Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 83, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4766956
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Funding
- Deutsche Forschungsgemeinschaft (DFG), through the research training group [GRK 1140]
- Deutsche Forschungsgemeinschaft (DFG), through the collaborative research center [SFB 445]
- Deutsche Forschungsgemeinschaft (DFG) [INST 20876/35-1 FUGG]
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One key but complex parameter in the chemical vapor synthesis (CVS) of nanoparticles is the time temperature profile of the gas phase, which determines particle characteristics such as size (distribution), morphology, microstructure, crystal, and local structure. Relevant for the CVS process and for the corresponding particle characteristics is, however, not the T(t)-profile generated by an external energy source such as a hot wall or microwave reactor but the temperature of the gas carrying reactants and products (particles). Due to a complex feedback of the thermodynamic and chemical processes in the reaction volume with the external energy source, it is very difficult to predict the real gas phase temperature field from the externally applied T(t)-profile. Therefore, a measurement technique capable to determine the temperature distribution of the gas phase under process conditions is needed. In this contribution, we demonstrate with three proof of principle experiments the use of laser induced fluorescence thermometry to investigate the CVS process under realistic conditions. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4766956]
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