Q.

What’s the procedure in Top-down fabrication method?

A. nano-particles -> powder -> bulk
B. powder -> bulk – > nano-particles
C. bulk -> powder – > nano-particles
D. nano-particle – > bulk -> powder
Answer» C. bulk -> powder – > nano-particles
Explanation: top-down approach is the one in which a material of regular size is converted into a nano-particle. in the bottom-up approach, the atoms are joined to form nano-particles.
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