How to Control the Recombinant Prion Protein Adhesion for Successful Storage Through Modification of Surface Properties

Biointerphases

Journal for Biophysical Chemistry

Table 2 Decomposition of C1s high resolution peaks of PNIPAM/PEG(20)sorbitan monolaurate grafted surfaces at variable polymer (C_P), surfactant (W_S) concentrations and He plasma activation times

Component Energy	C1 (%) 285.0 eV	C2 (%) 286.4 eV	C3 (%) 287.7 eV	C4 (%) 288.2 eV	N/O
Possible assignment	C–C/C–H	C–O/C–N	(N)–C=O	COOH(R)
C_P = 0.5 g L⁻¹; ΔW_S (%)
0	70	15	15	/	0.85
0.01	69	19	10	2	0.42
0.05	65	24	7	4	0.27
0.10	61	27	9	3	0.23
W_S = 0.05 %; ΔC_P (g L⁻¹)
0	52	42	3	3	/
0.02	57	35	6	2	0.18
0.5	62	27	8	3	0.23
2.0	66	22	9	3	0.25
Pretreatment time (s)
0^a	97	3	/	/	/
10	71	19	8	2	0.28
60	69	24	5	2	0.31
180	65	24	7	4	0.27

^aSince no adsorption of PNIPAM/PEG(20)sorbitan monolaurate mixture occurs, it corresponds to virgin PP