| Electrodynamic and Excitonic Intertube Interactions in Semiconducting Carbon Nanotube Aggregates. | |
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MedLine Citation:
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PMID: 21391554 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The optical properties of selectively aggregated, nearly single chirality single-wall carbon nanotubes were investigated by both continuous-wave and time-resolved spectroscopies. With reduced sample heterogeneities, we have resolved aggregation-dependent reductions of the excitation energy of the S(1) exciton and enhanced electron-hole pair absorption. Photoluminescence spectra revealed a spectral splitting of S(1) and simultaneous reductions of the emission efficiencies and nonradiative decay rates. The observed strong deviations from isolated tube behavior are accounted for by enhanced screening of the intratube Coulomb interactions, intertube exciton tunneling, and diffusion-driven exciton quenching. We also provide evidence that density gradient ultracentrifugation can be used to structurally sort single-wall carbon nanotubes by aggregate size as evident by a monotonic dependence of the aforementioned optical properties on buoyant density. |
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Authors:
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Jared J Crochet; Jay D Sau; Juan G Duque; Stephen K Doorn; Marvin L Cohen |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-10 |
Journal Detail:
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Title: ACS nano Volume: - ISSN: 1936-086X ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101313589 Medline TA: ACS Nano Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Center for Integrated Nanotechnologies, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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