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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
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El óxido de grafeno: un material de uno o dos componentes

Anton Naumov1, Fabian Grote2, Marc Overgaard3

  • 1Department of Physics and Astronomy, Texas Christian University , TCU Box 298840, Fort Worth, Texas 761291, United States.

Journal of the American Chemical Society
|August 16, 2016
PubMed
Resumen
Este resumen es generado por máquina.

Se probaron modelos de estructura de óxido de grafeno. Los resultados muestran óxido de grafeno

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Área de la Ciencia:

  • Ciencias de los materiales
  • Nanotecnología
  • Química

Sus antecedentes:

  • Se debate la estructura del óxido de grafeno (GO), con modelos centrados en grupos funcionales o en un sistema de núcleo adsorbente.
  • El papel de los residuos oxidativos (OD) en las propiedades ópticas del GO es un punto clave de discusión.

Objetivo del estudio:

  • Investigar la validez del modelo de dos componentes del óxido de grafeno (GO).
  • Determinar si los desechos oxidativos adsorbidos influyen significativamente en las propiedades ópticas del GO.

Principales métodos:

  • Preparación de GO de baja funcionalización y desechos oxidativos (OD).
  • Creación de un sistema artificial de dos componentes que combine el GO y el OD.
  • Análisis de las propiedades ópticas mediante espectros de absorción/emisión y mediciones de la vida útil.

Principales resultados:

  • Las propiedades ópticas del sistema combinado difieren significativamente de las del GO puro.
  • Los datos experimentales contradicen el modelo que atribuye las propiedades ópticas del GO a la DO adsorbida.

Conclusiones:

  • Las propiedades ópticas del óxido de grafeno son intrínsecas a su marco de carbono oxigenado, no adsorbido OD.
  • Esto confirma los modelos estructurales establecidos y permite una interpretación fiable de las propiedades del GO.
  • Los hallazgos facilitan el procesamiento controlado del óxido de grafeno para aplicaciones avanzadas.