Measurement of Sub-2 nm clusters of pristine and composite metal oxides during nanomaterial synthesis in flame aerosol reactors

Jiaxi Fang, Yang Wang, Michel Attoui, Tandeep S. Chadha, Jessica R. Ray, Wei Ning Wang, Young Shin Jun, Pratim Biswas

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

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 TiO 2/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.

Original languageEnglish (US)
Pages (from-to)7523-7529
Number of pages7
JournalAnalytical Chemistry
Volume86
Issue number15
DOIs
StatePublished - Aug 5 2014
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry

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