Change search
ReferencesLink to record
Permanent link

Direct link
Photoluminescence properties of high-pressure-polymerized C60 nanorods in the orthorhombic and tetragonal phases.
Show others and affiliations
2006 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 89, no 18, 181925- p.Article in journal (Refereed) Published
Abstract [en]

C60nanorods in two polymeric phases have been synthesized under differenthigh pressure and high temperature conditions. Orthorhombic and tetragonal phaseshave been identified from Raman spectra. The rod shape canbe kept under quasihydrostatic pressure. The photoluminescence intensity of thepolymeric C60 nanorods has been greatly enhanced compared with thatof pristine C60 nanorods. The main fluorescence band shifted from730  nm in the unpolymeric phase to 748  nm and near infrared780  nm in the orthorhombic and tetragonal phases, respectively. The enhancedphotoluminescence with tunable frequency for different polymeric C60 nanorods suggestspotential applications in luminescent nanomaterials.

Place, publisher, year, edition, pages
2006. Vol. 89, no 18, 181925- p.
Keyword [en]
C60, fullerenes, high pressure, polymers, nanorods, photoluminiscence, Raman spectroscopy, orthorhombic, tetragonal
National Category
Condensed Matter Physics
URN: urn:nbn:se:umu:diva-11949DOI: 10.1063/1.2378396OAI: diva2:151620

Agnieszka Iwasiewicz-Wabnig

Available from: 2007-11-05 Created: 2007-11-05 Last updated: 2015-09-28Bibliographically approved
In thesis
1. Studies of carbon nanomaterials based on fullerenes and carbon nanotubes
Open this publication in new window or tab >>Studies of carbon nanomaterials based on fullerenes and carbon nanotubes
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Materials based on fullerenes and carbon nanotubes are very much different from most “traditional” materials, primarily because they are built from nanosized molecules with highly symmetry-dependent properties. Being the subject of a very active research field over the last twenty years, carbon nanostructures proved to be indeed extraordinary. Their splendid mechanical properties attract a great interest among material scientists. Their wide range of electrical properties, from ballistic conductors to insulators, makes them ideal candidates for future, better electronics. The possibilities seem to be nearly unlimited, with proposed applications ranging from quantum computing to medicine. However, in order to make it all happen one day, we first need to explore and understand the physics and chemistry of carbon nanomaterials. This work focuses on production and characterization of materials and structures in which fullerenes and/or carbon nanotubes are the main ingredients, and which can be produced or modified under high-pressure – high-temperature (hp-hT) conditions. Raman and photoluminescence spectroscopy, X-ray diffraction and scanning probe microscopy were employed for characterization of the samples. The research presented in this thesis is spread over a rather wide range of carbon nanomaterials. To highlight some of the main results – the first hp-hT polymerization of C60 nanorods and the C60-cubane compound is reported. The polymerization mechanism in the latter case was identified to be radically different from that in pure C60. The pressure-temperature diagram of C60-cubane is presented. A comparative study of C60 and C70 peapods under extreme p-T conditions reveals how the confinement affects the fullerenes’ ability for polymerization. Finally, in situ resistance measurements on Rb4C60 under high pressure show that the semiconducting character of this material persists at least up to 2 GPa, contradicting earlier reports on the existence of an insulator-to-metal transition and providing an insight into conduction mechanisms in this anomalous intercalated compound.

Place, publisher, year, edition, pages
Umeå: Fysik, 2007. 115 p.
fullerenes, carbon nanotubes, fullerene polymers, intercalation compounds, high pressure, Raman spectroscopy, X-ray diffraction, atomic force microscopy, phase transitions
National Category
Other Engineering and Technologies not elsewhere specified
urn:nbn:se:umu:diva-1312 (URN)978-91-7264-346-8 (ISBN)
Public defence
2007-09-24, KB3A9, KBC-huset, Umeå Universitet, Umeå, 10:00 (English)
Available from: 2007-08-28 Created: 2007-08-28 Last updated: 2015-09-28Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Yao, MingguangIwasiewicz, AgnieszkaSundqvist, Bertil
By organisation
Department of Physics
In the same journal
Applied Physics Letters
Condensed Matter Physics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 46 hits
ReferencesLink to record
Permanent link

Direct link