Home          Volume & Surface Area of Nano Particles and Number of Molecule

This program calculates the volume, weight and moles of a polymer in the core and shell of a particle of a given size of the core and shell. The calculation uses as input the particle radius, shell diameter, density of core and shell and also the molecular weight of the core and shell polymer. Of course in case of inorganic compounds the respective properties of the inorganic materials can be used. 

If the shell is solvated the density of the shell has to be reduced. Assuming that the shell polymer is swollen in solvent for a polymer with a density of 1.2g/cm3 a value of >1.2g/cm3 would give a better representation of the actual conditions.

Enter data       Equation
Radius Particle, Rp    
Density particle, g/ml Dp    
Particle,  molecular weight of polymer Mwp    
Thickness surface, Rs    
Density surface, g/ml Ds    
Surface, molecular weight of polymer Mws    
Volume particle, cm3 Vp   4*Rp3*π/3
Weight particle, g Wp   Vp*Dp
Number particle per gram Ng   1/Wp
Number of molecules per particle Molp   Wp/(Mwp/Avo)
Volume surface, cm2 Vs   4*(Rp+Rs)3*π/3-Vp
Weight surface, g Ws   Vs*Ds
Number molecules per particle surface Mols   Ws/(Mws/Avo)
Volume ratio Surface/Particle Vsp   Vs/Vp
Weight ratio Surface/Particle Wsp   Ws/Wp
Volume surface % Vs_per   Vs/(Vs+Vp)*100
Weight surface % Ws_per   Ws/(Ws+Wp)*100
Avogadro constant  6.022141 1023mol-1        

Automatic recalculation 

Last edited on:

October 21, 2010

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