Water-induced correlation between single ions imaged at the solid-liquid interface

M. Ricci, P. Spijker, K. Voitchovsky

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

91 Sitaatiot (Scopus)
125 Lataukset (Pure)

Abstrakti

When immersed into water, most solids develop a surface charge, which is neutralized by an accumulation of dissolved counterions at the interface. Although the density distribution of counterions perpendicular to the interface obeys well-established theories, little is known about counterions’ lateral organization at the surface of the solid. Here we show, by using atomic force microscopy and computer simulations, that single hydrated metal ions can spontaneously form ordered structures at the surface of homogeneous solids in aqueous solutions. The structures are laterally stabilized only by water molecules with no need for specific interactions between the surface and the ions. The mechanism, studied here for several systems, is controlled by the hydration landscape of both the surface and the adsorbed ions. The existence of discrete ion domains could play an important role in interfacial phenomena such as charge transfer, crystal growth, nanoscale self-assembly and colloidal stability.
AlkuperäiskieliEnglanti
Artikkeli4400
Sivut1-8
JulkaisuNature Communications
Vuosikerta5
DOI - pysyväislinkit
TilaJulkaistu - 2014
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Tutkimusalat

  • atomic force microscopy
  • molecular dynamics simulations
  • solid-liquid interfaces

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