Deepak Singhwal

Away from acids; do not ever dry or filter a colloidal system.

Dear Dr. Deepak Singhwal,

in the following paper you can find a interesting methods for CdS nanoparticles storage before their characterization:

Synthesis and Characterization of CdS Nanoparticles Stabilized by Double-Hydrophilic Block Copolymers

Limin Qi, Helmut Cölfen, Markus Antonietti

Nano Lett., 1 2, 61-65 (2001)

In this case, a stable CdS colloidal solutions were stored at 10 °C in the dark and were characterized normally after 24 h of aging because the preliminary optical measurements have showed that the absorption and fluorescence characteristics of the obtained colloidal dispersions show a minor change within the first 24 h and then remained essentially unchanged for at least 2 months.

Available at: https://pubs.acs.org/doi/full/10.1021/nl0055052?src=recsys

Best regards, Pierluigi Traverso

Deer Deepak Singhwal

you may have encountered a particle oxidation problem, if the storage hard a long time.

cordially

thanks to all for their answers.

if i have to do characterization of CdS within two weeks, can i store it in desiccator?

Deepak Singhwal

In what form is your material? Colloidal sol or powder?

Sir, it is in the powder form (@ Alan F Rawle)