Positron annihilation lifetime study of organic-inorganic hybrid materials prepared by irradiation

Djourelov, N.; Suzuki, Takenori; Misheva, M.; Margaça, F.M.A.; Salvado, Isabel M. Miranda

doi:10.1016/j.jnoncrysol.2004.11.015

Cited by 4 publications

(2 citation statements)

References 23 publications

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“…It is an important and unique method in the study of the microstructure and the defect distribution in metals [5][6][7][8][9][10]. Moreover, positrons provide direct and exclusive information on free volumes in polymers [11][12][13][14][15], semi-conductors [16][17][18][19], and other nonmetallic materials [20][21][22][23][24]. Sometimes, PAS offers a valuable opportunity to study rather complex materials (chemical complexes, mixtures), as well [25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

A possible novel method in nuclear forensics: positron annihilation spectroscopy

Tóbi

Homonnay

Süvegh

2023

J Radioanal Nucl Chem

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Positron Annihilation Spectroscopy (PAS) is a non-destructive technique used mostly in material science for studying open spaces/free volumes in materials. In this work, several different nuclear materials originating from the nuclear fuel cycle or round-robin exercises are analyzed by PAS. Our goal was, as for a first test of applicability, to check whether the technique is potentially suitable in a nuclear forensic examination for origin assessment of nuclear materials in order to support investigation. The results, presented below are promising and can certainly be further improved by analyzing larger sets of samples.

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Section: Introductionmentioning

confidence: 99%

A possible novel method in nuclear forensics: positron annihilation spectroscopy

Tóbi

Homonnay

Süvegh

2023

J Radioanal Nucl Chem

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“…In recent years, the synthesis of hybrid inorganic–organic polymers and their potential applications from catalysis to optics have been amply studied with a view to preparing materials with enhanced mechanical, magnetic and thermal properties 1–9. The final architecture can be controlled and a homogeneous dispersion of the inorganic components in the organic matrix can be achieved by means of well‐defined reaction steps from molecular level onwards.…”

Section: Introductionmentioning

confidence: 99%

Structure‐related behavior of hybrid organic–inorganic materials prepared in different synthesis conditions from Zr‐based NBBs and 3‐methacryloxypropyl trimethoxysilane

Maggio

Callone

Girardi

et al. 2012

J of Applied Polymer Sci

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The copolymerization of zirconium oxo‐clusters (Zr12) with 3‐methacryloxypropyl (trimethoxy)silane (MPTMS), using a Si/Zr molar ratio of 4, was investigated. The hybrid samples were prepared both with and without organosilane prehydrolysis. Differential scanning calorimetry (DSC), multinuclear liquid, and solid state NMR analyses and Fourier transform infrared (FTIR) spectroscopy were used to characterize the hybrid materials and study the influence of synthesis conditions on condensation and polymerization. The degree of condensation (DOC) of the silsesquioxane network and the polymerization yield are generally high. However, the organosilane prehydrolysis step leads to the reduction of the extent of phase interaction, thus favoring the phase separation between silica‐zirconia‐based domains. Dynamic mechanical spectroscopy (DMS) analyses were performed on the hybrid polymers obtained by means of the two synthetic pathways. The sample prepared without the organosilane prehydrolysis step presents a higher glass transition temperature (Tg) than the one with silane prehydrolysis. By heating above the Tg, the samples retain shape and size, due to the lack of viscous flow. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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Hybrid organic–inorganic materials using zirconium based NBBs and vinyl trimethoxysilane: Effect of pre-hydrolysis of silane

Maggio

Dirè

Callone

et al. 2010

Polymer

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Positron annihilation lifetime study of organic-inorganic hybrid materials prepared by irradiation

Cited by 4 publications

References 23 publications

A possible novel method in nuclear forensics: positron annihilation spectroscopy

A possible novel method in nuclear forensics: positron annihilation spectroscopy

Structure‐related behavior of hybrid organic–inorganic materials prepared in different synthesis conditions from Zr‐based NBBs and 3‐methacryloxypropyl trimethoxysilane

Hybrid organic–inorganic materials using zirconium based NBBs and vinyl trimethoxysilane: Effect of pre-hydrolysis of silane

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