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

Electron Behavior01:09

Electron Behavior

9.9K
Electrons are negatively charged subatomic particles attracted to and orbit around the positively-charged nucleus of an atom. They reside in spaces associated with energy levels called shells and are further organized into subshells and orbitals within each shell.
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus have less energy,...
9.9K
Continuous Charge Distributions01:17

Continuous Charge Distributions

7.2K
Imagine a bucket of water. It contains many molecules, of the order of 1026 molecules. Thus, although it contains discrete elements (molecules) at the microscopic level, macroscopically, it can be considered continuous. Small volume elements of water, infinitesimal compared to the bulk of the bucket's volume, still contain many molecules. Under this framework, quantized matter is approximated as continuous for practical purposes.
The electric charge can also be subjected to an analogical...
7.2K
Electric Field of Two Equal and Opposite Charges01:30

Electric Field of Two Equal and Opposite Charges

6.3K
Atoms generally contain the same number of positively and negatively charged particles, protons, and electrons. Hence, they are electrically neutral. However, the centers of the positive and negative charges do not always coincide. In such a scenario, the electric field of an atom may not be zero.
A separation of the positive and negative charges can lead to a weak, remnant effect of the positive and negative charges. The expectation is that the more the distance between the positive and...
6.3K
Sources and Properties of Electric Charge01:15

Sources and Properties of Electric Charge

10.7K
All objects we see around us consist of atoms, which combine to form molecules. The lightest element in the universe is hydrogen, and a hydrogen atom consists of a positively charged proton and a negatively charged electron. The magnitude of charge that a proton and an electron carry are the same, and it is the fundamental unit of charge. In SI units, it is 1.602 times 10-19 coulomb.
Most atoms additionally constitute another fundamental particle, the neutron. It carries no electrical charge. A...
10.7K
The Pauli Exclusion Principle03:06

The Pauli Exclusion Principle

49.9K
The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
49.9K
Electronic Structure of Atoms02:28

Electronic Structure of Atoms

24.2K

An atom comprises protons and neutrons, which are contained inside the dense, central core called the nucleus, with electrons present around the nucleus. Taking into account the wave–particle duality of electrons and the uncertainty in position around the nucleus, quantum mechanics provides a more accurate model for the atomic structure. It describes atomic orbitals as the regions around the nucleus where electrons of discrete energy exist, characterized by four quantum...
24.2K

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Enhancement of the Biexciton Binding Energy in Laterally Confined CdSe Nanoplatelets.

Nano letters·2025
Same author

Cationic Polyelectrolyte Adsorption onto Anionic Nanoparticles Analyzed with Frequency-Domain Scanning Fluorescence Correlation Spectroscopy.

Small methods·2025
Same author

Blue CdSe/CdS core/crown nanoplatelet light-emitting diodes obtained <i>via</i> a design-of-experiments approach.

Nanoscale·2024
Same author

Selenium reduction pathways in the colloidal synthesis of CdSe nanoplatelets.

Nanoscale·2024
Same author

Coherent Spin Dynamics of Electrons in CdSe Colloidal Nanoplatelets.

Nanomaterials (Basel, Switzerland)·2023
Same author

Nonlocality, Superposition, and Time in the 4+1 Formalism.

Entropy (Basel, Switzerland)·2023

Video Experimental Relacionado

Updated: Sep 10, 2025

Compact Quantum Dots for Single-molecule Imaging
17:14

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

18.2K

Caracterización de la carga elemental de los puntos cuánticos individuales en la solución

Sumit Sumit1, Lucas Oorlynck1, Marieke Eliano1

  • 1Department of electronics and information systems, Ghent University, Tech Lane Ghent Science Park - Campus A 126, Ghent 9052, Belgium.

Nano letters
|August 20, 2025
PubMed
Resumen

Los investigadores midieron con precisión la carga eléctrica de los puntos cuánticos individuales de selenuro de cadmio / sulfuro de cadmio (CdSe / CdS) en el líquido. Este avance permite estudiar los efectos de carga en los puntos cuánticos a nivel de una sola partícula en solución.

Palabras clave:
La electrometríaLa electroforesisMicroscopía de escaneo por láserPuntos Cuánticos

Más Videos Relacionados

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

9.8K
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

7.6K

Videos de Experimentos Relacionados

Last Updated: Sep 10, 2025

Compact Quantum Dots for Single-molecule Imaging
17:14

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

18.2K
All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

9.8K
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

7.6K

Área de la Ciencia:

  • Nanotecnología
  • Ciencias de los materiales
  • Química Física

Sus antecedentes:

  • La comprensión de las propiedades de los puntos cuánticos (QD) a nivel de una sola partícula es crucial para el avance de las tecnologías QD.
  • Caracterizar los QD en sus entornos líquidos nativos presenta desafíos significativos.

Objetivo del estudio:

  • Para medir con precisión la carga eléctrica de los puntos cuánticos individuales del núcleo y la cáscara de CdSe/CdS en un entorno líquido no polar.
  • Explorar la relación entre el tamaño de QD, el estado de carga y la movilidad electroforética.

Principales métodos:

  • Microscopía de barrido láser combinada con electroforesis de alto campo.
  • Analizó las movilidades electroforéticas de puntos cuánticos individuales.
  • Utilizó un modelo de carga termodinámica.

Principales resultados:

  • Se midió con éxito la carga eléctrica de 15 nm y 25 nm CdSe/CdS QD con precisión en el nivel de carga elemental.
  • Se observó un claro agrupamiento de movilidades electroforéticas, lo que indica estados de carga discretos.
  • El modelo de carga termodinámica capturó con precisión las distribuciones de carga observadas y la dependencia de tamaño.

Conclusiones:

  • Este trabajo demuestra un método poderoso para caracterizar puntos cuánticos individuales en solución.
  • Permite el estudio de los fenómenos ópticos y electrónicos dependientes de la carga a nivel de un solo QD.
  • Avanza la comprensión y la aplicación fundamentales de los puntos cuánticos.