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Related Experiment Video

Updated: Mar 26, 2026

Fabrication of Large-area Free-standing Ultrathin Polymer Films

Fabrication of Large-area Free-standing Ultrathin Polymer Films

Published on: June 3, 2015

Soft-shear induced phase-separated nanoparticle string-structures in polymer thin films.

Ren Zhang¹, Bongjoon Lee², Michael R Bockstaller²

¹Department of Polymer Engineering, The University of Akron, 250 S Forge St, Akron, OH 44325, USA. alamgir@uakron.edu.

Faraday Discussions

|January 28, 2016

Summary

This summary is machine-generated.

This study demonstrates a new method for aligning nanoparticle domains in polymer blends using soft-shear dynamic zone annealing. This technique successfully creates unidirectionally aligned nanoparticle string-domains in thin films.

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Last Updated: Mar 26, 2026

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Area of Science:

Materials Science
Polymer Science
Nanotechnology

Background:

Shear stress is known to orient microstructures in block copolymers and polymer blends.
Nanoparticle (NP)-polymer blends offer unique properties but controlling their morphology is challenging.

Purpose of the Study:

To investigate the phase separation of a novel nanoparticle-polymer blend thin film system under shear.
To examine the influence of shear rate on nanoparticle domain elongation using a soft-shear dynamic zone annealing (DZA-SS) method.

Main Methods:

Utilized a soft-shear dynamic zone annealing (DZA-SS) method on a nanoparticle-polymer blend thin film.
Systematically varied DZA-SS translation speed to control effective shear rate.
Compared nanoparticle domain behavior with binary polymer blends.

Main Results:

Achieved unidirectional alignment of nanoparticle string-domains in thin films.
Demonstrated that shear rate significantly influences nanoparticle domain elongation.
Successfully fabricated aligned NP structures in a confined thin film geometry.

Conclusions:

The DZA-SS method is effective for creating unidirectionally aligned nanoparticle structures in NP-polymer blends.
This technique holds promise for fabricating functional nanoparticle structures.
The findings are applicable to various NP-polymer blend systems.