NDLI: In Situ Charge Characterization of TiO$_{2}$ and Cu–TiO$_{2}$ Nanoparticles in a Flame Aerosol Reactor

Content Provider	Springer Nature Link
Author	Sahu, Maranjan Park, Jinho Biswas, Pratim
Copyright Year	2012
Abstract	Charge distribution characteristics were investigated for nanoparticles synthesized in a diffusion flame aerosol reactor. The nanoparticles considered were pristine TiO$_{2}$ and Cu–TiO$_{2}$, with Cu dopant concentrations ranging from 1 to 5 wt% with particle size from 25 to 60 nm. In situ measurements were conducted by integrating a tandem differential mobility analyzer (TDMA) experimental setup with the flame aerosol reactor. A charging model was used to identify the important parameters that govern the two charging mechanisms (diffusion and thermo-ionization) in the flame and their relative importance at different operating parameters. The results indicate that TiO$_{2}$ and Cu–TiO$_{2}$ nanoparticles carry single as well as double unit charges. The charged fraction depends on particle size as well as on dopant concentration. The charged fraction increased with increasing particle size and decreased with copper dopant concentration. Measured charged fractions were similar for both the polarities at different mobility diameters. Based on the flame operating parameters, the calculations indicate that diffusion charging is dominant in the flame, which is consistent with the experimental results.
Starting Page	1
Ending Page	11
Page Count	11
File Format	PDF
ISSN	13880764
Journal	Journal of Nanoparticle Research
Volume Number	14
Issue Number	2
e-ISSN	1572896X
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-01-28
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nanoparticles Charge distribution Flame synthesis TiO$_{2}$ Dopant Cu–TiO$_{2}$ Instrumentation Optics, Optoelectronics, Plasmonics and Optical Devices Characterization and Evaluation of Materials Physical Chemistry Inorganic Chemistry Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Bioengineering Modeling and Simulation

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