Table 2.

Band assignments in DSP linker (blue) and in antibody (red) with their corresponding peak position and peak heights (*relative values).

Assignment	Description	Expected Peak Position (cm−1)	Parameter	DSP functionalized surface	Antibody IL-6 in RTIL
					T0	T24	T48
νs(C=O)	Symmetric carbonyl stretch of NHS	1780	Peak position	1777	1779	1779	1779
			Peak height*	0.012	0.002	0.002	0.002
νa(C=O)	Asymmetric carbonyl stretch of NHS	1750–1675	Peak position	1762/1744	1744	1744	1744
			Peak height*	0.013/0.055	0.007	0.041	0.033
νs(C=O)	Free carboxylic acid	1742	Peak position	NA	1744	1744	1744
			Peak height*	NA	0.007	0.041	0.033
ν(C=O)	Amide I	1665	Peak position	NA	1667	1664	1666
			Peak height*	NA	0.083	0.411	0.346