Related Experiment Video
Updated: Sep 21, 2025
09:13
Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment
Published on: April 4, 2017
7.7K
Integrated Multifunctional Graphene Discs 2D Plasmonic Optical Tweezers for Manipulating Nanoparticles
Hongyan Yang1,2, Ziyang Mei1, Zhenkai Li1
1College of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
Nanomaterials (Basel, Switzerland)
|May 28, 2022
Summary
We developed a novel 2D plasmonic optical tweezer using graphene discs. This system enables precise manipulation of nanoparticles with low laser power, offering versatile applications in nanotechnology.
Area of Science:
- Nanotechnology
- Optics
- Materials Science
Background:
- Optical tweezers are essential for non-invasive manipulation of nanoparticles in biological and medical fields.
- Existing plasmonic tweezers often require high incident light intensity.
Purpose of the Study:
- To present an integrated, multifunctional 2D plasmonic optical tweezer based on graphene discs.
- To demonstrate precise control over nanoparticle manipulation using tunable optical forces.
Main Methods:
- Numerical simulation using the finite element method.
- Utilizing an array of graphene discs integrated with a substrate circuit for bias voltage application.
- Configuring graphene Fermi energy to control localized surface plasmonic resonance (LSPR).
Main Results:
- Optical forces generated via LSPR on graphene discs at low incident intensity (1 mW/μm²).
- Demonstrated control of LSPR excitation position by modulating Fermi energy with bias voltage.
- Achieved dynamic, arbitrary 2D transportation of nanoparticles.
Conclusions:
- The developed 2D plasmonic optical tweezer is multifunctional, enabling trapping, transport, sorting, and fusion of nanoparticles.
- This technology offers potential applications in lab-on-a-chip devices, nano-assembly, and enhanced Raman sensing.
