Why do silver nanoparticles of 10 nanometers in diameter hav

Why do silver nanoparticles of 10 nanometers in diameter have lower melting temperature than the same silver but in the form of a 1/4 inch rod?

Solution

Firstly in case of spherical there is low volume to surface area so it has high heat absorbing capacity so low melting point but in case of cylindrical surface to volume ratio is quite large

Secondly in case of spherical nanoparticle browniam motion is very high because of which high heat transfer coeeficient is achieved and so low melting point in case of nanoparticle