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Solution electrostatic levitator for measuring surface properties and bulk structures of an extremely supersaturated
Sooheyong Lee1, Wonhyuk Jo1, Yong Chan Cho1
1Center for Creative Convergence Research, Korea Research Institute of Standards and Science (KRISS), Daejeon 305-600, South Korea.
The Review of Scientific Instruments
|June 3, 2017
Summary
This study introduces a novel electrostatic levitation apparatus for studying highly supersaturated solutions. The new method enables precise measurements of surface and bulk properties, revealing cluster polymerization during dehydration.
Area of Science:
- Physical Chemistry
- Materials Science
- Solution Chemistry
Background:
- Characterizing highly supersaturated solutions is challenging due to premature crystallization.
- Heterogeneous nucleation sites often interfere with accurate measurements.
- Studying solutions beyond their metastable zone width limit requires advanced techniques.
Purpose of the Study:
- To develop and demonstrate an integrated apparatus for measuring properties of highly supersaturated solutions.
- To investigate the surface and bulk structural evolution of solutions beyond the metastable zone.
- To explore the behavior of potassium dihydrogen phosphate (KH2PO4) aqueous solutions under extreme conditions.
Main Methods:
- Combining electrostatic levitation with real-time laser and X-ray scattering.
- Simultaneous measurement of droplet drying kinetics and surface tension.
- Analysis of bulk structural evolution in highly concentrated solutions.
Main Results:
- The study successfully measured surface tension and drying kinetics of a KH2PO4 droplet.
- Observed significant changes in surface properties correlated with cluster polymerization.
- Demonstrated the capability to study solutions deep within the metastable state.
Conclusions:
- The novel electrostatic levitation apparatus enables unprecedented characterization of highly supersaturated solutions.
- Surface property changes are linked to the polymerization of hydrated monomer clusters.
- This technique is effective for a broad range of concentrated solutions and liquids in deep metastable states.
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