Table 1.

Size and Zeta Potential of the Nanoparticles in DI Water, Media + 10% FBS, and PBS^a

	hydrodynamic diameter (nm) measured by DLS			zeta potential (mV) at 25 °C
nanoparticle	deionized (DI) water	media + 10% FBS	diameter (nm) measured by TEM	DI water pH 7.2	media + 10% FBS	PBS pH 7.2
60 Mesoporous D	79 ± 2	216 ± 15	58 ± 7	−32 ± 2	−10 ± 1	−8 ± 2
110 Mesoporous D	165 ± 2	178 ± 57	108 ± 11	−32 ± 1	−8 ± 1	−7
110 Mesoporous T	162 ± 8	218 ± 52	110 ± 9	−27 ± 1	−11	−4
120 Nonporous D	148 ± 4	219 ± 28	124 ± 9	−33 ± 2	−7.5	−8
330 Nonporous D	367 ± 2	433 ± 12	332 ± 6	−29 ± 2	−9 ± 1	−11 ± 1

^aData are mean ± SD (n = 3).