Surface to Volume ratio - Aspect ratio of nanomaterials

Aspect ratio* Vs Surface to volume ratio Vs Surface-area-to-volume ratio
All these three names are used for the same terminology, and we encounter a lot when dealing with nanomaterials.
Surface to volume ratio has a significant effect on the properties of materials.
The surface to volume ratio of the sample made from nanoparticles has a relatively larger value as compared to the same volume of material made up of bigger particles.
Let's suppose that our synthesized nanomaterials are in the form of a sphere having radius (r). The volume of the sphere is 4/3pi*r3, and the surface area of the sphere is 4 pi *r2. so, surface to volume ratio (S/V) = 3/r
It shows that the surface to volume ratio increases with decreasing the size and vice versa.
Therefore, the smaller the particle size, the greater the proportion of the particles are found at the surface of the material.
Smaller nanoparticles or other nanomaterials generally have a larger surface area-to-volume ratio, which can affect their physical and chemical properties, such as solubility, reactivity, and stability.
How to find the specific surface area using BET analysis.
• BET Analysis - Specifi...
Specific surface area is a very important and key property of a nanomaterial. An estimation has shown that at least 1300 commercial products use nanomaterials. There are many extraordinary characteristics and applications of nanomaterials, one of them is its high specific surface area.
Specific surface area is basically the total surface area of a material per unit mass. It is usually measured in the unit of (m2/g)
It can also be defined as surface area per volume. It is usually measured with units of m2/m3 or m−1)
Application
It has a particular importance for following
Cement and concrete
Adsorption
Catalysis
Reactions on surfaces
Pore size
Pore volume
How to measure the specific surface area
Brunauer-Emmett-Teller (N2-BET) analysis is used to measure the specific surface area, pore size, and pore volume.
Limitation of BET
It only works on solids or dry powder and is not applicable to liquid or colloidal solutions.

[@letsseeashcrafts752]

Thank you for this information

[@qamarwali]

Welcome

[@namrahadi2774]

Keep it up sir

[@qamarwali]

Thanks 😊

[@rabeeariaz732]

good explanation👍

[@qamarwali]

I am happy you like it. Thanks 😊