Measurement of Sub-2 nm Clusters of Pristine and Composite Metal Oxides during Nanomaterial Synthesis in Flame Aerosol Reactors
Measuring stable clusters to understand particle inception will aid the synthesis of well-controlled nanoparticles via gas-phase aerosol routes. Using a Half Mini differential mobility analyzer, the presence of monomers, dimers, trimers, and tetramers was detected for the first time in a flame aerosol reactor during the synthesis of pristine TiO2 and TiO2/SiO2 nanocomposites. Atomic force microscopy confirmed the presence and the size of sub-2 nm clusters. The detection of these clusters elucidated the initial stages of particle formation during combustion synthesis and supported previous hypotheses that collisional growth from stable monomers of metal oxides is the first step of particle growth.
J. Fang et al., "Measurement of Sub-2 nm Clusters of Pristine and Composite Metal Oxides during Nanomaterial Synthesis in Flame Aerosol Reactors," Analytical Chemistry, vol. 86, no. 15, pp. 7523-7529, American Chemical Society (ACS), Aug 2014.
The definitive version is available at https://doi.org/10.1021/ac5012816
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Aerosols; Atomic force microscopy; Combustion synthesis; Monomers; Titanium dioxide; Composite metal oxides; Differential mobility analyzers; Flame aerosol reactor; Nanomaterial; Particle formations; Particle growth; Particle inception; Stable clusters; Dimers
International Standard Serial Number (ISSN)
Article - Journal
© 2014 American Chemical Society (ACS), All rights reserved.
01 Aug 2014