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Updated: Jun 11, 2026

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

Holographically defined nanoparticle placement in 3D colloidal crystals.

Yoonho Jun¹, Dongguk Yu, Matthew C George

¹Department of Materials Science and Engineering, Beckman Institute, and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.

Journal of the American Chemical Society

|July 2, 2010

Summary

This summary is machine-generated.

We developed a photochemical method using optical interference to precisely position nanoparticles within colloidal crystals. This technique utilizes light-induced surface charge changes to guide gold nanoparticle deposition with nanoscale accuracy.

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Last Updated: Jun 11, 2026

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Published on: September 27, 2011

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Area of Science:

Materials Science
Nanotechnology
Photochemistry

Background:

Precisely localizing nanoparticles within porous structures is crucial for advanced materials.
Existing methods often lack the resolution or versatility required for complex architectures.

Purpose of the Study:

To demonstrate a novel optical interference-based photochemical method for high-resolution nanoparticle localization.
To enable controlled deposition of charged nanoparticles within colloidal crystals and similar porous media.

Main Methods:

Utilized two-beam interference lithography for high-resolution optical patterning of colloidal crystals.
Employed a photocleavable linker (4-Bromomethyl-3-nitrobenzoic acid, BNBA) with a dansylamide moiety for enhanced absorption at 351 nm.
Leveraged photoinduced inversion of surface charge to drive localized deposition of charged gold nanoparticles.

Main Results:

Achieved precise patterning of colloidal crystals with a periodicity of 400 nm.
Successfully localized gold nanoparticles within a defined region of approximately 200 nm width.
Demonstrated the effectiveness of photoswitching in a refractive-index-matched porous medium.

Conclusions:

The developed photochemical method offers high-resolution control over nanoparticle placement within porous materials.
This approach is adaptable for various charged nanoparticles and porous structures.
The strategy combines photoswitching with targeted nanoparticle attachment for versatile material fabrication.