Dear Md. Aminul Islam,
The data indicates that you have a mono disperse MnO2 suspension where the average particle diameter is ~800nm. Also the PDI is low (0.089) which is a good thing since it indicates that ALMOST ALL your particles have a diameter very close to ~800nm and the suspension is uniform in terms of particle size.
Dear Md. Aminul Islam,
I agree with Snehal Atwe's initial assessment of your results. A few extra thoughts if you would like to probe your sample by DLS further:
(1) Realize that DLS is difficult to practice at/above 1 micron in diameter, so you may be missing some larger agglomerates in your system.
(2) If your DLS instrument is working at a high backscattering angle it will also be much less sensitive to larger agglomerates that might possibly be in your system.
(3) For characterization purposes you might trying sizing your sample of MnO2 by DLS in a 20 millimolar sodium hexametaphosphate solution to see if there is any colloidal flocculation occuring in your no salt/no pH control DI water diluent. Likewise you could try a 0.05 wt% solution of a low molecular weight (
Dear Md. Aminul Islam,
I recommend to carry out in addition TEM shooting of the dried-up dispersion of particles. To construct function of distribution according to images and to compare with DLS. Thus z-averaging should be counted for n-averaging.
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