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29Si and13C Solid-State NMR Spectroscopic Study of Nanometer-Scale Structure and Mass Fractal Characteristics of Amorphous Polymer Derived Silicon Oxycarbide Ceramics

Widgeon, S. J. ; Sen, S. ; Mera, G. ; Ionescu, E. ; Riedel, R. ; Navrotsky, A. (2010)
29Si and13C Solid-State NMR Spectroscopic Study of Nanometer-Scale Structure and Mass Fractal Characteristics of Amorphous Polymer Derived Silicon Oxycarbide Ceramics.
In: Chemistry of Materials, 22 (23)
doi: 10.1021/cm1021432
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

Polymer derived silicon oxycarbide ceramics (SiOC-PDCs) with widely different carbon contents have been synthesized, and their structures have been studied at different length scales using high-resolution 13C and 29Si magic-angle-spinning (MAS) NMR spectroscopic techniques. The data suggest that the structure of these PDCs consists of a continuous mass fractal backbone of corner-shared SiCxO4-x tetrahedral units with “voids” occupied by sp2-hybridized graphitic carbon. The oxygen-rich SiCxO4-x units are located at the interior of this backbone with a mass fractal dimension of 2.5 while the carbon-rich units display a slightly lower dimensionality and occupy the interface between the backbone and the free carbon nanodomains.

Typ des Eintrags: Artikel
Erschienen: 2010
Autor(en): Widgeon, S. J. ; Sen, S. ; Mera, G. ; Ionescu, E. ; Riedel, R. ; Navrotsky, A.
Art des Eintrags: Bibliographie
Titel: 29Si and13C Solid-State NMR Spectroscopic Study of Nanometer-Scale Structure and Mass Fractal Characteristics of Amorphous Polymer Derived Silicon Oxycarbide Ceramics
Sprache: Englisch
Publikationsjahr: 10 November 2010
Verlag: ACS
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Chemistry of Materials
Jahrgang/Volume einer Zeitschrift: 22
(Heft-)Nummer: 23
DOI: 10.1021/cm1021432
Kurzbeschreibung (Abstract):

Polymer derived silicon oxycarbide ceramics (SiOC-PDCs) with widely different carbon contents have been synthesized, and their structures have been studied at different length scales using high-resolution 13C and 29Si magic-angle-spinning (MAS) NMR spectroscopic techniques. The data suggest that the structure of these PDCs consists of a continuous mass fractal backbone of corner-shared SiCxO4-x tetrahedral units with “voids” occupied by sp2-hybridized graphitic carbon. The oxygen-rich SiCxO4-x units are located at the interior of this backbone with a mass fractal dimension of 2.5 while the carbon-rich units display a slightly lower dimensionality and occupy the interface between the backbone and the free carbon nanodomains.

Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 05 Apr 2012 08:53
Letzte Änderung: 05 Mär 2013 10:00
PPN:
Sponsoren: This study was performed within Materials World Network collaborative project “Nanostructure and thermodynamics of polymer-derived ceramics” and was supported by NSF Grant MWN-0907792., Financial support by the Fonds der Chemischen Industrie, Frankfurt (Germany)
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