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Videos de Conceptos Relacionados

The Aufbau Principle and Hund's Rule03:02

The Aufbau Principle and Hund's Rule

To determine the electron configuration for any particular atom, we can build the structures in the order of atomic numbers. Beginning with hydrogen, and continuing across the periods of the periodic table, we add one proton at a time to the nucleus and one electron to the proper subshell until we have described the electron configurations of all the elements. This procedure is called the aufbau principle, from the German word aufbau (“to build up”). Each added electron occupies the subshell of...
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Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
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The hybridized nitrogen atom in amines possesses a lone pair of electrons and is bound to three substituents with a bond angle of around 108°, which is less than the tetrahedral angle of 109.5°. However, the C–N–H bond angle is slightly larger at 112°, with a carbon–nitrogen bond length of 147 pm. This carbon–nitrogen bond length of of amines is longer than the carbon–oxygen bond of alcohols (143 pm) but shorter than alkanes’ carbon–carbon bond (154 pm). These aspects are illustrated in Figure...
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The formation constant, K1, for the formation of Cd(NH3)2+ complex from cadmium and ammonia is 3.55 × 102. Log K1 (i.e. pNH3) is 2.55, and...

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Color Estructural Ajustable en Metamateriales Hiperbólicos Unidimensionales Basados en Au

Ricardo Téllez-Limón1, René I Rodríguez-Beltrán1, Fernando López-Rayón2

  • 1SECIHTI-Centro de Investigación Científica y de Educación Superior de Ensenada, Unidad Académica Monterrey, Alianza Centro 504, PIIT, Apodaca 66629, Nuevo León, Mexico.

Nanomaterials (Basel, Switzerland)
|December 24, 2025
PubMed
Resumen

La coloración estructural en metamateriales de oro se puede ajustar finamente ajustando los parámetros estructurales. Esta investigación demuestra propiedades de color controlables en metamateriales hiperbólicos unidimensionales (1D-HMM) para aplicaciones fotónicas.

Palabras clave:
metamaterialesmetafotónicanano-ópticacolor estructural

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Área de la Ciencia:

  • Nanofotónica
  • Ciencia de los materiales
  • Óptica

Sus antecedentes:

  • La coloración estructural a partir de interacciones luz-materia a nanoescala es un área clave de investigación en nanofotónica.
  • Los metales nobles como el oro ofrecen propiedades plasmónicas pero a menudo requieren nanoestructuras complejas para la coloración.
  • Los métodos escalables para colores estructurales sintonizables son cruciales para las tecnologías fotónicas modernas.

Objetivo del estudio:

  • Demostrar experimental y numéricamente la sintonización fina del color estructural en metamateriales hiperbólicos unidimensionales basados en oro (1D-HMM).
  • Investigar el impacto de la variación de los parámetros estructurales (número de capas N, período T, fracción de llenado p) en las propiedades del color.

Principales métodos:

  • Fabricación y caracterización de 1D-HMM basados en oro.
  • Simulaciones numéricas para modelar las interacciones luz-materia y la respuesta del color.
  • Variación sistemática de los parámetros estructurales (N, T, p) para analizar su efecto en el color.

Principales resultados:

  • La variación del número de capas (N) afecta principalmente la luminancia con cambios mínimos en la cromaticidad.
  • Los cambios en el período (T) causan desplazamientos moderados del color sin afectar la luminancia.
  • La modificación de la fracción de llenado (p) conduce a los cambios más significativos, aunque no monotónicos, en la cromaticidad.

Conclusiones:

  • Los 1D-HMM basados en oro ofrecen una plataforma sintonizable para la coloración estructural.
  • Los parámetros estructurales proporcionan un control distinto sobre la luminancia y la cromaticidad.
  • Estos hallazgos respaldan el desarrollo de dispositivos fotónicos avanzados que utilizan colores controlados basados en oro.