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Logran método para cortar grafeno con precisión con la ayuda de un nanorobot

Logran método para cortar grafeno con precisión con la ayuda de un nanorobot

El profesor Liu Lianqing del State Key Laboratory of Robotics, la Academia China de Ciencias y el profesor Xi Ning de la Universidad Estatal de Michigan en Estados Unidos, han llevado a cabo una nueva investigación para superar este desafío.

El trabajo, titulado ‘Corte controlado del grafeno, mediante un nanorobot basado en un microscopio de fuerza atómica’, ha sido publicado en ‘Scientia Sinica‘.

Al día de hoy se han explorado muchos métodos de modelado de grafeno, tales como; el corte catalítico, el microscopio de sonda de barrido, el corte mediante un haz de energía, o las técnicas fotocatalíticas, estos métodos actuales pueden cortar el grafeno a medida, sin embargo, la falta de respuesta del sensor a tiempo real durante el modelado del grafeno, limitaba la precisión del corte reduciendo la eficiencia de la fabricación de dispositivos.

Los científicos investigaron métodos de corte controlado de grafeno, basados en registros de fuerza a nanoescala, añadiendo al robot patrones de percepción y de comportamiento, conductores, y un microscopio de fuerza atómica.

Además, observaron que las fuerzas de corte están ligadas a la dirección de corte de la capa de grafeno, lo que se debe a la asimetría de la estructura cristalina del material. Este descubrimiento permitirá que se utilicen las fuerzas a nanoescala como información, en tiempo real, para cortar el grafeno con control.

La microscopía de fuerza atómica es sólo una herramienta de observación de escala nanométrica, y sus principales deficiencias son su mala capacidad de ubicarse correctamente, la falta de información en tiempo real, y la baja eficiencia. Estos problemas se resuelven gracias a una robótica eficaz en la nanomanipulación.

Concretamente, en la investigación la relación entre la dirección del corte de las capas y las fuerzas de corte a nanoescala, fue estudiada de manera sistemática, mediante la rotación de la muestra en las mismas condiciones de corte. Los resultados experimentales mostraron que la fuerza de corte está relacionada con la dirección del mismo.

Combinada con las tecnologías existentes, la técnica desarrollada en este trabajo permitirá fabricar nanodispositivos de grafeno a gran escala, y a bajo costo, con alta eficiencia.

This shows graphene cutting results based on a nanorobot. / ©Science China Press

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