Using the example of doping Ti02 with cobalt atoms, what is the best mechanism t

Question

Using the example of doping Ti02 with cobalt atoms, what is the best mechanism that describe diffusion of Co within the metal oxide? a. Cobalt atom displace oxygen atoms in order to form bonds with Ti atoms. b. Cobalt atoms on the surface migrate to vacancies where Ti atoms where supposed to be. c. Cobalt atoms on the surface migrate to the interstices of metal oxide structure, and then displace a Ti atom. d. Cobalt atoms are injected to the interstices of metal oxide structure and allow them to react with the oxygen.

Explanation / Answer

Answer is (d).

Cobalt atoms are injected to the interstices of metal oxide structure and allow them to react with the oxygen

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