Articles | Volume 11, issue 9
Atmos. Meas. Tech., 11, 5315–5334, 2018
https://doi.org/10.5194/amt-11-5315-2018

Special issue: Fifth International Workshop on Ice Nucleation (FIN) (ACP/AMT...

Atmos. Meas. Tech., 11, 5315–5334, 2018
https://doi.org/10.5194/amt-11-5315-2018

Research article 24 Sep 2018

Research article | 24 Sep 2018

Cleaning up our water: reducing interferences from nonhomogeneous freezing of “pure” water in droplet freezing assays of ice-nucleating particles

Michael Polen et al.

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Latest update: 25 Feb 2021
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Short summary
Ice nucleation commonly studied using droplet freezing measurements suffers from artifacts caused by water impurities or substrate effects. We evaluate a series of substrates and water sources to find methods that reduce the background freezing temperature limit. The best performance was obtained from our new microfluidic device and hydrophobic glass surfaces, using filtered HPLC bottled water. We conclude with recommendations for best practices in droplet freezing experiments and data analysis.