Really thanks for your answer Prof. Kenneth M Towe and Shen-Ming Chen. basically, i want to prepare some SPION with iron. So there is no problem in the starting materiel whether it is Fe(II) or Fe(III) i need the final products as magnetite (Fe3O4) and its oxidized form maghemite (γ-Fe2O3) . my expectation is synthesis should be carried out in acidic medium not alkaline medium.
Like jyoti mayekar response, most of the cases nano particle prepared in alkaline medium.
i have searched many articles related to nano particle synthesis and applications whether it is Co,Ni,Au,Ag,Si etc. all are prepared from alkaline medium.
so, simply, i am asking that irrespective of materials and final product ,is there any possibility to synthesis nano particle in acidic medium?.