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Surface area to volume ratio in nanoparticles have a significant effect on the nanoparticles properties. Firstly, nanoparticles have a relative larger surface area when compared to the same volume of the material. For example, let us consider a sphere of radius r:
The surface area of the sphere will be 4πr2
The volume of the sphere = 4/3(πr3)
Therefore the surface area to the volume ratio will be 4πr2/{4/3(πr3)} = 3/r
It means that the surface area to volume ration increases with the decrease in radius of the sphere and vice versa.
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What is difference between macro and nanoparticles?
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