Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Imperfections in Crystal Structure: Non-Stoichiometric Defects01:29

Imperfections in Crystal Structure: Non-Stoichiometric Defects

73
Non-stoichiometric defects refer to a type of defect in the crystal structure of a compound where the ratio of its constituent elements deviates from the ideal stoichiometric ratio. There are two main types of non-stoichiometric defects: metal excess defects and metal deficiency defects.Metal excess defects occur when there is a slight surplus of metal ions than what is required by the stoichiometric ratio of the compound. For example, heating a sodium chloride crystal in sodium vapor results...
73
Colors and Magnetism03:02

Colors and Magnetism

14.6K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
14.6K
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

2.2K
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
2.2K
Valence Bond Theory02:42

Valence Bond Theory

11.6K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.6K
Imperfections in Crystal Structure: Stoichiometric Point Defects01:26

Imperfections in Crystal Structure: Stoichiometric Point Defects

85
Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
85
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

2.6K
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
2.6K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Tandem Photoelectrochemical Cells for Hydrogen Peroxide With Glyceric Acid Production.

Angewandte Chemie (International ed. in English)·2026
Same author

An inhibitory brainstem pathway reduces visual detection during background motion.

Nature communications·2026
Same author

Durable Zinc-Air Batteries on a NbN-Modified Fe-N-C Catalyst via a Radical-Scavenging Strategy.

Angewandte Chemie (International ed. in English)·2026
Same author

Ultralow-Potential Photoelectrochemical Synthesis of Hydroxylamine and Oximes.

Angewandte Chemie (International ed. in English)·2026
Same author

Dual-Sublattice Entropy via Cation-Anion Co-Doping Enables Broadband Solar Absorption and Efficient Photothermal Conversion.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

Dynamic Semiconductor Interface for Scalable Photoelectrochemical Synthesis of Chlorine Disinfectants from Natural Seawater.

Angewandte Chemie (International ed. in English)·2026

Related Experiment Video

Updated: Mar 27, 2026

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
11:14

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

Published on: May 28, 2016

14.6K

Entropy-Enabled Site Inversion and Defect Activation in Medium-Entropy Spinels for Near-Black Infrared Emission.

Ge-Ting Sun1,2, Cheng-Yu He1, Bao-Hua Liu1

  • 1Key Laboratory of Energy Conservation and Energy Storage Materials of Gansu Province, Research Center for Resource Chemistry and Energy Materials, State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|March 26, 2026
PubMed
Summary

This study introduces a novel medium-entropy inverse spinel coating for high-temperature thermal management. The new material achieves near-blackbody emissivity and exceptional durability, offering significant energy savings in extreme environments.

Keywords:
configurational entropyhigh‐temperature radiative coatingsinfrared emissivityinverse spinel oxidemedium‐entropy materials

More Related Videos

Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
07:24

Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis

Published on: May 10, 2021

6.9K
Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

2.8K

Related Experiment Videos

Last Updated: Mar 27, 2026

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
11:14

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

Published on: May 28, 2016

14.6K
Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
07:24

Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis

Published on: May 10, 2021

6.9K
Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

2.8K

Area of Science:

  • Materials Science
  • Nanotechnology
  • Thermodynamics

Background:

  • Spinel infrared (IR) coatings are crucial for high-temperature thermal management but often exhibit suboptimal emissivity and thermal drift.
  • Existing entropy-stabilized oxides lack a unifying principle for tailored infrared radiation.
  • Developing robust, high-emissivity materials is essential for efficient thermal management in extreme conditions.

Purpose of the Study:

  • To develop a generalizable strategy for creating near-black, durable IR radiators using spinels.
  • To investigate the role of configurational entropy in tuning band structure and lattice dynamics for enhanced radiative properties.
  • To create a scalable platform for energy-saving coatings in high-temperature applications.

Main Methods:

  • Synthesis of a medium-entropy inverse spinel oxide.
  • Characterization of emissivity, thermal stability, and thermal conductivity.
  • Spectroscopy and density functional theory (DFT) for mechanistic understanding.
  • Application as a sprayable coating on steel and refractories.

Main Results:

  • Achieved near-blackbody emissivity (∼0.90 across 0.78-16 µm) and doubled emissivity in the critical 2-8 µm band.
  • Demonstrated single-phase stability and enhanced emissivity after 200 hours at 1300°C.
  • Sprayable coatings reached ∼0.96 hemispherical emissivity, increasing furnace temperature by ∼44.3°C.
  • Identified entropy-driven mixed-valence states, oxygen vacancies, band gap narrowing, and activated IR phonons.

Conclusions:

  • Configurational entropy and site inversion provide a generalizable strategy to engineer robust spinel radiators.
  • The developed material offers a scalable solution for energy-saving coatings in extreme environments.
  • The findings pave the way for advanced thermal management solutions in industrial and energy sectors.