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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

2.3K
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...
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Thermal Energy Microscopically, thermal energy is the kinetic energy associated with the random motion of atoms and molecules. Temperature is a quantitative measure of “hot” or “cold”, which depends on the amount of thermal energy. When the atoms and molecules in an object are moving or vibrating quickly, they have a higher average kinetic energy (KE) (or higher thermal energy), and the object is perceived as “hot”, or it is described as being at a...
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Related Experiment Video

Updated: Oct 8, 2025

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Quantitative Mapping of Unmodulated Temperature Fields with Nanometer Resolution.

Amin Reihani1, Yuxuan Luan1, Shen Yan1

  • 1Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States.

ACS Nano
|December 27, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces contact resistance resolved scanning thermal microscopy (CR-SThM) for precise temperature mapping. CR-SThM achieves nanometric resolution for quantitative thermal imaging without device temperature modulation.

Keywords:
nanoscale quantitative temperature mappingplatinum resistance thermometer probesquantifying contact resistancescanning thermal microscopyunmodulated temperature fields

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Area of Science:

  • Nanoscale science and technology
  • Materials science
  • Surface science

Background:

  • Quantitative temperature mapping at the nanoscale is crucial for nanoelectronics, plasmonics, and quantum systems.
  • Scanning thermal microscopy (SThM) faces challenges due to unknown tip-sample thermal resistance (R_TS).
  • Existing methods struggle with unmodulated temperature fields and topographical variations in R_TS.

Purpose of the Study:

  • To develop a method for quantitative temperature mapping of unmodulated fields with high spatial and thermal resolution.
  • To overcome limitations of current SThM techniques that require temperature modulation.
  • To enable accurate thermal imaging even when tip-sample thermal resistance varies significantly.

Main Methods:

  • Utilized custom-fabricated scanning thermal probes (STPs) with integrated heaters/thermometers and sharp tips (∼25 nm radius).
  • Introduced modulated heat input to the STP and measured its AC and DC temperature responses.
  • Developed contact resistance resolved scanning thermal microscopy (CR-SThM) for simultaneous R_TS and temperature mapping.

Main Results:

  • Achieved ∼7 nm spatial resolution and ∼50 mK temperature resolution in a 1 Hz bandwidth.
  • Successfully mapped unmodulated temperature fields in a single scan.
  • Enabled simultaneous quantification of tip-sample thermal resistance and sample surface temperature.

Conclusions:

  • CR-SThM provides a novel approach for quantitative thermal imaging of microdevices under practical operating conditions.
  • This technique overcomes the need for temperature modulation, expanding SThM applications.
  • Facilitates precise temperature mapping in fields like nanoelectronics and surface chemistry.