Synthesis of silica aerosol gels via controlled detonation

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Show simple item record Dhaubhadel, R. Rieker, T. P. Chakrabarti, A. Sorensen, Christopher M. 2012-07-13T16:07:34Z 2012-07-13T16:07:34Z 2012-07-13
dc.description.abstract Silica (SiO[subscript]2) aerosol gels were formed via Brownian aggregation of silica nanoparticles in a closed reaction chamber. A sudden and quick detonation reaction of pyrophoric silane (SiH[subscript]4) with either oxygen or nitrous oxide created silica nanoparticles with diameters ranging from ~ 22 to 90 nm in the presence of an inert background gas with a volume fraction of ca. 10[superscript]-4, conditions necessary for gelation. The background gas was necessary for quick thermal quenching of freshly formed silica molecules and molten nanoparticles and some control of the particle size could be achieved by variation of the gas. The silica aerosol gels were found to have very low densities in the range 4 to 15 mg/cm[superscript]3 and high specific surface areas of 300 to 500 m[superscript]2/g. Wide angle X-ray diffraction showed that the nanoparticles were amorphous silica. Neutron scattering showed that they were arranged in networks with a fractal dimension of 1.75 between 10 to 1000nm length scales. en_US
dc.relation.uri en_US
dc.rights This is an electronic version of an article published in Aerosol Science and Technology, 46(5), 596-600. Aerosol Science and Technology is available online at: . en_US
dc.subject Silica aerosol gels en_US
dc.subject Nanoparticles en_US
dc.subject Fractal aggregates en_US
dc.subject Synthesis en_US
dc.title Synthesis of silica aerosol gels via controlled detonation en_US
dc.type Article (author version) en_US 2012 en_US
dc.citation.doi doi:10.1080/02786826.2011.651175 en_US
dc.citation.epage 600 en_US
dc.citation.issue 5 en_US
dc.citation.jtitle Aerosol Science and Technology en_US
dc.citation.spage 596 en_US
dc.citation.volume 46 en_US
dc.contributor.authoreid amitc en_US
dc.contributor.authoreid sor en_US

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