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Comparación de la forma en la química y el ensamblaje de superátomos

Jingjing Yang¹, Feifan Wang¹, Jake C Russell¹

¹Department of Chemistry, Columbia University, New York, New York 10027, United States.

Journal of the American Chemical Society

|July 1, 2020

Resumen

Los investigadores crearon nuevos sólidos jerárquicos utilizando nanocúmulos superatómicos anisotrópicos. Estas estructuras permiten ajustar el embalaje del cristal y las propiedades ópticas, lo que demuestra una nueva vía para el diseño de materiales avanzados.

Área de la Ciencia:

Ciencias de los materiales
Nanotecnología
Química del estado sólido

Sus antecedentes:

Los nanocúmulos superatómicos ofrecen bloques de construcción únicos para los sólidos jerárquicos.
Las formas anisotrópicas de los nanocúmulos permiten nuevas posibilidades de ensamblaje.

Objetivo del estudio:

Explorar la creación de nuevas arquitecturas superatómicas utilizando nanocúmulos geométricamente anisotrópicos.
Investigar el papel de la anisotropía de la forma en el ensamblaje y las propiedades del estado sólido.

Principales métodos:

Síntesis de nanocúmulos de Co12Se16 y C140 en forma de varilla.
El ensamblaje de nanocúmulos anisotrópicos en nuevas arquitecturas superatómicas.
Caracterización del empaque de cristales, formación de vacíos y propiedades electrónicas.

Principales resultados:

Descubrimiento de nuevas arquitecturas superatómicas a partir de nanocúmulos anisotrópicos.
Observación de estructuras de embalaje no cerradas con huecos que albergan moléculas de disolvente.
Demostración del ajuste del empaque de cristales y las brechas ópticas por moléculas de disolvente intercaladas.
Observación del fenómeno de la conducción eléctrica "encendido".

Conclusiones:

Los nanocúmulos superatómicos anisotrópicos son bloques de construcción versátiles para los sólidos jerárquicos.
La anisotropía de la forma y las moléculas intercaladas proporcionan control sobre la estructura y las propiedades del estado sólido.
Este enfoque ofrece una ruta novedosa para diseñar y ajustar las propiedades de los materiales avanzados.

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