Preparation and characterization of PEG-assisted growth of colloidal Ag nanoparticles

Abstract

Colloidal Silver nanoparticles were prepared under mild conditions using poly (ethylene glycol) (PEG) in the presence of PVA as surfactant. Ethylene glycol was used as a reducing agent for the preparation of metal particles at room temperature. Ag +1 can be smoothly reduced to silver nanoparticles at ambient condition in PEG 400. UV-visible studies demonstrated that the reducing rate of Ag +1 to nano-Ag was remarkably enhanced with the increased amount of the PEG. The transmission microscope images prove that the reduced Ag nanoparticles were spherical in shape. The pathway described here was considered as a green route for preparation of silver nanoparticles.

Reflective FT‐NIR and SERS studies of HER‐II breast cancer biomarker using plasmonic‐active nanostructured thin film immobilized oriented antibody

“…The UV-vis spectra of the surface-functionalized colloidal 100 nm gold nanourchins are shown in Figure 3. Figure 4A shows that the ADH is conjugated to PEG linker with a strong ADH absorbance intensity at ≈220 nm and a weak peak at ≈460 nm, which corresponds to the PEG [53,54]. Figure 3B is a magnification of the PEG spectrum with a broad band between 455 and 485 nm.…”