Chemical profiling of single nanotubes: Intramolecular p–n–p junctions and on-tube single-electron transistors

Kong, Jing; Cao, Jien; Dai, Hongjie; Anderson, Erik
January 2002
Applied Physics Letters;1/7/2002, Vol. 80 Issue 1, p73
Academic Journal
Electrical transport properties of intramolecular p-n-p junctions formed on individual semiconducting carbon nanotubes are reported. Chemical dopant "profiling" along the length of a nanotube divides the nanotube into two p-doped sections and a central n-doped section. The double p-n junctions formed on the nanotube dictate the electrical characteristics of the system. Well-defined and highly reproducible single-electron transistors with much smaller size than the geometrical length of the nanotube are obtained.


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