Table II.

Composition of the pS-co-NIPAM series and a comparative size analysis using SEM and AFM.

Microgel Sample	Composition (mol%) (Styrene:NIPAM: BIS)	Diameter (nm) (Dried, SEM)	Height (nm) (Dried, AFM)	Width (nm) (Dried, AFM)	Aspect ratio (Width/Height, AFM)
pS-co-NIPAM-1	50:50:0	170 ± 5	200 ± 4	247 ± 12	1.23 ± 0.06
pS-co-NIPAM-2	49.5:49.5:1	175 ± 4	213 ± 4	247 ± 6	1.16 ± 0.04
pS-co-NIPAM-3	48.5:48.5:3	164 ± 4	187 ± 2	238 ± 8	1.27 ± 0.04
pS-co-NIPAM-4	24.75:74.25:1	171 ± 8	181 ± 5	254 ± 10	1.40 ± 0.07
pS-co-NIPAM-5	24:73:3	190 ± 6	170 ± 7	252 ± 10	1.48 ± 0.08