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Why are rough cylindrical wires preferred to the smooth ones for catalytic applications?

Why are rough cylindrical wires preferred to the smooth ones for catalytic applications? Correct Answer Increased surface area

Smooth cylindrical nanowires are suitable for several applications such as sensing of optical or electrical signals. However, in some cases an increased surface roughness is more desired. In catalysts, a larger roughness has effective increase in available surface thus making the catalyst more efficient.

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