Difference between zeta potential and membrane potential
Answers
Answer:
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Explanation:
Assume that you have dispersed your nanoparticles in a medium containing some ions (usually distilled and double distilled water has ions). If you take a single nanoparticle into account, it's surface has a charge which is nothing but "surface zeta potential (surface charge)". Assume that the nanoparticle surface is negatively charged. Hence you get a "surface zeta potential" with some negative value. Now as this nanoparticle is present in a solution containing ions, its's surface (negatively charged nanoparticle surface) attracts positive charged ions and these positively charged ions further attracts negatively charged ions and finally it forms a strongly bound inner "stern layer" and weakly bound outer layer (together it's called electric double layer). There will be a potential that exists at the boundary of this surface (it may also be assumed a difference between the potential of the outer layer and potential of the medium). This potential is called "Zeta potential". So, if we are dispersing the nanoparticles in deionized water, the surface zeta potential and the zeta potential should be same.
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