▎ 摘　　要

NOVELTY - Preparing ultra-narrow graphene nanoribbons involves subjecting single-walled carbon nanotubes to heat treatment at 350-500 degrees C to open port, and heat treatment time is 0.5-2 hours. The heat treatment is performed in an atmosphere containing oxygen. The single-walled carbon nanotubes obtained is mixed with the molecules used for filling and then performs vacuum sealing. The single-walled carbon nanotubes obtained are filled into glass tubes or quartz tubes together with molecules for filling. The mechanical pump or molecular pump is used to evacuate the glass tube or quartz tube, vacuum reaches 10-1 pascal. The high-temperature flame welding torch is used to seal the glass tube or quartz tube. The high temperature heat treatment is performed on the molecule-filled single-walled carbon nanotubes obtained. The temperature is reduced to room temperature to obtain single-walled carbon nanotube sample filled with molecules, performs annealing heat treatment. USE - Method for preparing ultra-narrow graphene nanoribbons. ADVANTAGE - The method enables to prepare ultra-narrow graphene nanoribbons that controls and synthesizes various types of ultra-narrow armchair and zigzag graphene nanoribbons. DETAILED DESCRIPTION - Preparing ultra-narrow graphene nanoribbons involves subjecting single-walled carbon nanotubes to heat treatment at 350-500 degrees C to open port, and heat treatment time is 0.5-2 hours. The heat treatment is performed in an atmosphere containing oxygen. The single-walled carbon nanotubes obtained is mixed with the molecules used for filling and then performs vacuum sealing. The single-walled carbon nanotubes obtained are filled into glass tubes or quartz tubes together with molecules for filling. The mechanical pump or molecular pump is used to evacuate the glass tube or quartz tube, vacuum reaches 10-1 pascal. The high-temperature flame welding torch is used to seal the glass tube or quartz tube. The high temperature heat treatment is performed on the molecule-filled single-walled carbon nanotubes obtained. The temperature is reduced to room temperature to obtain single-walled carbon nanotube sample filled with molecules, performs annealing heat treatment. The molecules filled in the single-walled carbon nanotubes are converted into graphene nanoribbons. The single-walled carbon nanotube sample filled with molecules obtained is subjected to high-temperature annealing in inert gas atmosphere or in vacuum, processing temperature is 200-1500 degrees C, and annealing time is 0.5-2 hours, after cooling down to room temperature to obtain final product.