Production
Large quantities of width controlled GNRs can be produced via graphite nanotomy process shown by Berry group, where sharp diamond knife application on graphite produces graphite nanoblocks, which are exfoliated to produce GNRs. GNRs can also be produced by unzipping or cutting open nanotubes. In one such method by Tour group multi-walled carbon nanotubes were unzipped in solution by action of potassium permanganate and sulfuric acid. In another method by Dai group GNRs were produced by plasma etching of nanotubes partly embedded in a polymer film. More recently, graphene nanoribbons have been grown onto silicon carbide (SiC) substrates using ion implantation followed by vacuum or laser annealing. The latter technique allows one to write any pattern onto SiC substrates with 5 nm precision.
Read more about this topic: Graphene Nanoribbons
Famous quotes containing the word production:
“... this dream that men shall cease to waste strength in competition and shall come to pool their powers of production is coming to pass all over the earth.”
—Jane Addams (1860–1935)
“Every production of an artist should be the expression of an adventure of his soul.”
—W. Somerset Maugham (1874–1965)
“The problem of culture is seldom grasped correctly. The goal of a culture is not the greatest possible happiness of a people, nor is it the unhindered development of all their talents; instead, culture shows itself in the correct proportion of these developments. Its aim points beyond earthly happiness: the production of great works is the aim of culture.”
—Friedrich Nietzsche (1844–1900)