(a)
(b)
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Figure 1: (a) SEM image of the initial E. coli cells (image size: , initial number: ). (b) SEM image of the exposed E. coli cells (O- flux intensity: 192 nA/cm2, exposure time: 10 min, and reaction temperature: 30°C). (c) TEM image of the initial E. coli cells (image size: , ). (d) TEM image of the exposed E. coli cells (O- flux intensity: 135 nA/cm2, exposure time: 10 min, and reaction temperature: 30°C).