Method for preparing oriented graphene nanoribbon (GNR) array

Abstract

The invention discloses a method for preparing an oriented graphene nanoribbon array. As one of optimized schemes, the method includes the following steps of (1) depositing nano-metal catalyst particles on a substrate surface which is subjected to a polishing process; (2) growing a directionally distributed carbon nanotube on the substrate surface; (3) depositing a thin layer hydrogen front metal film on the substrate surface; and (4) processing the substrate surface with an acid solution and dissecting the carbon nanotube along the axial direction to form the graphene nanoribbon array. The method for preparing the oriented graphene nanoribbon array has the advantages that the process is simple, the method is easy to implement, the prepared GNR has a high directionality, a high density, low in-plane defect density and edge disorder and a high electron mobility, the density and the like of the GNR array can be controlled through a growth technology and an etching process of a directional carbon tube, simultaneously a device based on the GNR array has a good electrical conduction performance, and the method has a significant application prospect in fields of spintronics, sensors, transistors and the like.

Description

technical field [0001] The invention relates to a method for preparing graphene materials, in particular to a method for preparing graphene nanobelts by chemical reaction etching. Background technique [0002] Graphene nanoribbons (GNRs) possess novel electronic and spin-conducting properties, such as quantum-confined band gaps and edge magnetic ordering, and are expected to have important applications in field-effect transistors, spintronics, and sensors. , so it has attracted more and more attention from researchers. Currently, there are three main methods to fabricate GNRs: 1) bottom-up assembly; 2) photolithography or plasma etching of graphite and carbon nanotubes (CNTs); 3) strong oxidation or gas expansion to split multi-walled carbon nanotubes. Tube. Among these methods, dissection of multi-walled carbon nanotubes (MOL.LWNTs) provides a promising way to fabricate narrow-width GNRs. However, in-plane defects and rough edges of GNRs may be caused by photolithography...

AI Technical Summary

Problems solved by technology

Based on the above, the current method of preparing GNRs has the following insurmountable problems: the randomness of the arrangement of GNRs makes it difficult to integrate devices in the future; the wide GNRs make it difficult to maximize the performance of GNR devices

Therefore, finding a more suitable method to fabricate GNRs with high quality, smooth edges, and narrow width (several nanometers) remains a great challenge.

Images