Table 1. ζ Potential of SP, SP/SiO2-NH2, and SP/SiO2-PC-biotin.
| sample | SP | SP/SiO2-NH2 | SP/SiO2-PC-biotin |
|---|---|---|---|
| ζ potential (mV) | –12.2 | –44.1 | –27.2 |
| standard deviation (mV) | 6.86 | 9.98 | 7.83 |
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