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Raman characterization and UV optical absorption studies of surface plasmonresonance in multishell nanographite
Umeå University, Faculty of Science and Technology, Department of Physics.
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2011 (English)In: Diamond and related materials, ISSN 0925-9635, Vol. 20, no 2, 205-209 p.Article in journal (Refereed) Published
Abstract [en]

Nanographite (NG) particles were produced by annealing of superpurified detonation nanodiamonds (grain size ~ 5 nm) at 1600 °C. The aim of this research was to provide Raman characterization of nanographites obtained and to investigate characteristic features of UV optical absorption in NG suspensions caused by the excitation of surface plasmon resonance (SPR) and its dependence on disorder and defectiveness of graphene shells during their transformation. The 1-st and 2-nd order Raman spectra of the NG samples excited at 514 nm were analyzed. Two different approaches applied for evaluation of the in-plane NG crystallite sizes by using the D- and G-band intensities ratio gave quite different results (~ 3.5 nm and ~ 5.5 nm) reflecting, most likely, a complicated NG structure. The changes in both intensity and position of SPR absorption peak for water suspension of NG particles may originate in structural imperfections and/or changes in aggregation of NG particles.

Place, publisher, year, edition, pages
Elsevier , 2011. Vol. 20, no 2, 205-209 p.
Keyword [en]
nanographite, zigzag edges, grain boundaries, raman characterization, UV optical absorption
URN: urn:nbn:se:umu:diva-39627DOI: 10.1016/j.diamond.2010.12.006OAI: diva2:394510
Available from: 2011-02-02 Created: 2011-02-02 Last updated: 2011-02-04Bibliographically approved

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Makarova, TatianaChungong, L. F.
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