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

Fermi Level Dynamics01:12

Fermi Level Dynamics

343
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
343
Phase Transitions: Sublimation and Deposition02:33

Phase Transitions: Sublimation and Deposition

18.0K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
18.0K
Phase Transitions02:31

Phase Transitions

20.2K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
20.2K
Phase Transitions: Vaporization and Condensation02:39

Phase Transitions: Vaporization and Condensation

18.5K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase...
18.5K
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

1.4K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
1.4K
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

510
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
510

You might also read

Related Articles

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

Sort by
Same author

The SINTER study: a recall-by-genotype design with multidimensional musculoskeletal phenotyping across internal-medicine outpatient clinics.

European journal of epidemiology·2026
Same author

Association of the triglyceride-glucose index with the severity and short-term prognosis of Guillain-Barré syndrome.

Frontiers in immunology·2026
Same author

Reconsidering "photon-ineligible" status in concurrent chemo-proton therapy for stage III non-small cell lung cancer.

Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology·2026
Same author

Taming the Hydrogen-Mediated Kinetic Switch for Sulfur-Tolerant CO<sub>2</sub> Electroreduction.

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

Self-Coordinating Electronic Metal-Support Interaction Stabilizes Ultralow-Loading Ir Single Atoms for Durable Acidic Oxygen Evolution.

Journal of the American Chemical Society·2026
Same author

Biaxial Strain-Engineered Pt-Sulfur Vacancy Dual Active Sites in Pt/MoO<sub>2</sub>@MoS<sub>2</sub> Architectures for pH-Universal Hydrogen Evolution.

ACS nano·2026
Same journal

Polarization-State-Dependent Charge Screening in Metal-Ferroelectric-Metal Memcapacitors Enabled by an IGZO Oxygen Reservoir Layer.

ACS applied materials & interfaces·2026
Same journal

Enabling Closed-Loop Recycling of Carbon Fiber-Reinforced Composites: A Dynamic Network Strategy Based on Cardanol-Derived Amines and Lignin-Derived Carbonates.

ACS applied materials & interfaces·2026
Same journal

Unconventional Phase Shift in Spin Hall Magnetoresistance of Antiferromagnetic Insulators.

ACS applied materials & interfaces·2026
Same journal

The Evolving Landscape of Terahertz Biosensing: From Sensitivity to Precision.

ACS applied materials & interfaces·2026
Same journal

π-π Stacking Enhanced Generation of Reactive Species in Donor-Acceptor Heterojunctions for High-Efficiency Photocatalytic Degradation of Endocrine-Disrupting Compounds under Solar Light.

ACS applied materials & interfaces·2026
Same journal

Interfacial Engineering of Frustrated Lewis Pairs for Promoting Cellulose-to-Sorbitol Cascade Conversion.

ACS applied materials & interfaces·2026
See all related articles

Related Experiment Video

Updated: Sep 12, 2025

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
06:57

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Published on: July 17, 2020

2.3K

Defect-Mediated Phase Transitions and Structural Dynamics in Single-Layer VSe2.

Jinbang Hu1,2, Chaoqin Huang3, Lina Liu4

  • 1School of Physics and Electronics, Hunan University, Changsha 410082, China.

ACS Applied Materials & Interfaces
|August 6, 2025
PubMed
Summary
This summary is machine-generated.

Selenium defects in single-layer Vanadium Diselenide (SL VSe2) control phase transitions. Controlling these defects allows tuning of phase ratios for advanced 2D van der Waals materials.

Keywords:
ARPESSTMSe defect-mediated kineticsphase transitionvanadium diselenide

More Related Videos

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

12.4K
Fabricating van der Waals Heterostructures with Precise Rotational Alignment
09:25

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

9.6K

Related Experiment Videos

Last Updated: Sep 12, 2025

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
06:57

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Published on: July 17, 2020

2.3K
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

12.4K
Fabricating van der Waals Heterostructures with Precise Rotational Alignment
09:25

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

9.6K

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Surface Science

Background:

  • Understanding phase transition pathways in two-dimensional (2D) materials is crucial for next-generation devices.
  • Defect-mediated kinetics are a key, yet underexplored, factor in controlling these transitions.
  • Single-layer Vanadium Diselenide (SL VSe2) is a promising 2D material with tunable electronic properties.

Purpose of the Study:

  • To investigate the role of Selenium (Se) defects in mediating phase transitions in SL VSe2.
  • To elucidate the atomic-scale mechanisms governing these defect-induced phase changes.
  • To explore the potential for defect engineering to control phase ratios in VSe2.

Main Methods:

  • Growth of SL VSe2 on Au(111) substrate.
  • Controlled thermal annealing and Se replenishment.
  • Characterization using scanning tunneling microscopy (STM) and angle-resolved photoemission spectroscopy (ARPES).
  • Theoretical validation using density functional theory (DFT) calculations.

Main Results:

  • Initial 1T phase SL VSe2 transforms into Se-poor phases with altered lattice constants upon annealing.
  • DFT calculations confirm atomic structures of defective V selenide phases and transition pathways.
  • Se defect formation correlates with annealing temperature, influencing phase stability and transition modulation.
  • The density of Se defects is identified as a critical factor in stabilizing the 2H phase.

Conclusions:

  • Se defects play a pivotal role in mediating phase transitions in SL VSe2.
  • Controlling Se defect density offers a pathway to tune phase ratios within VSe2 films.
  • This enables the engineering of 2D van der Waals heterostructures with tailored properties for advanced applications.