Figure 5 | Scientific Reports

Figure 5

From: Applying negative ions and an electric field to countermeasure droplets/aerosol transmission without hindering communication

Figure 5

Negative ion concentration distribution around the device. The height of the devices in (a) and (d) is 8 cm, 16 cm in (b) and (e), and 30 cm in (c) and (f). (a), (b), and (c) show the measurement results without the electric field. (d), (e), and (f) show the measurement results with the electric field. Areas marked with * indicate that the negative ion concentration saturated the ion counter equipment’s measurement limitation.

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