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Photoluminescence changes of C70 nano/submicro-crystals induced by high pressure and high temperature
Umeå University, Faculty of Science and Technology, Department of Physics. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, PR China.ORCID iD: 0000-0003-0462-6206
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2016 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 6, 38470Article in journal (Refereed) Published
Abstract [en]

Hollow C70 nano/submicrocrystals with a fcc lattice structure were treated under various high pressure and high temperature conditions. The energy band structure was visibly changed by the high pressure and high temperature treatment, and the luminescence of the polymerized C70 nano/submicrocrystals was tuned from the visible to the near infrared range. In-situ high pressure experiments at room temperature indicate that pressure plays a key role in the tuning of band gap and PL properties in C70 nanotubes, and temperature plays an important role in the formation of stable intermolecular bonds and thus to define the final red-shift of the PL peaks. The polymeric phases of C70 nanocrystals treated at high pressure and high temperature were identified from Raman spectra, which changed from monomers to a dimer-rich phase and finally to a phase containing larger, disordered C70 oligomers.

Place, publisher, year, edition, pages
Nature Publishing Group, 2016. Vol. 6, 38470
Keyword [en]
High pressure, high temperature, fullerenes, C70, photoluminescence, Raman spectroscopy, dimerization, polymerization, band gap, nanosize
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-128558DOI: 10.1038/srep38470ISI: 000389297600001OAI: oai:DiVA.org:umu-128558DiVA: diva2:1052574
Available from: 2016-12-07 Created: 2016-12-07 Last updated: 2017-01-13Bibliographically approved

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