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sci.nanoparticle-size-zeta Calculator
Calculates nanoparticle hydrodynamic diameter from DLS autocorrelation data and zeta potential from electrophoretic mobility. Zeta potential above ±30 mV indicates colloidal stability — below this, Van der Waals attraction exceeds electrostatic repulsion and particles aggregate.
Inputs
Hydrodynamic Diameter Nm
Distance across a circle through its centre. Always confirm units match the rest of the calculation.
Zeta Potential Mv
Reference formula or conversion factor shown for context.
Temperature C
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
Viscosity Mpas
Fluid resistance to flow. Water at 20°C: ~1 cP. Honey: 2,000–10,000 cP. Higher viscosity increases pumping power requirements.
Results
diffusion coefficient (µm²/s)
Sample size or count used in the calculation.
hydrodynamic diameter (nm)
The computed diameter -- twice the radius.
zeta potential (mV)
Sample size or count used in the calculation.
stability
Measure of how robust the system, structure, or process is to perturbations. Low stability means small changes can cause large deviations.
Stokes-Einstein: D = kBT/(3πηd)
Sample size or count used in the calculation.
PDI <0.2
Reference formula or conversion factor shown for context.