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Nanodiamonds That Swim.

Ji Tae Kim1,2, Udit Choudhury1,3, Hyeon-Ho Jeong1,4

  • 1Max Planck Institute for Intelligent Systems, Heisenbergstr. 3, 70569, Stuttgart, Germany.

Advanced Materials (Deerfield Beach, Fla.)
|June 13, 2017
PubMed
Summary
This summary is machine-generated.

Researchers created active nanodiamond swimmers propelled by light. These nanoscale devices offer controlled movement for bio-sensing and imaging applications in aqueous environments.

Keywords:
nanodiamondsnitrogen vacancy centerself-thermophoretic micromotorsvector magnetometry

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Area of Science:

  • Nanotechnology
  • Quantum Sensing
  • Biophysics

Background:

  • Nanodiamonds (NDs) with nitrogen vacancy (NV) centers are promising for bio-sensing and imaging.
  • Precise control of ND position and orientation in liquids is crucial for these applications.
  • Existing methods lack the necessary manipulation capabilities for nanoscale probes in aqueous solutions.

Purpose of the Study:

  • To develop an active nanodiamond swimmer capable of controlled locomotion in fluids.
  • To engineer ND swimmers with light-driven propulsion for nanoscale manipulation.
  • To demonstrate the optical addressability and controlled motion of these active nanodiamonds.

Main Methods:

  • Fabrication of nanodiamond swimmers using self-assembly and physical vapor shadow growth.
  • Integration of a light-driven self-thermophoretic micromotor with NDs containing NV centers.
  • Laser illumination to create local temperature gradients for propulsion.
  • Control of translational and rotational motion via shape-dependent hydrodynamic interactions.
  • Optical addressability demonstrated through electron spin resonance (ESR) measurements.

Main Results:

  • Successful realization of an active nanodiamond swimmer propelled by laser-induced thermophoresis.
  • Demonstrated control over both translational and rotational movement by tailoring swimmer geometry.
  • Confirmed optical addressability of the nanodiamond swimmers using ESR.
  • Achieved self-thermophoretic motion in aqueous solutions.

Conclusions:

  • Active nanodiamond swimmers represent a novel platform for nanoscale manipulation in liquids.
  • Controlled locomotion opens possibilities for advanced bio-sensing, imaging, and active transport in biological systems.
  • The engineered swimmers offer precise control and optical addressability for future applications.