Table 2.

XPS High Resolution Carbon data of ppNIPAM (top) and spNIPAM (bottom) stored at 25°C low humidity (left), 37°C low (middle) and high humidity (right) conditions before submersion in DPBS for 0 (white), 2 (light grey), or 48 (dark grey) hours. All surfaces maintain carbon binding environments indicative of pNIPAM deposition, regardless of storage conditions. N = 9 and the standard deviation was below 5 for each value reported above.

	High Resolution Carbon: Relative Atomic Percent
	25°C Low Humidity			37°C Low Humidity			37°C High Humidity
	CH/CC 285eV	CO/CN 286eV	O=CN 288eV	CH/CC 285eV	CO/CN 286eV	O=CN 288eV	CH/CC 285eV	CO/CN 286eV	O=CN 288eV
Theoretical Composition	66.7	16.7	16.7	66.7	16.7	16.7	66.7	16.7	16.7
ppNIPAM 0hr	62.1	20.8	17.1	69.8	19.8	10.4	52.2	28.4	19.4
ppNIPAM 2hr	54.7	27.0	18.3	62.2	24.6	13.3	53.2	28.6	18.3
ppNIPAM 48hr	62.8	20.4	16.7	64.1	22.1	13.8	66.8	23.8	9.4
spNIPAM 0hr	68.7	17.1	14.2	62.1	20.2	17.7	65.1	20.2	14.7
spNIPAM 2hr	63.6	22.4	14.0	60.0	23.3	16.7	64.3	24.5	11.1
spNIPAM 48hr	72.4	13.2	14.4	60.6	23.4	15.9	62.2	22.3	15.5