Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

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

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
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

Video Experimental Relacionado

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

Epítome Unidireccional Dirigido por un Solo Sitio de Materiales 2D a Gran Escala

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
Resumen

Los investigadores desarrollaron un nuevo método para cultivar materiales 2D de un solo cristal a gran escala. Esta técnica utiliza sitios de nucleación controlados para lograr una orientación cristalográfica uniforme, crucial para la electrónica avanzada y la optoelectrónica.

Palabras clave:
cálculos de primeros principiosmateriales 2D a gran escalaepitaxia de haz molecularepitaxia unidireccional dirigida por un solo sitioactivación de la superficie del sustrato

Más Videos Relacionados

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

Videos de Experimentos Relacionados

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

Área de la Ciencia:

  • Ciencia de Materiales
  • Ciencia de Superficies
  • Física de la Materia Condensada

Sus antecedentes:

  • La síntesis a gran escala de materiales 2D de van der Waals (vdW) es esencial para la electrónica y la optoelectrónica de alto rendimiento.
  • Lograr una orientación cristalográfica uniforme en el crecimiento por coalescencia de múltiples granos sigue siendo un desafío importante.
  • Los métodos existentes luchan por controlar la alineación de los dominios, lo que limita la integración de los materiales 2D.

Objetivo del estudio:

  • Presentar una estrategia eficaz para el crecimiento epitaxial unidireccional de materiales 2D.
  • Demostrar la introducción controlable de sitios activos únicos en terrazas planas para el crecimiento guiado.
  • Establecer una vía escalable hacia películas 2D de un solo cristal a gran escala.

Principales métodos:

  • Se utilizó la heteroepitaxia de diselenuro de molibdeno (MoSe2) sobre oro (Au)(111) como sistema modelo.
  • Se combinó la epitaxia de haz molecular (MBE) con cálculos de primeros principios.
  • Se investigó el papel de la adsorción de Se y la agregación de átomos de Au de la superficie en dímeros.

Principales resultados:

  • Se demostró que la adsorción de Se interrumpe la reconstrucción de Au(111), formando dímeros de Au estables.
  • Se exhibieron estos dímeros como centros de nucleación que rompen la simetría, guiando la alineación unidireccional del dominio de MoSe2.
  • Se aclaró cómo la activación de la superficie del sustrato mejora la calidad epitaxial de los materiales 2D.

Conclusiones:

  • Se estableció una vía escalable para la producción de películas 2D de un solo cristal a gran escala.
  • Se proporcionó un marco conceptual para avanzar en el crecimiento epitaxial de materiales 2D.
  • Se superó el desafío de la orientación cristalográfica uniforme en la síntesis de materiales vdW.