I have 13 nm citrate capped gold nanoparticles colloids which I centrifuged at 17000 g. I would like to know that within how many hours should I redisperse it in a liquid media before the gold nanoaprticles start agglomerating?
Just as an additional idea: you can monitor the size of your colloidal gold with dynamic light scattering, to confirm whether aggregates appear or the sample is unchanged: https://instrumat.ch/wp-content/uploads/2016/08/MRK956-01-Characterisation-of-colloidal-Gold-using-DLS-LRLL.pdf