In many cases of nanocrystal synthesis, when the diffusion rates of the two reactants are different, interesting
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In many cases of nanocrystal synthesis, when the diffusion rates of the two reactants are different, interesting morphologies such as hollow structures will be formed.
(a) We have Co nanospheres with 10 nm in diameter to be reacted with S to become Co9S8 in a solution synthesis. Imaging that the Co atoms diffuse much faster than the S atoms in Co9S8, what is the final morphology of Co9S8? It is a solid sphere or hollow sphere?
(b) If the final product Co9S8 is a solid sphere, then what is the diameter of the sphere? If it is a hollow sphere, then what is the thickness of the shell?
The density of Co is 8.90 g/cm3, and the density of Co9S8 is 5.45 g/cm3
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