Title :
Electronic measurements of alkali metal-encapsulated single-walled carbon nanotubes produced by plasma ion irradiation
Author :
Tzumida, T. ; Hirata, T. ; Hatakeyama, R. ; Neo, Y. ; Mimura, H. ; Omote, K. ; Kasama, Y.
Author_Institution :
Dept. of Electron. Eng., Tohoku Univ., Sendai, Japan
Abstract :
We report detailed experimental results of the electronic transport properties of Cs-encapsulatcd single-walled carbon nanotubes (SWNTs) produced via plasma ion irradiation method. After fabricating field-effect transistor (FET) configuration using pristine and alkali metal ion irradiated SWNTs as channel, the electronic transport properties of these devices are investigated. As a result, pristine semiconducting SWNTs show p-type transport properties. On the other hand, it is clearly observed that Cs-encapsulated semiconducting SWNTs have n-type transport behavior. This phenomenon can be explained in terms of charge transfer from Cs atoms in SWNTs. Moreover, ambipolar property is obtained by measuring Li-encapsulated SWNTs FET.
Keywords :
caesium; carbon nanotubes; electrical conductivity; elemental semiconductors; encapsulation; field effect transistors; lithium; nanotube devices; C; alkali metal-encapsulated single-walled carbon nanotubes; ambipolar property; charge transfer; electronic measurements; electronic transport properties; field-effect transistor configuration; plasma ion irradiation; pristine semiconducting SWNT; Carbon nanotubes; Electrodes; FETs; Nanoscale devices; Nanotechnology; Plasma measurements; Plasma properties; Plasma transport processes; Semiconductivity; Suspensions;
Conference_Titel :
Nanotechnology, 2005. 5th IEEE Conference on
Print_ISBN :
0-7803-9199-3
DOI :
10.1109/NANO.2005.1500791
