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Nanothermometry with Enhanced Sensitivity and Enlarged Working Range Using Diamond Sensors.

Gang-Qin Liu1,2, Ren-Bao Liu, Quan Li

  • 1Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

Accounts of Chemical Research
|January 3, 2023
PubMed
Summary
This summary is machine-generated.

Researchers enhanced diamond nanothermometry for improved temperature sensing. They achieved record sensitivity using hybrid nanodiamond-magnetic nanoparticle structures and extended the working range to 1000 K.

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Area of Science:

  • Physics
  • Materials Science
  • Quantum Sensing

Background:

  • Nanothermometry is crucial for advanced research but faces challenges in sensitivity and temperature range.
  • Diamond with nitrogen-vacancy (NV) centers offers unique properties for nanoscale sensing.
  • Current NV-based nanothermometry has limitations in sensitivity and high-temperature applications.

Purpose of the Study:

  • To enhance the temperature sensitivity of diamond-based nanothermometry.
  • To extend the working temperature range of NV-based sensors.
  • To develop practical schemes for site-specific temperature sensing at the nanoscale.

Main Methods:

  • Utilizing hybrid structures of nanodiamond and magnetic nanoparticles to transduce and amplify temperature signals.
  • Implementing a pulsed heating-cooling scheme for high-temperature quantum sensing (up to 1000 K).
  • Leveraging the spin resonance frequency shift with temperature in NV centers.

Main Results:

  • Achieved a record temperature sensitivity of 76 μK/√Hz using hybrid nanodiamond-magnetic nanoparticle structures.
  • Demonstrated reliable quantum sensing with NV centers at temperatures up to 1000 K.
  • Showcased the potential for site-specific temperature sensing with nanoscale spatial resolution.

Conclusions:

  • Diamond nanothermometry can be significantly enhanced in sensitivity and working temperature range.
  • Hybrid nanostructure designs and advanced pulsing techniques are key to overcoming current limitations.
  • Further research is needed to address unsolved problems and expand future applications.