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Table 1 Summary of the physicochemical properties of amorphous silica particles (SPs).

From: Amorphous silica nanoparticles size-dependently aggravate atopic dermatitis-like skin lesions following an intradermal injection

  Primary particle
size (nm) a
Diameter in
PBS (nm)
Mean zeta
potential (mV)
pH
mSP1000 1000 1136 ± 32.1 -33.2 ± 1.4 7.6
nSP300 300 264 ± 7.2 -25.8 ± 0.7 7.4
nSP100 100 106 ± 0.6 -24.3 ± 0.5 7.4
nSP70 70 76 ± 1.7 -19.5 ± 1.0 7.4
nSP30 30 39 ± 4.2 -14.0 ± 1.3 7.4
  1. Mean particle size and zeta potential in solution of silica particles are expressed as mean ± S.D. (n = 3). a Information from technical datasheet of products.