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SEM (obtained by the second method), size and zeta potential of STIN (first from top) (size = 78.98 d.nm, ZP = −28.0 mV), S2TIN (second from top) (size = 94.28 d.nm, ZP = −38.2 mV), TSIN (third from top) (size = 88.65 d.nm, ZP = −30.5 mV), and T2SIN (bottom) (size = 91.11 d.nm, ZP = −34.1 mV) (n = 1).
