Table 2.
Comparison of number of elementary charges per particle (Qp) in the aerodynamic diameter range of 0.095–0.96 μm with an initial solution concentration of 0.05% AS-0.01% NaCl. The first three columns of Qp are based on analytical estimates for maximum diffusion charging, field charging, and the Rayleigh limit all calculated from Ref. [34]. The final column provides Qp based on ELPI measurements made in this study. In all cases the field strength was 5 kV/cm.
| Particle Diameter (μm) | Diffusion Charging (e) Eq. 15.24 Ref [34] |
Field Charging (e) Eq. 15.25 Ref [34] |
Rayleigh Limit (e) Eq. 15.29 Ref [34] |
Induced Charge/particle (e) 0.05%AS 0.01% NaCl, 5 kV |
|---|---|---|---|---|
| 0.095 | 2.6 | 2.0 | 1306.5 | 8.9 (1.3) |
| 0.158 | 4.9 | 5.5 | 2802.2 | 32.4 (6.5) |
| 0.266 | 9.5 | 15.7 | 6121.1 | 138.2 (34.2) |
| 0.388 | 15.1 | 33.3 | 10783.4 | 411.1 (129.3) |
| 0.621 | 26.7 | 85.4 | 21834.7 | 1820.1 (578.9) |
| 0.96 | 44.9 | 204.1 | 41967.9 | 14045.5 (4120.8) |