- Conference date: 27 Feb-6 Mar 1999
- Location: Kirchberg, Tirol (Austria)
We have studied the effects of charge transfer on the transport properties of individual single-walled nanotubes. This was done in two ways. In the first, we expose devices made of individual nanotubes to alkali metal vapor. This causes no change in the conductance of devices made of metallic tubes, while it increases the conductance of semiconducting tubes and causes them to change from p-type to n-type. In the second method, we examine a single semiconducting nanotube over three leads with an impurity particle near one lead. Local charge transfer from the impurity to the tube causes the region with the impurity to act as a diode, while the other, ‘clean’, half displays symmetric transport behavior.
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