Particle size and zeta potential of Nanomaghemite@APTES@ conjugate were evaluated using a particle size analyzer (Zetasizer Nano ZS90, Malvern instruments, Malvern, UK) as well as the size distribution and zeta potential of the entire complex. The conjugates were prepared in PBS (pH 7.4) and incubated at 25 °C for 15 min before measurement.
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