Photoinduced formation of gold nanoparticles into vinyl alcohol based polymers

Abstract

Nanocomposites based on vinyl alcohol-containing polymers and nanostructured gold have been efficiently prepared by a UV photo-reduction process. The very fast process provided dispersed gold nanoparticles with average diameters ranging from 3 to 20 nm depending on the host polymer matrix and the irradiation time. Uniaxial drawing of the irradiated Au/polymer nanocomposites favours the anisotropic distribution of packed assemblies of gold particles, providing oriented films with polarization-dependent tunable optical properties. These pronounced dichroic properties suggest that the nanocomposite films could find potential applications as colour polarizing filters, radiation responsive polymeric objects and smart flexible films in packaging application

Poly(Lactic-co-Glycolic) Acid as a Carrier for Imaging Contrast Agents

“…PVA acted as both a reducing agent and macroscopic support for the growing silver seeds on the PLGA particle. The mechanism of photoreduction using PVA was similar to that reported elsewhere for gold reduction (38) (Fig. 10).…”

Characterization of gold nanoclusters synthesized on carbon nanotubes film: Evaluation of the size distributions by means of X-ray photoelectron spectroscopy

“…For example Pucci et al reported the reduction of HAuCl 4 molecules adsorbed on dried vinyl alcohol-containing polymers [23].…”

Synthesis and characterization of biopolymer agar mediated gold nanoparticles

“…The UV-vis absorption spectrum of chitosan/ AuNPs nanocomposite exhibited characteristic SPR peak at 542 nm [18]. In addition, Pucci et al [19] synthesized AuNPs using poly (vinyl) alcohol (PVA) under UV irradiation with different time duration and found that the AuNPs showed characteristic SPR band at 550 nm. As can be seen in Fig.…”

“…These results are in good agreement with those reported by Huang and Yang [14], and Jin et al [17] for chitosan/AuNPs nanocomposites. Pucci et al [19] also found that TEM images of PVA-stabilized AuNPs showed spherical shape of nanoparticles with average size of 3-20 nm. The presence of elemental gold in the formed nanoparticles was examined by energy dispersive X-ray (EDX) analysis.…”