Electronic Structures of Single-Walled Carbon Nanotubes Encapsulating Ellipsoidal C70
Authors:
- Toshiya OkazakiTOToshiya Okazaki
- Kaori Hirose-TakaiKHKaori Hirose-Takai
- Kazu SuenagaKSKazu Suenaga
- Susumu OkadaSOSusumu Okada
- Shunji BandowSBShunji Bandow
- Sumio IijimaSISumio Iijima
- 8 October 2010
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 132 (43) , 15252-15258
Abstract
The molecular orientation of ellipsoidal C70 in single-walled carbon nanotubes (SWCNTs) depends on the tube diameter (dt). Photoluminescence (PL) studies reveal that the fullerene encapsulation effects on the optical transition energy of SWCNTs are significantly different for C70 and C60 at dt = 1.405−1.431 nm. This indicates that the transition from the “lying” alignment to the “standing” alignment occurs at dt ≈ 1.41 nm and the electronic states of SWCNTs are very sensitive to the interspacing between the encapsulated molecules and the SWCNTs. The present findings suggest that the electronic structure of SWCNTs is tunable not only by alternating the encapsulated molecules but also by controlling their molecular orientations, thus paving the way for development of novel SWCNT-based devices.Keywords
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