Table 1.

Petri dish surface roughness changes (mean out of 10 measurements) with standard deviation.

Surface Type	Mean Value Ra 1 [µm]	Mean Value Rz 2 [µm]
Petri dish surface	0.590 ± 0.04	2.88 ± 0.65
Petri dish surface after plasma cleansing	0.796 ± 0.14	3.25 ± 0.76
Petri dish surface after plasma cleansing and UV sterilization	0.690 ± 0.18	2.74 ± 0.22
Petri dish surface after plasma cleansing and GO deposition	0.848 ± 0.12	2.89 ± 0.28
Petri dish surface after plasma cleansing, GO deposition and vacuum drying	0.984 ± 0.32	4.14 ± 0.36
Petri dish surface after plasma cleansing, vacuum drying and UV sterilization	0.896 ± 0.29	3.85 ± 0.34

¹ Ra—arithmetic average.² Rz—maximum peak to valley height of the profile.