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 language | English (US) |
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Pages (from-to) | 1412-1418 |
Number of pages | 7 |
Journal | Langmuir |
Volume | 33 |
Issue number | 6 |
DOIs | |
State | Published - Feb 14 2017 |
Funding
This work was supported by the US National Science Foundation under Grant No. DMR-1612876. The X-ray diffraction measurements were performed at ChemMatCARS (Sector 15, Advanced Photon Source). ChemMatCARS is supported by the U.S. National Science Foundation under Grant NSF/CHE-1346572. The Advanced Photon Source is supported by the U.S. Department of Energy under Contract DE-AC02-06CH11357.
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Surfaces and Interfaces
- Spectroscopy
- Electrochemistry