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Nanoparticle localization within chiral liquid crystal defect lines and nanoparticle interactions.

Mykola Tasinkevych^1,2,3, Sungoh Park⁴, Haridas Mundoor⁴

¹SOFT Group, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, United Kingdom.

Physical Review. E

|April 19, 2023

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Liquid crystals with topological defects can trap nanoparticles, enabling controlled assembly. Particle interactions depend on shape, anchoring, and temperature, paving the way for novel 1D nanomaterials.

Area of Science:

Soft matter physics
Materials science
Nanotechnology

Background:

Colloidal particle self-assembly is key for advanced materials.
Nematic liquid crystals (LCs) offer a rich platform for studying nanoparticle behavior.
LCs enable anisotropic interparticle interactions and particle alignment.

Purpose of the Study:

To investigate the use of LC topological defect lines for probing nanoparticle behavior and interactions.
To theoretically and experimentally demonstrate controlled nanoparticle manipulation using LC defects.
To explore the factors influencing nanoparticle interactions within LC media.

Main Methods:

Theoretical modeling using Landau-de Gennes free energy minimization.
Experimental observation of nanoparticle behavior in LC defect lines.

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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

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Published on: September 27, 2011

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Last Updated: Aug 2, 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

Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment

Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment

Published on: April 4, 2017

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

Published on: September 27, 2011

Laser tweezer manipulation of trapped nanoparticles.

Main Results:

LC defect lines effectively trap nanoparticles, allowing controlled movement.
Nanoparticle interactions are sensitive to particle shape, surface anchoring, and temperature.
Interaction character (repulsive/attractive) and strength are tunable.

Conclusions:

LC topological defects provide a versatile tool for nanoparticle manipulation and assembly.
Understanding nanoparticle-LC interactions is crucial for designing ordered nanostructures.
This approach facilitates the creation of 1D nanoparticle crystals with tunable spacing.