Two-dimensional crystal growth from undersaturated solutions

Anne E. Murdaugh; Mary Liddelow; Anneliese M. Schmidt; Srinivas Manne

doi:10.1021/la063548d

Two-dimensional crystal growth from undersaturated solutions

Anne E. Murdaugh, Mary Liddelow, Anneliese M. Schmidt, Srinivas Manne

Physics

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

17 Scopus citations

Abstract

The solubility of a substance is commonly understood as the minimum concentration necessary for the condensation of a solid phase from solution. Here we report the nucleation and growth of ionic compounds from aqueous concentrations on the order of 0.1 times the solubility. The condensation is catalyzed by a foreign substrate, and the new phase grows as a crystalline monolayer. Undersaturated growth is observed only in cases where the dissolved compound is isomorphic with the substrate and the interaction strength between a dissolved-ion/substrate-ion pair exceeds that between the two dissolved ions. These results are consistent with a simple model in which favorable ion-surface interactions lead to ion enrichment and supersaturation in the two-dimensional interfacial zone.

Original language	English (US)
Pages (from-to)	5852-5856
Number of pages	5
Journal	Langmuir
Volume	23
Issue number	11
DOIs	https://doi.org/10.1021/la063548d
State	Published - May 22 2007

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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AU - Murdaugh, Anne E.

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AU - Schmidt, Anneliese M.

AU - Manne, Srinivas

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N2 - The solubility of a substance is commonly understood as the minimum concentration necessary for the condensation of a solid phase from solution. Here we report the nucleation and growth of ionic compounds from aqueous concentrations on the order of 0.1 times the solubility. The condensation is catalyzed by a foreign substrate, and the new phase grows as a crystalline monolayer. Undersaturated growth is observed only in cases where the dissolved compound is isomorphic with the substrate and the interaction strength between a dissolved-ion/substrate-ion pair exceeds that between the two dissolved ions. These results are consistent with a simple model in which favorable ion-surface interactions lead to ion enrichment and supersaturation in the two-dimensional interfacial zone.

AB - The solubility of a substance is commonly understood as the minimum concentration necessary for the condensation of a solid phase from solution. Here we report the nucleation and growth of ionic compounds from aqueous concentrations on the order of 0.1 times the solubility. The condensation is catalyzed by a foreign substrate, and the new phase grows as a crystalline monolayer. Undersaturated growth is observed only in cases where the dissolved compound is isomorphic with the substrate and the interaction strength between a dissolved-ion/substrate-ion pair exceeds that between the two dissolved ions. These results are consistent with a simple model in which favorable ion-surface interactions lead to ion enrichment and supersaturation in the two-dimensional interfacial zone.

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Two-dimensional crystal growth from undersaturated solutions

Abstract

ASJC Scopus subject areas

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