For a substance to be considered a nano-material what criterion must be met?
A) It must have non-separable energy levels.
B) It must be in finely divided powder form.
C) It must contain a metal suspension.
D) It must have a particle size in the range 1 - 100 nm.
E) It must be both lightweight and remarkably strong as a macroscopic material.
Correct Answer:
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