Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 88, Issue 5, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4982363
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Funding
- Converging Research Center Program through the Ministry of Science, ICT and Future Planning, Korea [NRF-2014M3C1A8048818, NRF-2014M1A7A1A01030128, NRF-2016K1A3A7A09005386]
- National Research Foundation of Korea [2014M1A7A1A01030136, 2016K1A3A7A09005386, PAL-2017] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We report on the first integrated apparatus for measuring surface and thermophysical properties and bulk structures of a highly supersaturated solution by combining electrostatic levitation with real-time laser/x-ray scattering. Even today, a proper characterization of supersaturated solutions far above their solubility limits is extremely challenging because heterogeneous nucleation sites such as container walls or impurities readily initiate crystallization before the measurements can be performed. In this work, we demonstrate simultaneous measurements of drying kinetics and surface tension of a potassium dihydrogen phosphate (KH2PO4) aqueous solution droplet and its bulk structural evolution beyond the metastable zone width limit. Our experimental finding shows that the noticeable changes of the surface properties are accompanied by polymerizations of hydrated monomer clusters. The novel electrostatic levitation apparatus presented here provides an effective means for studying a wide range of highly concentrated solutions and liquids in deep metastable states. (C) 2017 Author(s).
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