Most well-rounded, of Uncoated negatively charged silver nanoparticles for biomedical and electronic application.

L. Scotti
University of Chieti,
Italy

Keywords: nanoparticles, electronic, biomedical

Summary:

In the last decades the new interdisciplinary field of nanoscience has rapidly grown and nanoparticles have attracted much attention due to their unique chemical and biological properties. In particular, silver and gold nanoparticles can be prepared in the presence or in the absence of a stabilizing agent as sodium citrate, to be employed for antimicrobial applications, biosensor, composite materials and electronic componentsA new electronic device has been assembled and employed to obtain a stable solution of spherical uncoated silver nanoparticles (SNPs) in only 10 min. Purification procedure have been optimized; different techniques as UV–vis spectroscopy, transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), dynamic laser light scattering (DLS) have been carried out to characterize the SNPs in size, shape and morphology. The stability of the SNPs solution has been tested by Zeta- Potential measurements. The results presented herein show that the obtained nanoparticles kept in the dark at 5 °C under inert atmosphere remain stable for at least 1 month. The plasmonic, superparamagnetic and fluorescence properties, described as physical identity, as well as the biological behavior and the engineered surface coating, described as synthetic identity, depend on the nanoparticles core. The ultra Nano particles obtained (< 5 nm) present a verasatile application such as biomedical (antibacterical, drug delivery,...) and electronic (condenser with nano size, quantum dots,...) Now I would like present the evidence of this application. Studies in microbiological field and evidence of singular property (ex.:surface effect, membrane link,...) are tested.