Question

Why surface property of material is different from bulk property?

Answer 1

While bulk materials have constant physical properties regardless of size, the size of a nanoparticle dictates its physical and chemical properties. Thus, the properties of a material change as its size approaches nanoscale proportions and as the percentage of atoms at the surface of a material becomes significant.

Answer 2

Bulk and Surface Properties of Solids Surface. Close packed model and predict properties of materials constructed of building do WORK(or supply heat) to separate the pairs.The bulk properties of a material depend not only on what types of atoms and molecules it contains. The crossover point is a function of surface stabilization by external medium.