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- W2034191936 abstract "Experimental measurements of bipolar diffusion charging efficiency over the range of 15–400 nm are compared for oil droplets, flame generated soot aggregates, and diesel engine exhaust particulate matter to explore possible effects of particle morphology. Charging efficiency is recorded using a tandem differential mobility analyzer (DMA) approach; the first DMA selects a monodisperse aerosol and the second compares the flux of these particles through a neutralizer versus an identical blank housing. Electrostatic precipitation of mobility selected soot particles onto TEM grids provides comparative data on changes in soot particle morphology with mobility diameter. The measurements yield soot charging efficiencies that slightly, but systematically, differ from those of equal mobility diameter oil droplets. Single positive charging of soot climbs to ∼ 10% higher than oil droplets at 50 nm and then decreases to 15% lower by 400 nm as the soot develops a progressively more fractal-like structure. Negative charging exhibits the same pattern, except the variations are +15% and –10%, respectively. These trends, as well as those for double and triple charging, fall intermediate between Fuchs predictions and the model of CitationWen et al. (1984a) for charging of fibrous particles." @default.
- W2034191936 created "2016-06-24" @default.
- W2034191936 creator A5046531923 @default.
- W2034191936 date "2008-03-03" @default.
- W2034191936 modified "2023-10-15" @default.
- W2034191936 title "Bipolar Diffusion Charging of Soot Aggregates" @default.
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- W2034191936 doi "https://doi.org/10.1080/02786820801958775" @default.
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