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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

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A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
3.0K

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Nitrogen-vacancy nanodiamond based local thermometry using frequency-jump modulation.

Shashi K R Singam1, Milos Nesladek2, Etienne Goovaerts1

  • 1Physics Department, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium.

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This study introduces a sensitive, contact-free thermal sensing method using nitrogen-vacancy (NV) centers in nanodiamonds. The technique achieves high spatial resolution for precise temperature mapping, demonstrated on microelectronic devices.

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Area of Science:

  • Quantum sensing
  • Materials science
  • Nanotechnology

Background:

  • Accurate temperature monitoring is crucial for microelectronic device performance and reliability.
  • Existing thermal sensing methods often lack the required spatial resolution or are contact-based.
  • Nitrogen-vacancy (NV) centers in nanodiamonds offer unique quantum properties for sensing applications.

Purpose of the Study:

  • To develop a straightforward and sensitive contact-free thermal sensing approach with high spatial resolution.
  • To utilize optically detected magnetic resonance (ODMR) of NV centers for temperature measurements.
  • To demonstrate the applicability of this method for real-time thermal mapping of microelectronic circuits.

Main Methods:

  • Employing negatively charged nitrogen-vacancy (NV) centers within fluorescent nanodiamonds.
  • Utilizing a frequency-jump procedure, a frequency modulation technique, to detect temperature shifts.
  • Performing time-dependent local temperature measurements on a microelectronics circuit during electrical switching.

Main Results:

  • Achieved sensitive, contact-free thermal sensing with high spatial resolution.
  • Demonstrated a signal directly proportional to temperature shifts across a wide range.
  • Successfully mapped local temperature variations on a microelectronic device under operation.

Conclusions:

  • The presented ODMR-based approach provides a versatile and effective tool for non-invasive thermal sensing.
  • This method holds significant potential for thermal characterization and diagnostics in microelectronics and other fields.
  • The frequency-jump technique enhances sensitivity and accuracy in NV center-based thermometry.