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Updated: Jun 7, 2025

Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles

Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles

Published on: October 16, 2017

Liquid-Crystallization-Driven Self-Assembly toward Uniform Multi-Morphology Fried-Egg-Like Nanostructures.

Longgang Xia¹, Hao Zhu¹, Binbin Xu¹

¹Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China.

Chemistry (Weinheim an Der Bergstrasse, Germany)

|November 14, 2024

Summary

Researchers created unique fried-egg-shaped nanostructures using liquid-crystallization-driven self-assembly (LCDSA) of a single polymer. This method controls the formation of multi-morphology structures, offering new possibilities for nanomaterial design.

Keywords:

Azobenzene Copolymer Liquid-crystallization-driven self-assembly Micelle

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Published on: June 20, 2019

Area of Science:

Polymer Chemistry
Materials Science
Nanotechnology

Background:

Liquid-crystallization-driven self-assembly (LCDSA) is effective for creating uniform nanostructures.
Generating diverse nanostructures from a single polymer source via self-assembly is challenging.

Purpose of the Study:

To report the first successful preparation of multi-morphology fried-egg-like nanostructures from a single polymer sample.
To investigate the role of aggregation kinetics in forming complex nanostructures.

Main Methods:

Utilized LCDSA of polyamidoamine-azobenzene (PAMAM-Azo6) in methanol.
Controlled self-assembly by varying azobenzene content and employing annealing processes.

Main Results:

Achieved uniform, fried-egg-like nanostructures with distinct core and protruding platelet morphologies.
Demonstrated that differing aggregation rates lead to sequential nucleation and growth stages.
Showed that annealing refines imperfect structures into thermodynamically stable, perfect fried-egg shapes.

Conclusions:

Established an efficient LCDSA strategy for producing uniform, multi-morphology nanostructures.
Highlighted the critical influence of aggregation kinetics in liquid-crystalline-coil block copolymers for nanostructure formation.