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Moving Meniscus-Assisted Template-Free Optothermofluidic Nanoparticle Patterning and Its Application in

Chetteente Meethal Ragisha¹, Nihal Muhammed Habeeb¹, Vijayan Lija Grace¹

¹Optofluidics and Interface Science Laboratory, Department of Physics, National Institute of Technology Calicut, Kozhikode, Kerala 673601, India.

Langmuir : the ACS Journal of Surfaces and Colloids

|June 3, 2024

Summary

This study introduces a novel method for precise gold nanoparticle patterning using light-induced Marangoni flow and vertical lifting. This technique enables large-area, template-free pattern creation for advanced applications.

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Area of Science:

Materials Science
Nanotechnology
Optics

Background:

Moving meniscus-assisted vertical lifting is common for large-area particle patterning.
Precise control over pattern morphology and substrate functionalization remain challenges.

Purpose of the Study:

To develop a new method for precise gold nanoparticle patterning without photomasks or templates.
To achieve dynamic control over the 3D morphology of inscribed patterns.

Main Methods:

Synergy of light-induced Marangoni flow and vertical lifting (moving meniscus).
Utilized plasmonic absorption of gold nanoparticles (Au NPs) for particle accumulation.
Controlled substrate lifting velocity, laser irradiation time, and lifting direction.

Main Results:

Demonstrated precise patterning of Au NPs (∼60 nm diameter) on solid substrates.
Successfully inscribed various patterns including lines, varying widths, and cross patterns.
Achieved dynamic control over 3D morphology and large-area patterning (up to centimeters).

Conclusions:

The developed method offers precise, template-free patterning of nanoparticles.
The plasmonically active surfaces enable large-area manipulation of microparticles.
This technique benefits applications in optical elements, sensors, and electronic circuits.