The relationship between cellular adhesion and surface roughness for polyurethane modified by microwave plasma radiation

Figures & data

Figure 1 Experimental setup of the microwave plasma instrument.

Figure 2 Spectra of attenuated total reflection Fourier transform infrared of normal polyurethane (A), polyurethane modified by oxygen plasma (B), and polyurethane modified by argon plasma (C).

Figure 3 Topography of normal polyurethane.

Figure 4 Topography of polyurethane modified by argon plasma for 30 seconds (A) and 60 seconds (B).

Figure 5 Topography of polyurethane modified by oxygen plasma for 30 seconds (A) and 60 seconds (B).

Table 1 Contact angles of normal and irradiated samples (average)

Sample	θ (degrees) (treated by argon plasma)	θ (degrees) (treated by oxygen plasma)
Normal	78.1	78.1
30 seconds	44.6	17.2
60 seconds	42.6	13.7

Table 2 MTT analysis of the samples

Sample	λ (nm)	Cell viability (treated by argon plasma) (%)	λ (nm)	Cell viability (treated by argon plasma) (%)
Control	606	100	606	100
Normal	335	55	335	55
30 seconds	352	58	427	70
60 seconds	457	75	910	150

Figure 6 Unrestricted somatic stem cell culture on the (A) control (TCPS) surface, (B) normal polyurethane (PU), (C) PU modified by argon plasma (30 seconds), (D) PU modified by argon plasma (60 seconds), (E) PU modified by oxygen plasma (30 seconds), and (F) PU modified by oxygen plasma (60 seconds).