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Related Experiment Video

Updated: Dec 2, 2025

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
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Mobile nanotweezers for active colloidal manipulation.

Souvik Ghosh1, Ambarish Ghosh2,3,4

  • 1Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 560012, India.

Science Robotics
|November 3, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed mobile nanotweezers (MNTs) by combining plasmonic nanostructures with magnetic microrobots. These MNTs offer fast, accurate manipulation of nanoscale objects in fluids, overcoming limitations of conventional optical traps.

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Area of Science:

  • Nanotechnology
  • Optics
  • Robotics

Background:

  • Controlling submicrometer objects in fluids is crucial for nanotechnology.
  • Conventional plasmonic trapping is limited by speed and requires objects to diffuse to predefined spots.

Purpose of the Study:

  • To overcome limitations of conventional plasmonic trapping.
  • To develop a method for fast and accurate manipulation of nanoscale objects in fluidic environments.

Main Methods:

  • Integration of plasmonic nanostructures with magnetically driven helical microrobots.
  • Remote maneuvering of resultant mobile nanotweezers (MNTs) under optical illumination.
  • Temporary stamping of MNTs onto microfluidic chamber surfaces.

Main Results:

  • MNTs can be maneuvered within bulk fluid and stamped onto surfaces.
  • Achieved selective pickup, transport, release, and 3D positioning of submicrometer objects with high speed and accuracy.
  • Demonstrated manipulation of various materials, including bacteria and fluorescent nanodiamonds.

Conclusions:

  • Mobile nanotweezers combine strengths of plasmonics and microrobotics for advanced optical nanomanipulation.
  • MNTs offer enhanced capabilities for manipulating nano-objects in standard microfluidic chambers.
  • This technology enables new possibilities in controlling nanoscale entities in liquid environments.