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Updated: Jan 16, 2026

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

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Published on: April 23, 2017

Maintaining Shell Disorder with Kinked or Branched Ligands Stabilizes Apolar Nanoparticles.

Tobias Valentin Knapp¹, Setare Dodange², Debora Monego²

¹INM─Leibniz Institute for New Materials, Campus D2 2, Saarbrücken 66123, Germany.

|September 26, 2025

Summary

Nonlinear ligands enhance nanoparticle stability by preventing ordered packing, maintaining shell disorder. This molecular mechanism significantly increases colloidal dispersion stability across wide temperature ranges.

Keywords:

agglomeration temperature apolar colloidal stability ligand shell ligand structure nanoparticles nonlinear

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Area of Science:

Materials Science
Colloid Science
Nanotechnology

Background:

Stable nanoparticle colloids are crucial for diverse applications.
Nonlinear ligands improve nanoparticle stability in apolar solvents compared to linear chains.

Purpose of the Study:

To elucidate the molecular origin of enhanced colloidal stability conferred by nonlinear ligands.
To understand how ligand structure influences nanoparticle shell ordering and dispersion stability.

Main Methods:

Temperature-dependent X-ray scattering experiments.
Molecular dynamics simulations.
Analysis of ligand shell structure and nanoparticle interactions.

Main Results:

Even single methyl side chains disrupt ligand shell ordering, suppressing disorder-order transitions.
Double bonds or branching in ligands drastically lower agglomeration temperatures.
Ligand disorder prevents ordered bundling, maintaining shell disorder near solvent freezing.
Enhanced stability is attributed to weakened inter-ligand attractions (energetic and entropic factors).

Conclusions:

Structural modifications in ligands (branching, unsaturation) are key to preventing ordered packing.
Disordered ligand shells enhance colloidal stability by over 100 K compared to linear ligands.
Provides a molecular explanation for improved stability with nonlinear ligands, enabling engineered nanoparticle dispersions.