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Updated: Jan 4, 2026

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

Plasmonic optical trapping of nanoparticles with precise angular selectivity.

Ruo-Heng Chai, Wen-Jun Zou, Jun Qian

|November 6, 2019

Summary

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This study demonstrates a novel plasmonic trapping method using a gold-capped nanoparticle and metal tip tweezers. The gold cap enables precise optical trapping and adjustable angles, crucial for single molecule manipulation.

Area of Science:

Nanotechnology
Optics
Materials Science

Background:

Optical tweezers are vital for manipulating microscopic objects.
Asymmetric particles present challenges for precise optical trapping.
Plasmonic interactions offer enhanced control in optical trapping systems.

Purpose of the Study:

To propose and investigate a plasmonic trapping scheme for asymmetric nanoparticles.
To numerically analyze the optical trapping behavior of a gold-capped polystyrene nanoparticle using metal tip tweezers.
To explore the tunability of nanoparticle trapping angles via incident wavelength.

Main Methods:

Numerical investigation of optical trapping.
Utilizing a polystyrene nanoparticle with a gold cap.

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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

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Last Updated: Jan 4, 2026

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

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Published on: September 5, 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

Employing metal tip tweezers for particle manipulation.

Main Results:

The metal tip successfully captured the nanoparticle at the gold cap due to strong plasmonic interaction.
Trapping at other particle positions was not achieved.
The trapping angle was tunable by altering the incident wavelength.

Conclusions:

The proposed plasmonic trapping scheme allows for precise control over nanoparticle capture at the gold cap.
Tunable trapping angles have significant potential for advanced applications like single molecule manipulation.
This method offers a new approach for high-precision optical manipulation.