. Author manuscript; available in PMC: 2023 Jun 1.

Published in final edited form as: J Biomed Mater Res A. 2022 Feb 7;110(6):1238–1250. doi: 10.1002/jbm.a.37369

Table 2.

Characterization of PUU submicron textured pillar patterns

Pattern #	Pattern (D/S_r/H) (nm) Pillar shape	Pillar height (nm)	Distance in row (S_r) (nm )	Distance in diagonal (S_d,) (nm)	Pillar top surface area (μm²)	Surface area fraction (%)

1	500/300/500 Square	467.7 ±10.2	319.5 ±21.7	576.5 ±17.2	0.243 ±0.018	36.6
2	700/700/300 Square	307.6 ±13.2	622.5 ±21.7	1012.7 ±25.9	0.478 ±0.045	29.1
3	500/500/600 Square	565.8 ±21.1	481.6 ±23.5	799.6 ±32.5	0.291 ±0.029	28.9
4	400/400/600 Round	585.6 ±18.5	374.7 ±20.5	677.2 ±20.4	0.155 ±0.010	24.8
5	500/500/600 Round	601.8 ±9.8	453.8 ±22.2	850.6 ±37.2	0.279 ±0.030	26.7
	Smooth	--	--	--	--	100.0

Note: Surface area fraction is the ratio of total pillar top surface area and total 2-D projected surface area including both the pillar top surface and bottom surface between pillars, but not the pillar sidewalls.