How and when the pH of a green/photosynthesized nanoparticle be adjusted to 7?

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Abdelhak Maghchiche

The pH of green/photosynthesized nanoparticles can be adjusted to 7 by adding NaOH during synthesis to control size, shape, and stability.

Yuri Mirgorod

Dr Md. Jashim Uddin

pH is the negative logarithm of hydrogen ion activity. The pH scale exists only for aqueous solutions. Your phrase "pH of a green/photosynthesized nanoparticle" is not good. You should have written the pH of an aqueous dispersed system of green/photosynthesized nanoparticle. To achieve pH 7 in a dispersed system, you can rinse the nanoparticles on a filter with distilled water, and then disperse the nanoparticles again in distilled water.