29Si and 13C Solid-state NMR spectroscopic study of nanometer-scale structure and mass fractal characteristics of amorphous polymer derived silicon oxycarbide ceramics

S. J. Widgeon; S. Sen; G. Mera; E. Ionescu; R. Riedel; A. Navrotsky

doi:10.1021/cm1021432

²⁹Si and ¹³C Solid-state NMR spectroscopic study of nanometer-scale structure and mass fractal characteristics of amorphous polymer derived silicon oxycarbide ceramics

S. J. Widgeon, S. Sen, G. Mera, E. Ionescu, R. Riedel, A. Navrotsky

Research output: Contribution to journal › Article › peer-review

152 Scopus citations

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 SiC_xO_4-x tetrahedral units with "voids" occupied by sp²-hybridized graphitic carbon. The oxygen-rich SiC_xO_4-x units are located at the interior of this backbone with a mass fractal dimension of ~2.5 while the carbonrich units display a slightly lower dimensionality and occupy the interface between the backbone and the free carbon nanodomains.

Original language	English (US)
Pages (from-to)	6221-6228
Number of pages	8
Journal	Chemistry of Materials
Volume	22
Issue number	23
DOIs	https://doi.org/10.1021/cm1021432
State	Published - Dec 14 2010
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Chemistry

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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 carbonrich units display a slightly lower dimensionality and occupy the interface between the backbone and the free carbon nanodomains.",

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T1 - 29Si and 13C Solid-state NMR spectroscopic study of nanometer-scale structure and mass fractal characteristics of amorphous polymer derived silicon oxycarbide ceramics

AU - Widgeon, S. J.

AU - Sen, S.

AU - Mera, G.

AU - Ionescu, E.

AU - Riedel, R.

AU - Navrotsky, A.

PY - 2010/12/14

Y1 - 2010/12/14

N2 - 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 carbonrich units display a slightly lower dimensionality and occupy the interface between the backbone and the free carbon nanodomains.

AB - 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 carbonrich units display a slightly lower dimensionality and occupy the interface between the backbone and the free carbon nanodomains.

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²⁹Si and ¹³C Solid-state NMR spectroscopic study of nanometer-scale structure and mass fractal characteristics of amorphous polymer derived silicon oxycarbide ceramics

Abstract

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