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Updated: Jan 13, 2026

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering

Published on: June 1, 2016

Frictional Unlocking and Energy-Controlled Constrained Densification in Nanoparticle Networks.

Nathan Frédéric Gaston Michel Bigan^1,2,3, Jin Wang^4,5, Marc Pascual³

¹Gulliver UMR 7083 CNRS, ESPCI-PSL, 10 rue Vauquelin, 75005 Paris, France.

|October 29, 2025

Summary

This summary is machine-generated.

This study reveals a nanoscale frictional unlocking mechanism in silver nanoparticle networks. Small strains enable reversible particle rearrangements, allowing tunable stiffness and dynamic adaptability in materials.

Keywords:

dynamic mechanical analysis elastoplastic transition energy dissipation nanoparticle networks sintered silver

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Area of Science:

Materials Science
Nanotechnology
Mechanical Engineering

Background:

Nanoparticle networks are typically rigid and resistant to mechanical reorganization.
Unlike thixotropic gels, they don't easily fluidize under stress.

Purpose of the Study:

To investigate a nanoscale frictional unlocking mechanism in sintered silver nanoparticle networks.
To understand the transition from elastic to elastoplastic response under mechanical perturbation.

Main Methods:

High-resolution atomic force microscopy (AFM).
Dynamic mechanical analysis.
Microstructural analysis and energy dissipation measurements.

Main Results:

Identified a reversible transition from elastic to elastoplastic response triggered by small oscillatory strains.
Observed intermittent particle rearrangements enabling localized mobility while maintaining global integrity.
Quantified a stepwise densification pathway with distinct metastable configurations.

Conclusions:

The frictional unlocking mechanism facilitates tunable stiffness and dynamic adaptability in nanoparticle networks.
This contrasts with classical unjamming by preserving structural continuity.
Provides a framework for designing advanced materials for electronics, additive manufacturing, and energy storage.