I have made nanoparticle-BSA composite coated by chitosan.

I had experiment Zeta-potential to confirm the chitosan coating.

The result is indicate the sample is not coated by chitosan.

I think the reason is nanoparticle-BSA solution pH, the pH of nanoparticle-BSA composite solution is high appoximetely 9~10.

I think the solution is using buffer when dissolving BSA.

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