Journal
JOURNAL OF NANOPARTICLE RESEARCH
Volume 17, Issue 11, Pages -Publisher
SPRINGER
DOI: 10.1007/s11051-015-3263-3
Keywords
Flame spray pyrolysis; Indium(III)-oxide nanoparticles; Two-line atomic fluorescence; Temperature measurement
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Funding
- Deutsche Forschungsgemeinschaft (DFG) through the Cluster of Excellence Engineering of Advanced Materials (EAM)
- Erlangen Graduate School in Advanced Optical Technologies (SAOT) at the University of Erlangen-Nurnberg
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The applicability of two-line atomic fluorescence (TLAF) for temperature imaging in an indium-based flame spray pyrolysis (FSP) process is demonstrated using a single tunable optical parametric oscillator (OPO) to generate the required excitation wavelengths consecutively. Single-shot images of the detected fluorescence signals demonstrate that the signal levels in the flame are suitable for evaluation of temperature and verify the capability and potential of the measurement technique directly during particle formation without additional indium seeding. Qualitative averaged two-dimensional temperature distributions in the FSP flame are presented, showing the influence of varying sheath gas flow rates on the resulting temperature distribution. With the addition of a second OPO and detection system, the two fluorescence signals acquired consecutively in this work could be obtained simultaneously and enable spatio-temporally resolved single-shot temperature measurements in flame synthesis processes of indium-containing nanoparticles.
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