Search research articles

ACERCA DE JoVE

Visión General Liderazgo Blog Centro de Ayuda JoVE

AUTORES

Proceso de Publicación Consejo Editorial Alcance y Políticas Revisión por Pares Preguntas Frecuentes Enviar

BIBLIOTECARIOS

Testimonios Suscripciones Acceso Recursos Consejo Asesor de Bibliotecas Preguntas Frecuentes

INVESTIGACIÓN

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archivo

EDUCACIÓN

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Centro de Recursos para Profesores Sitio de Profesores

Términos y Condiciones de Uso

Política de Privacidad

Videos de Conceptos Relacionados

Hydrogen Bonds

Hydrogen Bonds

Hydrogen BondsHydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.Hydrogen Bonds Control the World!Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are...

Bond Energies and Bond Lengths

Bond Energies and Bond Lengths

Stable molecules exist because covalent bonds hold the atoms together. The strength of a covalent bond is measured by the energy required to break it, that is, the energy necessary to separate the bonded atoms. Separating any pair of bonded atoms requires energy — the stronger a bond, the greater the energy required to break it.

Intermolecular Forces

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...

Intermolecular Forces

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...

Hydrogen Bonds

Hydrogen Bonds

A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...

The Electrical Double Layer

The Electrical Double Layer

In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...

También podría leer

Artículos Relacionados

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

Ordenar por

Same author

The Efficiencies and Products of Dilute Methane Oxidation in a Chlorine Radical Photoreactor.

Environmental science & technology·2026

Same author

Exposure to perfluorooctanoic acid accelerates <i>Drosophila melanogaster</i> juvenile development and disrupts mitochondrial metabolism.

bioRxiv : the preprint server for biology·2026

Same author

Direct quantification of the metabolic heat output of individual Drosophila brains.

Cell reports methods·2026

Same author

Exploring Nanoscale Thermal Transport with Microcalorimetric Tools.

Nano letters·2026

Same author

Introduction.

Annual review of chemical and biomolecular engineering·2026

Same author

Severe Treatment-Refractory Macrophage Activation Syndrome: Hemophagocytic Lymphohistiocytosis Presenting With Neurologic Crisis in Systemic Lupus Erythematosus.

Cureus·2026

Search research articles

Video Experimental Relacionado

Updated: Jul 11, 2026

Adhesion Frequency Assay for In Situ Kinetics Analysis of Cross-Junctional Molecular Interactions at the Cell-Cell Interface

Adhesion Frequency Assay for In Situ Kinetics Analysis of Cross-Junctional Molecular Interactions at the Cell-Cell Interface

Published on: November 2, 2011

La termoelectricidad en las uniones moleculares.

Pramod Reddy¹, Sung-Yeon Jang, Rachel A Segalman

¹Applied Science and Technology Program, University of California, Berkeley, CA 94720, USA.

Science (New York, N.Y.)

|February 17, 2007

Resumen

Los investigadores midieron las propiedades termoeléctricas de las uniones moleculares. Encontraron una conducción de tipo p en los sistemas oro-molécula-oro, abriendo puertas para la conversión de energía termoeléctrica molecular.

Más Videos Relacionados

Spatial Separation of Molecular Conformers and Clusters

Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

Molecular Entanglement and Electrospinnability of Biopolymers

Molecular Entanglement and Electrospinnability of Biopolymers

Published on: September 3, 2014

Videos de Experimentos Relacionados

Last Updated: Jul 11, 2026

Adhesion Frequency Assay for In Situ Kinetics Analysis of Cross-Junctional Molecular Interactions at the Cell-Cell Interface

Adhesion Frequency Assay for In Situ Kinetics Analysis of Cross-Junctional Molecular Interactions at the Cell-Cell Interface

Published on: November 2, 2011

Spatial Separation of Molecular Conformers and Clusters

Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

Molecular Entanglement and Electrospinnability of Biopolymers

Molecular Entanglement and Electrospinnability of Biopolymers

Published on: September 3, 2014

Área de la Ciencia:

La electrónica molecular es la electrónica molecular.
Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada
Nanotecnología La nanotecnología es la nanotecnología.

Sus antecedentes:

Los materiales termoeléctricos convierten el calor en electricidad.
Las uniones moleculares ofrecen propiedades electrónicas sintonizables.
Comprender el transporte de carga en sistemas moleculares es crucial.

Objetivo del estudio:

Para medir los coeficientes de Seebeck de las uniones moleculares.
Para determinar el tipo de portador de carga en las heterojunciones oro-molécula-oro.
Explorar el potencial de la conversión de energía termoeléctrica molecular.

Principales métodos:

Atrapar las moléculas (BDT, dibenzenedithiol, tribenzenedithiol) entre los electrodos de oro.
Aplicando una diferencia de temperatura a través de los electrodos.
Junción de medición de los coeficientes de Seebeck a temperatura ambiente.

Principales resultados:

Los coeficientes de Seebeck medidos fueron: +8.7 μV/K (BDT), +12.9 μV/K (4,4'-dibenzenedithiol), +14.2 μV/K (4,4''-tribenzenedithiol) y se obtuvieron los siguientes resultados:
Los coeficientes positivos de Seebeck indican una conducción inequívoca de tipo p (agujero).
Se determinó que el nivel Au Fermi estaba a 1,2 eV por encima del orbital molecular ocupado más alto de BDT.

Conclusiones:

Las uniones moleculares exhiben efectos termoeléctricos significativos.
Se ha demostrado la conducción de tipo p en sistemas oro-molécula-oro.
Destaca el potencial para la recolección de energía termoeléctrica molecular y los estudios de estructura electrónica.