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

UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

1.3K
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
1.3K
IR Absorption Frequency: Hybridization01:21

IR Absorption Frequency: Hybridization

624
Hydrocarbons such as alkanes, alkenes, and alkynes show characteristic C–H stretching absorption bands. These IR stretching frequencies depend on the hybridization of the involved carbon atom and can be explained in terms of the s character of each hybridized atomic orbital.
Among the sp, sp2, and sp3 hybridized orbitals, sp orbitals have the maximum s character (50%). Consequently, the electrons are held more closely to the nucleus, resulting in stronger and shorter C–H bonds that...
624
IR Absorption Frequency: Delocalization01:04

IR Absorption Frequency: Delocalization

714
Electron delocalization refers to the distribution of electrons across multiple atoms within a molecule rather than being confined to a single atom or bond. This phenomenon is common in systems with conjugated bonds—structures where alternating single and double bonds allow π-electrons to move freely across the network. The movement of electrons stabilizes the molecule and can affect various chemical properties, including vibrational frequencies observed in IR spectroscopy.
In IR...
714
Energy Bands in Solids01:01

Energy Bands in Solids

679
Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
 Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
679
The de Broglie Wavelength02:32

The de Broglie Wavelength

25.3K
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...
25.3K
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

998
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
998

You might also read

Related Articles

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

Sort by
Same author

Self-Organized Nanoplasmonic Artificial Leaf for Hot-Carrier Bioelectronic Interfaces.

Nature photonics·2026
Same author

2D Semiconductor Nanosheets Supported on Colloidal Quantum Cubes.

ACS nano·2026
Same author

Strong effect of the nonpolar solvent molecular structure on CdSe nanoplatelet stacking.

Nanoscale·2026
Same author

Atomic Alignment in PbS Nanocrystal Superlattices with Compact Inorganic Ligands via Reversible Oriented Attachment of Nanocrystals.

Journal of the American Chemical Society·2026
Same author

Tracking Optical Phonon Dynamics in InP Nanocrystals via Transient Absorption and Femtosecond Stimulated Raman Spectroscopy.

ACS nano·2026
Same author

Tetrel Bond-Mediated Photophysical Modulation and Fluoride Recognition in Carbazole-Organosilanes.

Inorganic chemistry·2026
Same journal

Higher-Order Clustering of Receptors Real-Time Projected by Plasmon-ruler on the Single Live Cell.

Nano letters·2026
Same journal

Achieving Fermi-Level Depinning and Ideal Metal Contact in <i>β</i>-Ga<sub>2</sub>O<sub>3</sub> Devices via MXene Integration.

Nano letters·2026
Same journal

AI-Assisted Electron Microscopy in Structure-Performance Analysis of Advanced Catalysts: From Atomic Resolution to Statistical Significance.

Nano letters·2026
Same journal

Electrically Switchable Ultraslow Dispersionless Polaritons via Twist Engineering in van der Waals Heterostructures.

Nano letters·2026
Same journal

Correction to "Ultrasonication-Triggered Ubiquitous Assembly of Magnetic Janus Amphiphilic Nanoparticles in Cancer Theranostic Applications".

Nano letters·2026
Same journal

Tunable Proximity Valley Splitting Via Interfacial Exchange Pinning in WSe<sub>2</sub>-CrBr<sub>3</sub>-CrPS<sub>4</sub> Heterostructures.

Nano letters·2026
See all related articles

Related Experiment Video

Updated: May 29, 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

9.1K

Bound and Continuum Intersubband Transitions in Colloidal Quantum Wells.

Benjamin T Diroll1, Igor Coropceanu2, Joshua Portner2

  • 1Center for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, Illinois 60439, United States.

Nano Letters
|February 2, 2025
PubMed
Summary
This summary is machine-generated.

Atomically precise colloidal quantum wells offer tunable electronic properties for optoelectronics. Researchers demonstrated control over intersubband transitions in CdSe/ZnS and CdSe/CdS core/shell structures.

Keywords:
colloidal atomic layer depositionintersubbandintrabandnanoplateletsquantum well

More Related Videos

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

9.5K
Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
15:58

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

5.7K

Related Experiment Videos

Last Updated: May 29, 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

9.1K
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

9.5K
Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
15:58

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

5.7K

Area of Science:

  • Materials Science
  • Quantum Electronics
  • Nanotechnology

Background:

  • Quantum well intersubband transitions are essential for advanced optoelectronic devices like quantum cascade lasers and infrared photodetectors.
  • Controlling band offsets in quantum wells enables distinct transition types: bound-to-bound and bound-to-continuum.

Purpose of the Study:

  • To investigate intersubband transitions in colloidal CdSe quantum wells by modifying heterostructure shells.
  • To demonstrate the tunability of electronic properties in atomically precise core/shell quantum wells.
  • To explore the potential of these materials for mid-infrared optoelectronics.

Main Methods:

  • Fabrication of colloidal CdSe quantum wells with different core/shell heterostructures (CdSe/ZnS and CdSe/CdS).
  • Spectroscopic analysis of intersubband transitions.
  • Correlation of transition properties with shell thickness and material composition.

Main Results:

  • Bare CdSe wells exhibited narrow, near-infrared intersubband transitions consistent with effective mass predictions.
  • CdSe/ZnS core/shell structures showed narrow, redshifted bound-to-bound transitions as shell thickness increased.
  • CdSe/CdS core/shell structures displayed broad bound-to-continuum absorptions due to delocalized electronic states.

Conclusions:

  • Atomically precise colloidal quantum wells provide a versatile platform for engineering intersubband transitions.
  • The choice of shell material (ZnS vs. CdS) dictates the type and characteristics of intersubband transitions.
  • These findings pave the way for developing novel mid-infrared optoelectronic materials.