air and vacuum was demonstrated. The measured sheet thickness ranges over one order of magnitude with the smallest thickness of 250 nm and the largest of 2.5 μm. Sheet thickness was shown to be independent of liquid flow rate, and dependent on the nozzle outlet area. Sheet surface roughness was dependent on nozzle surface finish and was on the order of 10 nm for polished nozzles. Electron transmission data is presented for various sheet thicknesses near the MeV mean free path and the charge pair distribution function for D2O is determined from electron scattering data.
The Royal Society of Chemistry
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