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Related Concept Videos

Quantum Numbers02:43

Quantum Numbers

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It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
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The Quantum-Mechanical Model of an Atom02:45

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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
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At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
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San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
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Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
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A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Microscale-Resolution Thermal Mapping Using a Flexible Platform of Patterned Quantum Sensors.

Paolo Andrich1, Jiajing Li1, Xiaoying Liu1

  • 1Institute for Molecular Engineering , University of Chicago , Chicago , Illinois 60637 , United States.

Nano Letters
|July 14, 2018
PubMed
Summary

We developed a scalable method using nanodiamonds to create temperature sensors. These sensors accurately map temperature distributions in microelectronic devices, enabling better thermal management.

Keywords:
Diamond nanoparticlesNVdirected self-assemblynitrogen vacancyquantum sensing

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Quantum Sensing

Background:

  • Micro- and nanoscale temperature sensing is crucial for understanding physical systems and managing heat in miniaturized electronics.
  • Existing methods face challenges in achieving high spatial resolution and accurate temperature monitoring.

Purpose of the Study:

  • To develop a scalable fabrication method for nanodiamond-based temperature sensors.
  • To demonstrate the application of these sensors in mapping temperature distributions in operating electronic devices.

Main Methods:

  • Utilized directed self-assembly and transfer-printing techniques for fabricating nanodiamond arrays.
  • Embedded temperature-sensitive fluorescent spin defects within nanodiamonds.
  • Integrated nanoparticles into a low-thermal-conductivity matrix for enhanced performance and reusability.

Main Results:

  • Achieved high-yield (98 ± 0.8%) dense nanodiamond arrays with strong photoluminescence.
  • Demonstrated tunable array parameters from sparse single-particle to dense configurations.
  • Successfully reconstructed the temperature map of an operating coplanar waveguide, confirming sensor accuracy.

Conclusions:

  • The developed nanodiamond sensor arrays offer a promising platform for high-resolution temperature mapping.
  • This technology has potential applications in microelectronics thermal management and quantum computing.