Homogeneous nucleation of supersaturated KCl-solutions from single levitated microdroplets

Literature Information

Publication Date 2004-05-06
DOI 10.1039/B401807A
Impact Factor 3.676
Authors

B. Berge, W. Mikosch, E. Rühl


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Abstract

Single levitated microdroplets of aqueous potassium chloride (KCl) solutions are investigated as a function of temperature and humidity of their surroundings. Supersaturated solution droplets are obtained from the evaporation of water. The phase transition into solid microparticles is investigated as a function of temperature and humidity, where the experimental conditions favor homogeneous nucleation. The heat of solution of supersaturated KCl-solution droplets containing variable salt concentrations is derived, which is compared to previous results on dilute and saturated KCl-solutions. It is found to be negative, contrary to saturated and dilute solutions. This gives evidence for the formation of KCl clusters in supersaturated solutions prior to nucleation. The rates of homogeneous nucleation from supersaturated KCl solutions are reported, where the temporal evolution of homogeneous nucleation is investigated. Processes occurring on different time scales are identified. These are discussed along with previous works on homogeneous nucleation of pure water and salt solutions.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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