Table 4.

Mass and thickness of multilayer films before and after chemical cross-linking, and mass of human collagen I and IV adsorbed to PAH-PSS and cross-linked PLL-ALG and PLL-PGA films, as measured via OWLS. ST = bare silica-titania OWLS sensor chip.

	Before cross-linking		After cross-linking		hCI	hCIV
	Thickness (nm)	Mass (ng/cm2)	Thickness (nm)	Mass (ng/cm2)	Mass (ng/cm2)	Mass (ng/cm2)
ST					160 ± 10	260 ± 10
(PLL-ALG)5	38 ± 3	1110 ± 20	27 ± 1	1280 ± 40	98 ± 3	19 ± 1
(PLL-ALG)4-PLL	27 ± 2	920 ± 50	21 ± 1	1080 ± 70	27 ± 1	---
(PLL-PGA)5	32 ± 3	920 ± 20	18 ± 1	1040 ± 30	70 ± 2	140 ± 4
(PLL-PGA)4-PLL	25 ± 2	770 ± 30	14 ± 1	940 ± 20	55 ± 2	78 ± 2
(PAH-PSS)5	16 ± 1	1290 ± 40			230 ± 10	390 ± 10
(PAH-PSS)4-PAH	14 ± 1	1120 ± 30			160 ± 10	510 ± 20