Chemical Separation of Metallic and Semiconducting SWNTs
Metallic and semiconducting carbon nanotubes generally coexist in as-grown materials. To get only semiconducting or only metallic nanotubes selective functionalization of metallic SWNTs via 4-hydroxybenzene diazonium can be used. Separation can be done in solution by deprotonation of the p-hydroxybenzene group on the reacted nanotubes (metallic) in alkaline solution followed by electrophoretic separation of these charged species from the neutral species (semiconducting nanotubes). This followed by annealing would give separated pristine semiconducting and metallic SWNT.
Read more about this topic: Selective Chemistry Of Single-walled Nanotubes
Famous quotes containing the words chemical, separation and/or metallic:
“We do not want actions, but men; not a chemical drop of water, but rain; the spirit that sheds and showers actions, countless, endless actions.”
—Ralph Waldo Emerson (1803–1882)
“The legislative powers of government reach actions only, and not opinions, ... thus building a wall of separation between Church and State.”
—Thomas Jefferson (1743–1826)
“The voice of America has no undertones or overtones in it. It repeats its optimistic catchwords in a tireless monologue that has the slightly metallic sound of a gramophone.”
—Vance Palmer (1885–1959)