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Updated: Oct 12, 2025
08:09
A Technique to Functionalize and Self-assemble Macroscopic Nanoparticle-ligand Monolayer Films onto Template-free Substrates
Published on: May 9, 2014
11.1K
Cation-Ligand Complexation Mediates the Temporal Evolution of Colloidal Fluoride Nanocrystals through Transient
Reut Mashiach1, Haim Weissman1, Liat Avram2
1Department of Molecular Chemistry and Material Science, Weizmann Institute of Science, Rehovot 7610001, Israel.
Nano Letters
|November 23, 2021
Summary
Ligands mediate the transient aggregation of calcium fluoride nanocrystals, controlling their colloidal evolution in water. This understanding is key for designing stable inorganic nanofluorides for diverse applications.
Area of Science:
- Materials Science
- Nanotechnology
- Colloid Chemistry
Background:
- Colloidal inorganic nanofluorides are gaining interest for various applications.
- Advanced synthetic methods accelerate nanofluoride development.
- Understanding colloidal evolution and dispersion factors is crucial for rational design.
Purpose of the Study:
- To elucidate the formation dynamics of nanofluorides in water.
- To investigate the role of ligand-cation interactions in colloidal evolution.
- To understand the transient aggregative phase during nanofluoride formation.
Main Methods:
- Utilized a multimodal in situ approach.
- Combined dynamic light scattering (DLS), nuclear magnetic resonance (NMR), and cryogenic-transmission electron microscopy (cryo-TEM).
Main Results:
- Elucidated nanofluoride formation dynamics via a transient aggregative phase.
- Demonstrated ligand-cation interactions mediating transient aggregation of CaF2 nanocrystals (NCs).
- Showed that this aggregation governs the kinetics of colloidal evolution.
Conclusions:
- Key stages of CaF2 NCs dispersion in water were identified.
- Fundamental aspects of nanofluoride formation mechanisms were highlighted.
- Ligands play a crucial role beyond surfactants, mediating colloidal evolution by complexing cationic precursors, important for designing other NCs.
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