I boiled 100 ml of 0.01% of HAuCl4 to 100C
I added 2ml of 1% trisodium citrate.after 30 mins I left the solution to cool down to room tem
The particles size are 10,11,12,13 nm
but the charge was +4
why do I got a positive zeta potential instead of negative charge?
Yuri Mirgorod
Soha Alkhaldi
The zeta potential appears on the slip plane when the diffuse layer is separated. Sodium ions are in the diffuse layer of your nanoparticles. Therefore, the zeta potential is positive.
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Yuri Mirgorod
Soha Alkhaldi
Therefore, in the diffuse layer of your micelle there are negative ions.
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Alan F Rawle
Soha Alkhaldi Dilution could destabilize the system and or pH change could destabilize the system and produce precipitation, agglomeration etc...
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