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Werner Heisenberg considered the limits of how accurately one can measure properties of an electron or other microscopic particles. He determined that there is a fundamental limit to how accurately one can measure both a particle’s position and its momentum simultaneously. The more accurate the measurement of the momentum of a particle is known, the less accurate the position at that time is known and vice versa. This is what is now called the Heisenberg uncertainty principle. He...
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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...
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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...
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This lesson delves into the geometry of a radical, which is influenced by the electronic structure of the molecule. The principle is similar to that of a lone pair, where the unpaired electron influences the geometry at the radical center.
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The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...
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Estudio Tetra-Germánico desde los Primeros Principios: Estructura, Electrónica, Mecánica y Vibraciones.

Phi M Nguyen1, Hai Hoang2,3, Vladimir Bubanja4,5

  • 1Ho Chi Minh City University of Technology (HCMUT), VNU-HCM, Ho Chi Minh City 700000, Vietnam.

ACS omega
|February 9, 2026
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El tetragermaneno exhibe una estabilidad de cohesión y una conductividad metálica superiores en comparación con el germaneno hexagonal. Sus propiedades mecánicas anisotrópicas y su mejor rendimiento térmico lo hacen prometedor para la nanoelectrónica de próxima generación y los dispositivos fonónicos.

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Área de la Ciencia:

  • Ciencia de los materiales Ciencia de los materiales.
  • Física de la materia condensada Física de la materia condensada
  • Química computacional es la química computacional.

Sus antecedentes:

  • Se exploran materiales bidimensionales (2D) como el germaneno para aplicaciones electrónicas avanzadas.
  • Comprender las propiedades de los nuevos germanenos alotrópicos es crucial para el diseño de materiales.

Objetivo del estudio:

  • Investigar teóricamente las propiedades estructurales, electrónicas, mecánicas y térmicas del tetragermaneno.
  • Para comparar el tetragermaneno con el germaneno hexagonal para posibles aplicaciones.

Principales métodos:

  • Cálculos de la Teoría Funcional de Densidad (DFT) para la optimización estructural y el análisis de propiedades.
  • Simulaciones de Dinámica Molecular (DM) para obtener la célula unitaria rectangular abrochada inicial.
  • Análisis de la estructura de la banda electrónica, densidad de estados, poblaciones orbitales, módulos elásticos y dispersiones de fonones.

Principales resultados:

  • Estructura de tetragermaneno optimizada con constantes de red específicas, altura de curvatura y alta energía de cohesión (5.14 eV / átomo).
  • Comportamiento electrónico metálico sin cruces de Dirac, con participación menor en la órbita d y mayor coordinación.
  • Anisotrópico en el plano Young's y bulk moduli indicando moderada rigidez y flexibilidad.
  • Dispersiones de fonones estables y mejor rendimiento térmico en comparación con el germaneno hexagonal.

Conclusiones:

  • El tetragermaneno demuestra una estabilidad cohesiva y una conductividad metálica significativas.
  • Su elasticidad anisotrópica y propiedades térmicas favorables sugieren un potencial para la nanoelectrónica, la eficiencia energética y los dispositivos fonónicos.
  • El tetragermaneno es un candidato prometedor para canales conductores ajustables a la tensión y vías térmicas.