ArticleProceedings of the National Academy of Sciences of the United States of America2015
Formation of surface nanodroplets under controlled flow conditions.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Recent Advances in Reactive Microdroplets for Clean Water and Energy.Advanced materials (Deerfield Beach, Fla.) · 2025Review
- Nanoextraction based on surface nanodroplets for chemical preconcentration and determination.Biomicrofluidics · 2022Review
- Optofluidic flow meter for sub-nanoliter per minute flow measurements.Journal of biomedical optics · 2022Article
- Microfluidic device coupled with total internal reflection microscopy for in situ observation of precipitation.The European physical journal. E, Soft matter · 2021Article
- Extraordinary Focusing Effect of Surface Nanolenses in Total Internal Reflection Mode.ACS central science · 2018Article
- Vapor sublimation and deposition to build porous particles and composites.Nature communications · 2018Article
- Universal nanodroplet branches from confining the Ouzo effect.Proceedings of the National Academy of Sciences of the United States of America · 2017Article
- Solvent Exchange Leading to Nanobubble Nucleation: A Molecular Dynamics Study.Langmuir : the ACS journal of surfaces and colloids · 2017Article
- Robust nanobubble and nanodroplet segmentation in atomic force microscope images using the spherical Hough transform.Beilstein journal of nanotechnology · 2017Article
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Authors and funding
7 authors.
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Abstract
Nanodroplets on a solid surface (i.e., surface nanodroplets) have practical implications for high-throughput chemical and biological analysis, lubrications, laboratory-on-chip devices, and near-field imaging techniques. Oil nanodroplets can be produced on a solid-liquid interface in a simple step of solvent exchange in which a good solvent of oil is displaced by a poor solvent. In this work, we experimentally and theoretically investigate the formation of nanodroplets by the solvent exchange process under well-controlled flow conditions. We find significant effects from the flow rate and the flow geometry on the droplet size. We develop a theoretical framework to account for these effects. The main idea is that the droplet nuclei are exposed to an oil oversaturation pulse during the exchange process. The analysis shows that the volume of the nanodroplets increases with the Peclet number Pe of the flow as ∝ Pe(3/4), which is in good agreement with our experimental results. In addition, at fixed flow rate and thus fixed Peclet number, larger and less homogeneously distributed droplets formed at less-narrow channels, due to convection effects originating from the density difference between the two solutions of the solvent exchange. The understanding from this work provides valuable guidelines for producing surface nanodroplets with desired sizes by controlling the flow conditions.
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