Signal analysis with Zetasizer on the effect of Poly (Ethylene Glycol) (PEG) to stabilize and unify colloidal gold nanoparticles

This paper reports a study on the effect of the Poly (Ethylene Glycol) (PEG) on the stability and uniformity of the colloidal gold nanoparticles. Sodium Borohydride (NaBH
₄
) and Trisodium Citrate (Na
₃
C
₆
H
₅
O
₇
) were utilized as the reducing agents to produce gold nanoparticles in this paper. Comparison of the two reducing agents has showed the Na
₃
C
₆
H
₅
O
₇
produces more stable gold nanoparticles solution. With the PEG1000, the gold nanoparticles showed obviously higher uniformity, which produce a desirable monodispersed gold nanoparticles solution.