TY - JOUR
T1 - Electrical transport properties of calcium-encapsulated single-walled carbon nanotubes realized using calcium plasma
AU - Shimizu, Tetsuhiro
AU - Kato, Toshiaki
AU - Oohara, Wataru
AU - Hatakeyama, Rikizo
PY - 2010/12/1
Y1 - 2010/12/1
N2 - Calcium (Ca)-atom-encapsulated single-walled carbon nanotubes (Ca@SWNTs) are successfully formed by an ion irradiation method using Ca plasma. The electrical transport properties of Ca@SWNTs are experimentally investigated under a field-effect transistor configuration in vacuum and air. The conductance of Ca@SWNTs changes markedly compared with that of pristine SWNTs, and Ca@SWNTs exhibit air-stable unipolar n-type semiconductor behavior. This result indicates that Ca atoms are encapsulated in SWNTs and fulfill a crucial role as strong electron donors to SWNTs. A unique feature resembling a p-n junction is also observed in Ca@SWNTs.
AB - Calcium (Ca)-atom-encapsulated single-walled carbon nanotubes (Ca@SWNTs) are successfully formed by an ion irradiation method using Ca plasma. The electrical transport properties of Ca@SWNTs are experimentally investigated under a field-effect transistor configuration in vacuum and air. The conductance of Ca@SWNTs changes markedly compared with that of pristine SWNTs, and Ca@SWNTs exhibit air-stable unipolar n-type semiconductor behavior. This result indicates that Ca atoms are encapsulated in SWNTs and fulfill a crucial role as strong electron donors to SWNTs. A unique feature resembling a p-n junction is also observed in Ca@SWNTs.
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U2 - 10.1143/JJAP.49.02BD05
DO - 10.1143/JJAP.49.02BD05
M3 - Article
AN - SCOPUS:79955545752
VL - 49
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 2 PART 2
M1 - 02BD05
ER -