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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

1.7K
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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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Shell thickness-induced thermal dependence: highly sensitive core-shell CdSe/ZnS/POSS-based temperature probes.

Jiannan Sun1, Ke Yan1, Aizhao Pan2

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Quantum dots (QDs) offer advanced non-contact temperature monitoring. Modulating the shell thickness of Cadmium Selenide/Zinc Sulfide (CdSe/ZnS) quantum dots significantly enhances their temperature-sensing capabilities and stability.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Quantum dots (QDs) are crucial for non-contact temperature monitoring.
  • Tuning QD properties is vital for developing advanced sensors.
  • Shell thickness influences QD fluorescence and sensing characteristics.

Purpose of the Study:

  • To investigate the effect of shell thickness on the temperature-sensing properties of CdSe/ZnS QDs.
  • To develop QD-based temperature probe films with modulated sensing characteristics.
  • To optimize QD temperature probes for enhanced performance.

Main Methods:

  • Fabrication of CdSe/ZnS QD/POSS films with varying ZnS shell thicknesses.
  • Characterization of fluorescence properties and temperature dependency.
  • Evaluation of temperature sensitivity, linearity, range, and reversibility.

Main Results:

  • ZnS shell thickness significantly regulated temperature dependency, linearity, application range, and reversibility.
  • CdSe/ZnS QDs with a 4-monolayer shell exhibited superior thermal stability and a wide usable temperature range (20-80 °C).
  • The optimized QD probe achieved excellent temperature sensitivity (R² > 0.994).

Conclusions:

  • Shell thickness is a critical factor in optimizing QD temperature sensing performance.
  • Controlling QD shell thickness offers a viable strategy for designing high-performance temperature probes.
  • This work highlights the potential of shell engineering for advanced QD-based sensing applications.