I am talking about a water dispersion of a Cobalt Ferrite ( #ferrofluid ). An industrial product of Nanum. The ink industrial pattern use as standard this statment:
- Black ink with carbon black is absorbent.
- Another ink could be transparent or absorbent.
So they rated our dispersion as absorbent, but, using a UV espectroscopy we saw that our ferrite is fifty to fifty transparent in 770nm (wavelength). We have a Malvern Zetatrac and we set ours samples as transparent and they (a big buyer) set as absorvent.
The results are incredibly diferrent as below:
absorsorvent - irregular
Another thing: Should I consider this particles sphericals or irregulars?:
AFM print sample
TEM
Regards,
Tarik Della Santina Mohallem
R&D Director
Nanum Nanotecnologia SA
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