Heterogeneous Electrofreezing of Super-Cooled Water on Surfaces of Pyroelectric Crystals is Triggered by Trigonal Planar Ions

Sofia Curland, Christoph Allolio, Leah Javitt, Shiri Dishon Ben-Ami, Isabelle Weissbuch, David Ehre, Daniel Harries, Meir Lahav, Igor Lubomirsky

Research output: Contribution to journalArticle

Abstract

Electrofreezing experiments of super-cooled water (SCW) with different ions, performed directly on the charged hemihedral faces of pyroelectric LiTaO3 and AgI crystals, in the presence and in the absence of pyroelectric charge are reported. It is demonstrated that bicarbonate (HCO3) ions elevate the icing temperature near the positively charged faces. In contrast, the hydronium (H3O+) slightly reduces the icing temperature. Molecular dynamics simulations suggest that the hydrated trigonal planar HCO3 ions self-assemble with water molecules near the surface of the AgI crystal as clusters of slightly different configuration from those of the ice-like hexagons. These clusters, however, have a tendency to serve as embryonic nuclei for ice crystallization. Consequently, we predicted and experimentally confirmed that the trigonal planar ions of NO3 and guanidinium (Gdm+), at appropriate concentrations, elevate the icing temperature near the positive and negative charged surfaces, respectively. On the other hand, the Cl and SO42− ions of different configurations reduce the icing temperature.

Original languageEnglish
Pages (from-to)15705-15709
Number of pages5
JournalAngewandte Chemie
Volume132
Issue number36
DOIs
Publication statusPublished - Sep 1 2020

Keywords

  • electrofreezing
  • ice nucleation
  • ionic charges
  • pyroelectricity

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Heterogeneous Electrofreezing of Super-Cooled Water on Surfaces of Pyroelectric Crystals is Triggered by Trigonal Planar Ions'. Together they form a unique fingerprint.

  • Cite this

    Curland, S., Allolio, C., Javitt, L., Dishon Ben-Ami, S., Weissbuch, I., Ehre, D., Harries, D., Lahav, M., & Lubomirsky, I. (2020). Heterogeneous Electrofreezing of Super-Cooled Water on Surfaces of Pyroelectric Crystals is Triggered by Trigonal Planar Ions. Angewandte Chemie, 132(36), 15705-15709. https://doi.org/10.1002/ange.202006435