Molecules/nm²? what does it mean

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In summary, the amount added of a product is given by molecules/nm², but it cannot be converted to molar or mass concentration. To calculate the required amount, you need to know the surface area to be covered, the volume of solution, and the desired molar concentration. For spherical nanoparticles with a size of 30nm, the correct approach would be to multiply the surface area by the amount of 0.6 molecule/nm².
  • #1
nadaben
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Hi everyone

in an article they mentioned that the amount added of a product is given by molecules/nm²
how can i obtain a molar or mass concentration from it ?

best regards
 
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  • #2
You can't; it is a number of molecules per unit area, not volume. Presumably to do with coating a surface or similar phenomenon. You can convert it to, say, moles/m2 if you want.
 
  • #3
There is no way to know the amount i can take? cause i should mix it with my solution before deposition..
 
  • #4
Do you understand how concentrations work in general?

You can calculate amount only if you know the surface which you need to cover. Then you have to decide what volume of solution to use and once you know both amount and volume you can calculate required molar concentration.
 
  • #5
if i have spherical nanoparticles sized 30nm and i want to cover them with a product with an amount of 0.6 molecule/nm²
how can i know the corresponding quantity that i should take of this product?
is it by multipliying the surface of nanoparticle (4πr²) by 0.6?
 
  • #6
That's amount per a single nanoparticle, but yes, that's the correct approach.
 
  • #7
Yes exactly ! Thank u so much for your help
 

Related to Molecules/nm²? what does it mean

What is a molecule?

A molecule is the smallest unit of a chemical compound that retains the properties of that compound. It is made up of two or more atoms that are bonded together.

What are nm²?

nm² stands for nanometers squared and is a unit of measurement used for area. It is equal to one billionth of a square meter.

How are molecules measured in nm²?

Molecules are not measured in nm² as they are three-dimensional objects and do not have a defined area. However, the size of a molecule can be measured in nanometers, which is the unit used in nm².

What is the significance of measuring molecules in nm²?

Measuring molecules in nm² allows for a more accurate understanding of their size and structure. This is especially important when studying molecules that are involved in biological processes or nanotechnology.

Why is it important to know the size of molecules in nm²?

Knowing the size of molecules in nm² is crucial in many scientific fields, such as chemistry, biology, and materials science. It can help researchers understand the properties and behavior of molecules and how they interact with other substances.

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