In the past I worked with silica nanoparticles bought from "Nissan Chemicals", Product No. ST-40, see link for other types.
In the company site I can't find that silica anymore.
How can I get that kind of silica NPs.
Is there similar product I can get elsewhere?
Specs: unstabilized 40 Wt%, 10-20 nm size, spherical, pH ~10.
It is crucial that the silica NPs should be free from any stabilization agent, especially from organic stabilizers.
Look the book Iler R.K. The Chemistry of Silica. Wiley-Interscience. 1979. This is the most complete monograph on colloidal silica. I myself have often used it when I was a post-graduate student. I am sure that you can find there an answer to your question.
Thank you.
I also have that book, but I believe that there are companies newer than that book.
Try the LUDOX series from Sigma Aldrich. The series has many variants in size, size distribution and stabilizing method.
e.g. LUDOX® TM-40 colloidal silica , sodium hydroxide stabilized.
Good luck.
Try Sigma-Aldrich. They have variety of surface modified silica nanoparticles.
I tried Ludox, but they have a stabilizer in there. The Ludox solution has an absorption at 300 nm, which does not come from the silica. I can't use nanoparticles with stabilizers as I react them with radicals which are extremely active.
Why don't you try Postnova Analytics? They're a german company with a wide range of nanoparticles, including silica, with our without surface functionality. Size range from 70 nm to 2 um.
Hi Tomer,
I want silica particles with same properties, by the chance did you found any ?
Anna,
I found this product: https://www.alfa.com/en/catalog/043111/
They have several sizes of SiO2.
I have already bought it, but haven't tried it yet.
Nanochemazone Canada has huge collection of Metal oxide nanopowders such as TiO2 nanopowder, Al2O3 nanopowder, SiO2 (Silica) nanoparticles, Bismuth Oxide, Boron Oxide etc.
Prices are very affordable
www.nanochemazone.com
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