I am working on alkali metal NPs and dissolve in water for DLS and zeta. I am a bit confused, when I added in water it instantly dissolves at natural pH. If Nanomaterial dissolves in water, it becomes ions. Could you please guide me in this regard?
Noman Shakoor
Perhaps you made sodium nanoparticles using your own method and store them in kerosene. Nanoparticles in kerosene are a dispersed system. Nanoparticles do not dissolve in kerosene. If you put them in water, they react with water. Hydrogen is released, and sodium in solution is already in the form of ions. Therefore, this is already a solution of sodium alkali.
Dear all, if dissolved they are no more NPs. However, these type of NPs are prepared and characterized in a matrix (intercalated or in pores). Please check the following documents. My Regards
https://link.springer.com/article/10.1134/S1063784217020037
https://www.forskningsdatabasen.dk/en/catalog/2572349932
10.1140/epjd/e2008-00164-5
https://doi.org/10.1021/ja01026a006
https://doi.org/10.1063/1.1514076
according to me, we should not call it nanoparticles. a particle which is stable in most conditions only we can call as nanoparticle
Yuri Mirgorod Thanks for your detailed response. We are using Li2O NPs and dissolve in water. According to the vendor, they are insoluble in water. We can see very few suspended particles in solution. Do you think if they don't make aggregates and we are unable to see them clearly? Which parameter we should use for confirmation?
Noman Shakoor
It amazes me that you are buying lithium oxide nanoparticles. Check out Wikipedia. It says that lithium oxide reacts violently with water. Perhaps it is somehow protected from water. Then you need to ask the seller about this. To confirm, determine the pH of the aqueous solution. The pH should be much higher than 7.
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