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RB amount, nanoparticle size and their Zeta potential by DLS in water of the different RB-PEG-MSNs.
| System | Characteristic | PEG Length (Da) |
DLS Size (nm) |
ZPOT (mV) |
[RB] (μmol/g) |
|---|---|---|---|---|---|
| RB-PEG750-NP-a | RB-OH-MSN PEG-NH2-MSN |
750 | 130 | −4.3 | 20 |
| RB-PEG2000-NP-a | RB-OH-MSN PEG-NH2-MSN |
2000 | 99 | −25.0 | 20 |
| RB-PEG5000-NP-a | RB-OH-MSN PEG-NH2-MSN |
5000 | 114 | −25.0 | 20 |
| RB-PEG-NP-b | RB-NH2-MSN PEG-OH-MSN |
2000 | 95 | −29.0 | 10 |
| RB-PEG-NP-c | RB-OH-MSN PEG-OH-MSN |
2000 | 88 | −31.0 | 20 |
