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Modificación química del grafeno epitaxial: injertos espontáneos de grupos arilo

Elena Bekyarova¹, Mikhail E Itkis, Palanisamy Ramesh

¹Center for Nanoscale Science and Engineering, Department of Chemistry, University of California, Riverside, California 92521, USA.

Journal of the American Chemical Society

|January 29, 2009

Resumen

La unión covalente de los grupos nitrofenilo con el grafeno epitaxial de pocas capas (EG) transformó sus propiedades electrónicas. Esta modificación desplazó el material.

Área de la Ciencia:

Ciencia de los materiales Ciencia de los materiales.
Física de la materia condensada Física de la materia condensada
Química de las superficies.

Sus antecedentes:

El grafeno epitaxial de pocas capas (EG) exhibe propiedades electrónicas casi metálicas.
La funcionalización de la superficie es una estrategia clave para ajustar las características del grafeno.

Objetivo del estudio:

Investigar el impacto de la adición del grupo nitrofenilo en la estructura electrónica y las propiedades de transporte del grafeno epitaxial.
Establecer un método para modificar covalentemente las superficies de grafeno.

Principales métodos:

Formación de enlaces covalentes carbono-carbono entre grupos nitrofenilo y grafeno epitaxial de pocas capas.
Análisis de cambios en la estructura electrónica y propiedades de transporte.

Principales resultados:

Adhesión covalente exitosa de grupos nitrofenílicos a la superficie epitaxial del grafeno.
Un cambio significativo en la estructura electrónica de un comportamiento casi metálico a un comportamiento semiconductor.
Características de transporte de carga alteradas debido a la modificación de la superficie.

Conclusiones:

La funcionalización covalente con grupos nitrofenilo modifica efectivamente las propiedades electrónicas del grafeno epitaxial de pocas capas.
La transformación a un estado semiconductor abre posibilidades para nuevos dispositivos electrónicos basados en grafeno.

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