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

π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

1.3K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.3K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

28.5K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
28.5K
Colors and Magnetism03:02

Colors and Magnetism

12.6K
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...
12.6K
Properties of Transition Metals02:58

Properties of Transition Metals

27.9K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
27.9K
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

380
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
380
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

45.4K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
45.4K

You might also read

Related Articles

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

Sort by
Same author

The 2026 guided acoustic waves roadmap.

Journal of physics D: Applied physics·2026
Same author

Ultrafast transition from coherent to incoherent polariton nonlinearities in a hybrid 1L-WS<sub>2</sub>/plasmon structure.

Nature nanotechnology·2026
Same author

Interplay of Energy and Charge Transfer in WSe<sub>2</sub>/CrSBr Heterostructures.

Nano letters·2025
Same author

Ultrafast Dynamics of Rydberg Excitons and Their Optically Induced Charged Complexes in Encapsulated WSe<sub>2</sub> Monolayers.

Nano letters·2025
Same author

Chiral Propagation of Plasmon Polaritons due to Competing Anisotropies in a Twisted Photonic Heterostructure.

Nano letters·2024
Same author

Acoustic Modulation of Excitonic Complexes in hBN/WSe<sub>2</sub>/hBN Heterostructures.

Nano letters·2024

Related Experiment Video

Updated: Oct 22, 2025

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
08:12

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

Published on: December 5, 2015

12.5K

Acoustically Driven Stark Effect in Transition Metal Dichalcogenide Monolayers.

Diego Scolfaro1, Matheus Finamor1, Luca O Trinchão1

  • 1Instituto de Física "Gleb Wataghin", Universidade Estadual de Campinas, 13083-859 Campinas, Brazil.

ACS Nano
|August 27, 2021
PubMed
Summary

Surface acoustic waves induce the Stark effect in MoSe2 monolayers, tuning optical emissions and dissociating excitonic states. This method offers efficient manipulation of two-dimensional nanostructures for optoelectronics.

Keywords:
Stark effectdielectric screeningexciton dissociationexciton polarizabilitysurface acoustic wavestransition metal dichalcogenidestrion polarizability

More Related Videos

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
08:50

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication

Published on: November 28, 2017

9.4K
Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol
10:41

Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol

Published on: December 20, 2016

14.2K

Related Experiment Videos

Last Updated: Oct 22, 2025

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
08:12

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

Published on: December 5, 2015

12.5K
Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
08:50

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication

Published on: November 28, 2017

9.4K
Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol
10:41

Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol

Published on: December 20, 2016

14.2K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • The Stark effect is crucial for manipulating quantum states in nanostructured systems.
  • Previous methods for inducing the Stark effect in transition metal dichalcogenides include optical and electric fields.
  • MoSe2 monolayers are promising materials for exploring excitonic properties.

Purpose of the Study:

  • To investigate the acoustically induced Stark effect in MoSe2 monolayers.
  • To tune optical emission energies and dissociate excitonic states using surface acoustic waves.
  • To determine the in-plane polarizabilities of excitons and trions in MoSe2.

Main Methods:

  • Transferring MoSe2 monolayers onto high dielectric constant piezoelectric substrates.
  • Applying a 220 MHz in-plane piezoelectric field generated by surface acoustic waves.
  • Analyzing changes in optical emission energies and exciton/trion states.

Main Results:

  • Achieved efficient quenching (above 90%) and red-shifting of excitonic optical emissions.
  • Determined large in-plane polarizabilities for neutral excitons (530 × 10⁻⁵ meV/(kV/cm)²) and trions (630 × 10⁻⁵ meV/(kV/cm)²).
  • Demonstrated that acoustically induced Stark effect is more efficient in MoSe2 monolayers on high dielectric substrates.

Conclusions:

  • Surface acoustic waves provide an effective means to induce the Stark effect in MoSe2 monolayers.
  • The large in-plane polarizabilities suggest potential for manipulating multiexciton interactions.
  • This technique opens avenues for advanced optoelectronic devices based on 2D semiconductors.