Water freezes differently on positively and negatively charged surfaces of pyroelectric materials

David Ehre, Etay Lavert, Meir Lahav, Igor Lubomirsky

Research output: Contribution to journalArticle

124 Citations (Scopus)

Abstract

Although ice melts and water freezes under equilibrium conditions at 0°C, water can be supercooled under homogeneous conditions in a clean environment down to -40°C without freezing. The influence of the electric field on the freezing temperature of supercooled water (electrofreezing) is of topical importance in the living and inanimate worlds. We report that positively charged surfaces of pyroelectric LiTaO3 crystals and SrTiO 3 thin films promote ice nucleation, whereas the same surfaces when negatively charged reduce the freezing temperature. Accordingly, droplets of water cooled down on a negatively charged LiTaO3 surface and remaining liquid at -11°C freeze immediately when this surface is heated to -8°C, as a result of the replacement of the negative surface charge by a positive one. Furthermore, powder x-ray diffraction studies demonstrated that the freezing on the positively charged surface starts at the solid/water interface, whereas on a negatively charged surface, ice nucleation starts at the air/water interface.

Original languageEnglish
Pages (from-to)672-675
Number of pages4
JournalScience
Volume327
Issue number5966
DOIs
Publication statusPublished - Feb 5 2010

Fingerprint

Freezing
Water
Ice
Temperature
Powders
Air
X-Rays
lithium tantalate oxide

ASJC Scopus subject areas

  • General

Cite this

Water freezes differently on positively and negatively charged surfaces of pyroelectric materials. / Ehre, David; Lavert, Etay; Lahav, Meir; Lubomirsky, Igor.

In: Science, Vol. 327, No. 5966, 05.02.2010, p. 672-675.

Research output: Contribution to journalArticle

Ehre, David ; Lavert, Etay ; Lahav, Meir ; Lubomirsky, Igor. / Water freezes differently on positively and negatively charged surfaces of pyroelectric materials. In: Science. 2010 ; Vol. 327, No. 5966. pp. 672-675.
@article{9fc03e9ee8ae4d93ab29450ce1b4f831,
title = "Water freezes differently on positively and negatively charged surfaces of pyroelectric materials",
abstract = "Although ice melts and water freezes under equilibrium conditions at 0°C, water can be supercooled under homogeneous conditions in a clean environment down to -40°C without freezing. The influence of the electric field on the freezing temperature of supercooled water (electrofreezing) is of topical importance in the living and inanimate worlds. We report that positively charged surfaces of pyroelectric LiTaO3 crystals and SrTiO 3 thin films promote ice nucleation, whereas the same surfaces when negatively charged reduce the freezing temperature. Accordingly, droplets of water cooled down on a negatively charged LiTaO3 surface and remaining liquid at -11°C freeze immediately when this surface is heated to -8°C, as a result of the replacement of the negative surface charge by a positive one. Furthermore, powder x-ray diffraction studies demonstrated that the freezing on the positively charged surface starts at the solid/water interface, whereas on a negatively charged surface, ice nucleation starts at the air/water interface.",
author = "David Ehre and Etay Lavert and Meir Lahav and Igor Lubomirsky",
year = "2010",
month = "2",
day = "5",
doi = "10.1126/science.1178085",
language = "English",
volume = "327",
pages = "672--675",
journal = "Science",
issn = "0036-8075",
publisher = "American Association for the Advancement of Science",
number = "5966",

}

TY - JOUR

T1 - Water freezes differently on positively and negatively charged surfaces of pyroelectric materials

AU - Ehre, David

AU - Lavert, Etay

AU - Lahav, Meir

AU - Lubomirsky, Igor

PY - 2010/2/5

Y1 - 2010/2/5

N2 - Although ice melts and water freezes under equilibrium conditions at 0°C, water can be supercooled under homogeneous conditions in a clean environment down to -40°C without freezing. The influence of the electric field on the freezing temperature of supercooled water (electrofreezing) is of topical importance in the living and inanimate worlds. We report that positively charged surfaces of pyroelectric LiTaO3 crystals and SrTiO 3 thin films promote ice nucleation, whereas the same surfaces when negatively charged reduce the freezing temperature. Accordingly, droplets of water cooled down on a negatively charged LiTaO3 surface and remaining liquid at -11°C freeze immediately when this surface is heated to -8°C, as a result of the replacement of the negative surface charge by a positive one. Furthermore, powder x-ray diffraction studies demonstrated that the freezing on the positively charged surface starts at the solid/water interface, whereas on a negatively charged surface, ice nucleation starts at the air/water interface.

AB - Although ice melts and water freezes under equilibrium conditions at 0°C, water can be supercooled under homogeneous conditions in a clean environment down to -40°C without freezing. The influence of the electric field on the freezing temperature of supercooled water (electrofreezing) is of topical importance in the living and inanimate worlds. We report that positively charged surfaces of pyroelectric LiTaO3 crystals and SrTiO 3 thin films promote ice nucleation, whereas the same surfaces when negatively charged reduce the freezing temperature. Accordingly, droplets of water cooled down on a negatively charged LiTaO3 surface and remaining liquid at -11°C freeze immediately when this surface is heated to -8°C, as a result of the replacement of the negative surface charge by a positive one. Furthermore, powder x-ray diffraction studies demonstrated that the freezing on the positively charged surface starts at the solid/water interface, whereas on a negatively charged surface, ice nucleation starts at the air/water interface.

UR - http://www.scopus.com/inward/record.url?scp=76249088256&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=76249088256&partnerID=8YFLogxK

U2 - 10.1126/science.1178085

DO - 10.1126/science.1178085

M3 - Article

C2 - 20133568

AN - SCOPUS:76249088256

VL - 327

SP - 672

EP - 675

JO - Science

JF - Science

SN - 0036-8075

IS - 5966

ER -