Nanomaterial's Reactivity

Properties in Nanoscale
Category General
Difficulty Level Normal
Audience Level General
Description Have a good knowledge of material structures leads to recognizing material behavior based on its structure. In this course, material structures and properties are elaborated in bulk and nanoscale.
Overview
It is clear that, every atomic structure has its own specific bulk properties. Therefore, being familiar with atomic arrangements, different atomic bonds and different kinds of cubic structures provide a general understanding for recognizing materials and components’ properties. On the other hand, in nanoscales, atomic structures are changed which generates novel properties.
Hence, being familiar with mentioned different parameters in atomic structure makes what happens in nanoscale understandable.

Booklet
Description
 It starts with an introduction. It explains that most of the atoms in a nanoparticle are surface atoms with lower coordination numbers in comparison with internal atoms of nanoparticles. It is discussed that atom reactivity increases when coordination number of the atom decreases. Therefore, reactivity of nano structured materials increases by decreasing particle size as the chemical reactions take place where the material is in contact with environment, and this is material surface. Reactions start from material surface and penetrate through certain conditions.
Mental Challenge
 Why reactivity increases in nanoscale?
Quizzes and Activities

Activity: Draw 5 circles with different sizes. Then order them based on their reactivity, assuming that there is the same volume of each of them.
Further Reading Sources

Theoretical Framework for Nanoparticle Reactivity as a Function of Aggregation State