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

Quantum Numbers02:43

Quantum Numbers

51.7K
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.
51.7K
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)01:19

2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)

1.5K
Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...
1.5K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

59.0K
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.
59.0K
Harmonic Mean01:09

Harmonic Mean

3.8K
The arithmetic mean is usually skewed towards the larger values in the data set. Therefore, to avoid this inherent bias towards smaller values, the harmonic mean is used.
Take the example of the speed of a car, which is the measure of the rate of distance traveled. If the vehicle traverses the same distance back-and-forth, its average speed equals the total distance traveled divided by the total time taken. However, if the car moves with varying speeds, then the arithmetic mean is more skewed...
3.8K
Atomic Radii and Effective Nuclear Charge03:08

Atomic Radii and Effective Nuclear Charge

62.2K
The elements in groups of the periodic table exhibit similar chemical behavior. This similarity occurs because the members of a group have the same number and distribution of electrons in their valence shells.
62.2K
Formal Charges02:42

Formal Charges

40.6K
In some cases, there are seemingly more than one valid Lewis structures for molecules and polyatomic ions. The concept of formal charges can be used to help predict the most appropriate Lewis structure when more than one reasonable structure exists.
40.6K

You might also read

Related Articles

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

Sort by
Same author

Lead Isotope Fingerprinting of Nanoscale Mineral Particles via Single Particle Inductively Coupled Plasma Mass Spectrometry.

Analytical chemistry·2026
Same author

Anisotropic Exciton Transport in a Lamellar CsPbBr<sub>3</sub> Nanocrystal Superlattice.

Nano letters·2026
Same author

1D Silver Organochalcogenide Semiconductors: Color Tunable Luminescence, Polarized Emission, and Long-Range Exciton Diffusion.

Journal of the American Chemical Society·2025
Same author

Systematic Bandgap Engineering of a 2D Organic-Inorganic Chalcogenide Semiconductor via Ligand Modification.

Journal of the American Chemical Society·2025
Same author

Ligand Shell Thickness of Colloidal Nanocrystals: A Comparison of Small-Angle Neutron and X-ray Scattering.

Journal of the American Chemical Society·2025
Same author

Layered Metal-Organic Chalcogenides: 2D Optoelectronics in 3D Self-Assembled Semiconductors.

ACS nano·2025

Related Experiment Video

Updated: Feb 7, 2026

Production and Targeting of Monovalent Quantum Dots
10:16

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

26.1K

Ultrafast Charge Transfer at a Quantum Dot/2D Materials Interface Probed by Second Harmonic Generation.

Aaron J Goodman1, Nabeel S Dahod2, William A Tisdale2

  • 1Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States.

The Journal of Physical Chemistry Letters
|July 12, 2018
PubMed
Summary

We show tunable electronic coupling between quantum dots (QDs) and transition metal dichalcogenides (TMDs). Ultrafast electron transfer and coherent vibrational dynamics were observed at the QD/TMD interface.

More Related Videos

Compact Quantum Dots for Single-molecule Imaging
17:14

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

18.7K
Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

15.5K

Related Experiment Videos

Last Updated: Feb 7, 2026

Production and Targeting of Monovalent Quantum Dots
10:16

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

26.1K
Compact Quantum Dots for Single-molecule Imaging
17:14

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

18.7K
Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

15.5K

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Hybrid quantum dot (QD)/transition metal dichalcogenide (TMD) heterostructures offer tunable optoelectronic properties.
  • Understanding interfacial charge and energy transfer is crucial for next-generation devices.

Purpose of the Study:

  • To demonstrate tunable electronic coupling between CdSe QDs and monolayer WS2.
  • To investigate the dynamics of charge transfer at the QD/TMD interface.
  • To explore ultrafast electronic-vibrational coupling.

Main Methods:

  • Fabrication of hybrid heterostructures using CdSe QDs with variable length alkanethiol ligands and monolayer WS2.
  • Femtosecond time-resolved second harmonic generation (SHG) microscopy.

Main Results:

  • Tunable electronic coupling achieved by varying ligand length on CdSe QDs.
  • Ultrafast electron transfer (50 fs to 1 ps) from photoexcited CdSe QDs to WS2 observed.
  • Coherent acoustic phonon oscillations in QDs modulating WS2 SHG response at fastest transfer rates (≤50 fs).

Conclusions:

  • Strong electronic coupling at the QD/TMD interface.
  • Time-resolved SHG is a powerful tool for studying ultrafast dynamics in TMD heterostructures.
  • Potential for advanced optoelectronic device applications.