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Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
Published on: August 15, 2018
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The surface charge distribution affects the ice nucleating efficiency of silver iodide
Brittany Glatz1, Sapna Sarupria1
1Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, USA.
The Journal of Chemical Physics
|August 12, 2017
Summary
Surface charge distribution significantly impacts heterogeneous ice nucleation. Positively charged silver iodide surfaces promote ice formation, while negatively charged or in-plane charges hinder it, offering new insights into ice nucleation mechanisms.
Area of Science:
- Atmospheric Chemistry
- Materials Science
- Physical Chemistry
Background:
- Heterogeneous ice nucleation is crucial for ice formation in nature.
- Molecular mechanisms governing surface-induced ice nucleation remain unclear.
Purpose of the Study:
- Investigate the influence of surface charge distribution on ice nucleation rates.
- Understand how modified silver iodide surfaces affect water molecule behavior.
Main Methods:
- Extensive molecular dynamics simulations were performed.
- Simulations focused on ice nucleation near modified silver iodide (AgI) surfaces.
- Surface charge distributions were systematically altered.
Main Results:
- Surface charge distribution significantly affects ice nucleation rates.
- AgI surfaces with positive charges positioned above negative charges promote ice nucleation.
- Ice nucleation is hindered when negative charges are above or in-plane with positive charges.
Conclusions:
- Surface charge distribution is a key factor in heterogeneous ice nucleation.
- Interfacial water molecule orientation explains observed nucleation differences.
- Water molecule orientation distributions can predict ice nucleating propensity.
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