Observation of the density minimum in deeply supercooled confined water

Dazhi Liu; Yang Zhang; Chia G. Chen; Chung Yuan Mou; Peter H. Poole; Sow Hsin Chen

doi:10.1073/pnas.0701352104

Observation of the density minimum in deeply supercooled confined water

Dazhi Liu, Yang Zhang, Chia G. Chen, Chung Yuan Mou, Peter H. Poole, Sow Hsin Chen

Research output: Contribution to journal › Article › peer-review

Abstract

Small angle neutron scattering (SANS) is used to measure the density of heavy water contained in 1D cylindrical pores of mesoporous silica material MCM-41-S-15, with pores of diameter of 15 ± 1 Å. In these pores the homogenous nucleation process of bulk water at 235 K does not occur, and the liquid can be supercooled down to at least 160 K. The analysis of SANS data allows us to determine the absolute value of the density of D₂O as a function of temperature. We observe a density minimum at 210 ± 5 K with a value of 1.041 ± 0.003 g/cm³. We show that the results are consistent with the predictions of molecular dynamics simulations of supercooled bulk water. Here we present an experimental report of the existence of the density minimum in supercooled water, which has not been described previously.

Original language	English (US)
Pages (from-to)	9570-9574
Number of pages	5
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	104
Issue number	23
DOIs	https://doi.org/10.1073/pnas.0701352104
State	Published - Jun 5 2007
Externally published	Yes

Keywords

Liquid-liquid critical point
Nanopores
Small angle neutron scattering
Widom line

ASJC Scopus subject areas

General

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10.1073/pnas.0701352104

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title = "Observation of the density minimum in deeply supercooled confined water",

abstract = "Small angle neutron scattering (SANS) is used to measure the density of heavy water contained in 1D cylindrical pores of mesoporous silica material MCM-41-S-15, with pores of diameter of 15 ± 1 {\AA}. In these pores the homogenous nucleation process of bulk water at 235 K does not occur, and the liquid can be supercooled down to at least 160 K. The analysis of SANS data allows us to determine the absolute value of the density of D2O as a function of temperature. We observe a density minimum at 210 ± 5 K with a value of 1.041 ± 0.003 g/cm3. We show that the results are consistent with the predictions of molecular dynamics simulations of supercooled bulk water. Here we present an experimental report of the existence of the density minimum in supercooled water, which has not been described previously.",

keywords = "Liquid-liquid critical point, Nanopores, Small angle neutron scattering, Widom line",

author = "Dazhi Liu and Yang Zhang and Chen, {Chia G.} and Mou, {Chung Yuan} and Poole, {Peter H.} and Chen, {Sow Hsin}",

year = "2007",

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doi = "10.1073/pnas.0701352104",

language = "English (US)",

volume = "104",

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TY - JOUR

T1 - Observation of the density minimum in deeply supercooled confined water

AU - Liu, Dazhi

AU - Zhang, Yang

AU - Chen, Chia G.

AU - Mou, Chung Yuan

AU - Poole, Peter H.

AU - Chen, Sow Hsin

PY - 2007/6/5

Y1 - 2007/6/5

N2 - Small angle neutron scattering (SANS) is used to measure the density of heavy water contained in 1D cylindrical pores of mesoporous silica material MCM-41-S-15, with pores of diameter of 15 ± 1 Å. In these pores the homogenous nucleation process of bulk water at 235 K does not occur, and the liquid can be supercooled down to at least 160 K. The analysis of SANS data allows us to determine the absolute value of the density of D2O as a function of temperature. We observe a density minimum at 210 ± 5 K with a value of 1.041 ± 0.003 g/cm3. We show that the results are consistent with the predictions of molecular dynamics simulations of supercooled bulk water. Here we present an experimental report of the existence of the density minimum in supercooled water, which has not been described previously.

AB - Small angle neutron scattering (SANS) is used to measure the density of heavy water contained in 1D cylindrical pores of mesoporous silica material MCM-41-S-15, with pores of diameter of 15 ± 1 Å. In these pores the homogenous nucleation process of bulk water at 235 K does not occur, and the liquid can be supercooled down to at least 160 K. The analysis of SANS data allows us to determine the absolute value of the density of D2O as a function of temperature. We observe a density minimum at 210 ± 5 K with a value of 1.041 ± 0.003 g/cm3. We show that the results are consistent with the predictions of molecular dynamics simulations of supercooled bulk water. Here we present an experimental report of the existence of the density minimum in supercooled water, which has not been described previously.

KW - Liquid-liquid critical point

KW - Nanopores

KW - Small angle neutron scattering

KW - Widom line

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JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

SN - 0027-8424

IS - 23

ER -

Observation of the density minimum in deeply supercooled confined water

Abstract

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ASJC Scopus subject areas

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