Atomic Number Dependent “Structural Transitions” in Ordered Lanthanide Monolayers: Role of the Hydration Shell

Mitchell Miller, Miaoqi Chu, Binhua Lin, Wei Bu, Pulak Dutta*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

When lanthanide ions are present in the aqueous subphase of a floating monolayer (Langmuir film), the ions attracted to the interface will in many cases form commensurate and/or incommensurate two-dimensional structures. These lattices depend not only on the molecules forming the monolayer, but also on the atomic number of the lanthanide, with a sudden change between the lattice formed by lighter ions and that formed by heavier ions under a given monolayer. Since there are few other relevant differences between the lanthanides, we attribute the Z-dependent “transition” to the number of water molecules associated with each ion. The first hydration shell is thought to vary continuously from ∼9 in lighter lanthanides to ∼8 in heavier lanthanides.

Original languageEnglish (US)
Pages (from-to)1412-1418
Number of pages7
JournalLangmuir
Volume33
Issue number6
DOIs
StatePublished - Feb 14 2017

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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