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Synthesis, characterization, and manipulation of dendrimer-stabilized iron sulfidenanoparticles

Author:
Xiangyang Shi   Kai Sun   Lajos P Balogh and James R Baker Jr  


Journal:
Nanotechnology


Issue Date:
2006


Abstract(summary):

FeS nanoparticles (NPs) were synthesized using ethylenediamine corepoly(amidoamine) (PAMAM) dendrimers of generation 4 terminated with amino(G4·NH2), hydroxyl(G4·NGlyOH), andcarboxyl (G4·SAH) groups, respectively, as stabilizers. These dendrimer-stabilized FeS NPs (FeS DSNPs) werecharacterized by ultraviolet–visible (UV–vis) spectrometry, zeta-potential measurements,and transmission electron microscopy (TEM). Deposition of FeS NPs onto mesoporoussilica gel microparticles was attempted using two approaches: (A) direct coating of{FeS–G4·NH2} DSNPs onto silica particles; and (B) usingG4·NH2-coated silica particlesto incorporate Fe2+ ions for the subsequent formation of FeS NPs. Scanning electron microscopy (SEM) studiesshow that approach (B) was much more efficient in the incorporation of FeS NPs thanapproach (A). Such preparation and manipulation of FeS DSNPs provides a uniquestrategy for fabricating various reactive nanoplatforms for environmental remediationapplications.


Page:
4554-4560


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