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Fabricating van der Waals Heterostructures with Precise Rotational Alignment

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Published on: July 5, 2019

Multimodal Optothermal Manipulations along Various Surfaces.

Hongru Ding¹, Pavana Siddhartha Kollipara¹, Kan Yao^1,2

¹Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States.

|April 5, 2023

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This study introduces an optothermal platform for precise multimodal manipulation of micro/nanoparticles. It enables five distinct working modes for versatile applications in life sciences and nanotechnology.

Area of Science:

Physics
Nanotechnology
Biophysics

Background:

Conventional optical tweezers offer contact-free manipulation but require complex systems for textured surfaces and are limited to single modes.
Applications like cell membrane characterization need precise micro/nanoparticle control on diverse surfaces.

Purpose of the Study:

To develop an optothermal platform for multimodal manipulation of micro/nanoparticles along various surfaces.
To overcome the limitations of conventional optical tweezers in terms of manipulation modes and surface adaptability.

Main Methods:

Utilizing a synergy between optical and thermal forces generated by laser-induced temperature gradients.
Implementing a simple laser beam control to achieve five switchable working modes: tweezing, rotating, rolling (toward/away), and shooting.

Keywords:

micro/nanoparticles multimodal manipulation optical heating optical manipulation single-cell manipulation

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Demonstrating manipulation on synthesized particles, biological cells, and rough surfaces of live organisms.

Main Results:

Achieved multimodal manipulation of micro/nanoparticles with five distinct, switchable working modes.
Successfully manipulated both synthesized particles and biological cells on various substrates, including live worms and embryos.
Enabled three-dimensional control of micro/nano-objects on topologically uneven biological tissues.

Conclusions:

The developed optothermal platform provides versatile, multimodal manipulation capabilities for micro/nanoparticles.
This technology offers precise control on diverse surfaces, including biological tissues, with potential applications in life sciences, nanotechnology, and colloidal sciences.
The platform overcomes limitations of conventional optical tweezers, enabling advanced research and applications.