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

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

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

1.4K
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...
1.4K
pH Scale02:41

pH Scale

79.1K
Hydronium and hydroxide ions are present both in pure water and in all aqueous solutions, and their concentrations are inversely proportional as determined by the ion product of water (Kw). The concentrations of these ions in a solution are often critical determinants of the solution’s properties and the chemical behaviors of its other solutes. Two different solutions can differ in their hydronium or hydroxide ion concentrations by a million, billion, or even trillion times. A common means of...
79.1K
Scaling01:26

Scaling

582
In designing and analyzing filters, resonant circuits, or circuit analysis at large, working with standard element values like 1 ohm, 1 henry, or 1 farad can be convenient before scaling these values to more realistic figures. This approach is widely utilized by not employing realistic element values in numerous examples and problems; it simplifies mastering circuit analysis through convenient component values. The complexity of calculations is thereby reduced, with the understanding that...
582
Members Made of Elastoplastic Material01:19

Members Made of Elastoplastic Material

384
The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...
384
Genetic Material01:20

Genetic Material

3.3K
Within the human body, a complex and detailed system of trillions of cells works in unison to sustain life. Each cell houses a nucleus, which contains 46 chromosomes divided into 23 pairs. Chromosomes are highly coiled structures made of the genetic material DNA. These chromosomes are essential carriers of genetic information, with half inherited from the mother through her egg and the other half from the father's sperm, combining to create the unique genetic makeup of an individual.
3.3K
Two-Dimensional (2D) NMR: Overview01:12

Two-Dimensional (2D) NMR: Overview

1.5K
The 1D NMR spectrum of large and complex molecules like natural products has complicated splitting patterns and overlapping signals, which can be easily interpreted using 2-dimensional (2D) NMR. Unlike 1D NMR, 2D NMR has two frequency axes that provide the coupling information between the nucleus A and nucleus B in a molecule. The process from which 2D spectra are obtained has four steps.
The first step is the preparation period, during which nucleus A is excited with a radiofrequency pulse....
1.5K

You might also read

Related Articles

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

Sort by
Same author

Dual-Mode Nucleation and Dynamic Alloying of Silicon on Ag(111).

Nano letters·2026
Same author

Fermi-level depinning achieved by high-work-function Au<sub>1-x</sub>Se<sub>x</sub> alloy contacts for high-performance p-type WSe<sub>2</sub> transistors.

Nature communications·2026
Same author

2D self-assembly of phosphorus allotropes on Bi(111).

The Journal of chemical physics·2026
Same author

Correction to "Discovery of a Stripe Phase in an Elemental Solid".

Nano letters·2025
Same author

Charge Transfer-Stabilized SiP Monolayer: An Unexpected Two-Dimensional Honeycomb on Au(111).

Nano letters·2025
Same author

Discovery of a Stripe Phase in an Elemental Solid.

Nano letters·2025

Related Experiment Video

Updated: Jan 26, 2026

Epitaxial Nanostructured &#945;-Quartz Films on Silicon: From the Material to New Devices
11:34

Epitaxial Nanostructured α-Quartz Films on Silicon: From the Material to New Devices

Published on: October 6, 2020

5.9K

Single-Site-Directed Unidirectional Epitaxy of Large-Scale 2D Materials.

Shaogang Xu1,2, Junqiu Zhang3, Yipu Xia4

  • 1State Key Laboratory of Quantum Functional Materials, Department of Physics, and Guangdong Basic Research Center of Excellence for Quantum Science, Southern University of Science and Technology, Shenzhen, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|January 25, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method for growing large-area, single-crystal 2D materials. This technique uses controlled nucleation sites to achieve uniform crystallographic orientation, crucial for advanced electronics and optoelectronics.

Keywords:
first‐principles calculationslarge‐scale 2D materialsmolecular beam epitaxysingle‐site‐directed unidirectional epitaxysubstrate surface activation

More Related Videos

Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates
07:53

Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates

Published on: April 27, 2019

8.7K
Microhoneycomb Monoliths Prepared by the Unidirectional Freeze-drying of Cellulose Nanofiber Based Sols: Method and Extensions
09:20

Microhoneycomb Monoliths Prepared by the Unidirectional Freeze-drying of Cellulose Nanofiber Based Sols: Method and Extensions

Published on: May 24, 2018

9.4K

Related Experiment Videos

Last Updated: Jan 26, 2026

Epitaxial Nanostructured &#945;-Quartz Films on Silicon: From the Material to New Devices
11:34

Epitaxial Nanostructured α-Quartz Films on Silicon: From the Material to New Devices

Published on: October 6, 2020

5.9K
Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates
07:53

Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates

Published on: April 27, 2019

8.7K
Microhoneycomb Monoliths Prepared by the Unidirectional Freeze-drying of Cellulose Nanofiber Based Sols: Method and Extensions
09:20

Microhoneycomb Monoliths Prepared by the Unidirectional Freeze-drying of Cellulose Nanofiber Based Sols: Method and Extensions

Published on: May 24, 2018

9.4K

Area of Science:

  • Materials Science
  • Surface Science
  • Condensed Matter Physics

Background:

  • Large-scale synthesis of van der Waals (vdW) 2D materials is essential for high-performance electronics and optoelectronics.
  • Achieving uniform crystallographic orientation in multi-grain coalescence growth remains a significant challenge.
  • Existing methods struggle to control domain alignment, limiting the integration of 2D materials.

Purpose of the Study:

  • To present an effective strategy for unidirectional epitaxial growth of 2D materials.
  • To demonstrate controllable introduction of single active sites on flat terraces for guided growth.
  • To establish a scalable pathway toward large-scale single-crystal 2D films.

Main Methods:

  • Utilized heteroepitaxy of Molybdenum Diselenide (MoSe2) on Gold (Au)(111) as a model system.
  • Combined molecular beam epitaxy (MBE) with first-principles calculations.
  • Investigated the role of Se adsorption and surface Au atom aggregation into dimers.

Main Results:

  • Demonstrated that Se adsorption disrupts Au(111) reconstruction, forming stable Au dimers.
  • Showcased these dimers as symmetry-breaking nucleation centers guiding unidirectional MoSe2 domain alignment.
  • Clarified how substrate surface activation enhances epitaxial quality of 2D materials.

Conclusions:

  • Established a scalable pathway for large-scale single-crystal 2D film production.
  • Provided a conceptual framework for advancing 2D material epitaxial growth.
  • Overcame the challenge of uniform crystallographic orientation in vdW material synthesis.