Optical Properties of Ultrashort Semiconducting Single-Walled Carbon Nanotube Capsules Down to Sub-10 nm

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dc.creatorSun, Xiaoming
dc.creatorZaric, Sasa
dc.creatorDaranciang, Dan
dc.creatorWelsher, Kevin
dc.creatorLu, Yuerui
dc.creatorLi, Xiaolin
dc.creatorDai, Hongjie
dc.date2008-04-29
dc.date.accessioned2026-07-07T09:35:54Z
dc.date.available2026-07-07T09:35:54Z
dc.descriptionSingle-walled carbon nanotubes (SWNTs) are typically long (>100 nm) and have been well established as novel quasi one-dimensional systems with interesting electrical, mechanical, and optical properties. Here, quasi zero-dimensional SWNTs with finite lengths down to the molecular scale (7.5 nm in average) were obtained by length separation using a density gradient ultracentrifugation method. Different sedimentation rates of nanotubes with different lengths in a density gradient were taken advantage of to sort SWNTs according to length. Optical experiments on the SWNT fractions revealed that the UV-vis-NIR absorption and photoluminescence peaks of the ultrashort SWNTs blue-shift up to 30 meV compared to long nanotubes, owing to quantum confinement effects along the length of ultrashort SWNTs. These nanotube capsules essentially correspond to SWNT quantum dots.
dc.identifierhttps://arxiv.org/abs/0804.4676
dc.identifierhttp://arxiv.org/abs/0804.4676
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/159988
dc.subjectMaterials Science
dc.titleOptical Properties of Ultrashort Semiconducting Single-Walled Carbon Nanotube Capsules Down to Sub-10 nm
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