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

Emission Spectra02:39

Emission Spectra

52.0K
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
52.0K
Photoelectric Effect02:26

Photoelectric Effect

29.6K
When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
29.6K
The de Broglie Wavelength02:32

The de Broglie Wavelength

25.8K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
25.8K
Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

2.0K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
2.0K
Deactivation Processes: Jablonski Diagram01:25

Deactivation Processes: Jablonski Diagram

638
Luminescence, the emission of light by a substance that has absorbed energy, is a process that involves the interaction of molecules with light. The energy-level diagram, or Jablonski diagram, is a graphical representation of these interactions, illustrating the various states and transitions a molecule can undergo. In a typical Jablonski diagram, the lowest horizontal line represents the ground-state energy of the molecule, which is usually a singlet state. This state represents the energies...
638
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

647
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
647

You might also read

Related Articles

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

Sort by
Same author

Colored Daytime Radiative Cooling Textiles Supported by Semiconductor Quantum Dots.

ACS applied materials & interfaces·2023
Same author

Regulation of gut microbiota-bile acids axis by probiotics in inflammatory bowel disease.

Frontiers in immunology·2022
Same author

Activation of β2-adrenergic Receptor Ameliorates Amyloid-β-induced Mitophagy Defects and Tau Pathology in Mice.

Neuroscience·2022
Same author

Physical Activity Coaching via Telehealth for People With Parkinson Disease: A Cohort Study.

Journal of neurologic physical therapy : JNPT·2022
Same author

Association of Primary and Booster Vaccination and Prior Infection With SARS-CoV-2 Infection and Severe COVID-19 Outcomes.

JAMA·2022
Same author

A commentary on "Personalized pre-habilitation reduces anastomotic complications compared to up front surgery before ileocolic resection in high-risk patients with Crohn's disease: A single center retrospective study" [Int. J. Surg. 105 (2022) 106815].

International journal of surgery (London, England)·2022

Related Experiment Video

Updated: Jun 24, 2025

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

9.2K

Thermal Emission Modulation by Electron Population in Quantum Dots.

Yu Gu1, Haixiao Xu1, Zhi Li1

  • 1Key Laboratory of Advanced Display Materials and Devices, Ministry of Industry and Information Technology, College of Material Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094 China.

Physical Review Letters
|June 10, 2024
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate temperature modulation of thermal emissivity using quantum dots. This quantum confinement effect enables tunable thermal emission for advanced engineering applications.

More Related Videos

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode
10:41

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Published on: May 31, 2018

8.8K
Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

12.8K

Related Experiment Videos

Last Updated: Jun 24, 2025

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

9.2K
Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode
10:41

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Published on: May 31, 2018

8.8K
Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

12.8K

Area of Science:

  • Materials Science
  • Quantum Physics
  • Nanotechnology

Background:

  • Quantum dots exhibit unique quantum confinement effects.
  • Temperature modulation of thermal emissivity is crucial for advanced applications.
  • Existing methods for thermal emission control have limitations.

Purpose of the Study:

  • To investigate the temperature modulation of thermal emissivity using quantum dots.
  • To explore the role of quantum confinement effects in thermal emission.
  • To demonstrate the potential of quantum dots for engineering applications.

Main Methods:

  • Theoretical modeling of quantum dot dielectric function based on electron population difference.
  • Experimental validation using Silver Selenide (Ag2Se) quantum dots.
  • Measurement of temperature modulation rate of dielectric function.

Main Results:

  • Quantum confinement in quantum dots creates a quasi-two-level electronic system (QTLES).
  • The dielectric function of QTLES shows strong temperature dependence, tunable via Fermi-level.
  • A significant modulation rate (dε/dT ≈ 1.5×10⁻³ K⁻¹) was achieved with Ag2Se quantum dots.

Conclusions:

  • Quantum dots offer an efficient pathway for temperature modulation of thermal emission near room temperature.
  • The demonstrated tunable thermal emission properties open possibilities for energy harvesting, thermal camouflage, and thermal rectifications.
  • This work provides a new avenue for designing advanced optical and thermal management devices.