I did the Zeta potential analyzing on my iron nano sample for tons of time. All the result showed positive value and there was no any negative value.
How should I explain this kind of result since the other of my laboratory experiment received negative result on silver, gold and Ti etc.
Is it possible that I did something wrong during the process?
Thank you for your helping and advice.
Fen+ where n = 2 or 3 on the surface. All surfaces are oxidized in air and you'll have iron in the Fe2+ and Fe3+ on the surface. You can confirm by ESCA/XPS.
@Mr. Rawle
Thank you so much. But it is still confusing that why did the other metal material like silver, gold or even Ti received negative result?
Thank you for helping.
@Mr. Rawle
Thank you so much. You have been giving me great advice and it does help a lot on my research.
you should go through your synthesis protocol. Based on the molecules used during synthesis to stabilise the nanoparticles, the surface charge or zeta potential can be +ve or -ve.
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