The Pechini method has been used as a synthetic route for obtaining self-assembling magnetic and plasmonic nanoparticles in hybrid silica nanostructures. The developed latent fingermarks using ZnO-SiO2 nanopowder were found to have excellent quality with very clear third-level ridges detail and had better visibility than commercially available white powder. The SPR method was also applied to wet nonporous surface. Powder dusting method was used for the development of latent fingermarks on various dry, nonporous, and semi-porous surfaces. The development of fingermarks was carried out by powder dusting and small particle reagent (SPR) methods. The mean particle size of ZnO-SiO2 nanopowder calculated through TEM was 32.9 nm. The novel nanopowder ZnO-SiO2 was synthesized via the conventional heating method and characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), energy-dispersive X-ray (EDX) analysis, transmission electron microscope (TEM), and X-ray diffraction (XRD). They are developed using various conventional powders. Thus, the Ag-rGO/PDMS hybrid nanocomposite films can be used as scaffolds for tissue engineering, as they limit antimicrobial activity.įingermarks are one of the most useful forms of evidence in identification and can provide generalized proof of identity in crime investigation.
In this context, it is believed these behaviors are due to the increase in cell adhesion capacity promoted by the rGO. In the cell viability assay, after 48 hours of contact, the group of 1 mL of Ag-rGO with PDMS was the only group that increased cell viability when compared to the control group. Using 1 mL of Ag-rGO in PDMS the antibacterial effectiveness against Staphylococcus aureus was limited, showing an increased amount of Colony Forming Units (CFU), after 24 hours of contact. Aureus) bacteria, after exposure times of 24 and 120 hours, as well as in the determination of cell viability on cultures of fibroblast cells (NIH/3T3).
The rGO material in poly(dimethylsiloxane) (PDMS) has been tested for antimicrobial activity against Gram-positive Staphylococcus aureus (S. The Ag-rGO nanosheets were dispersed into a polymer matrix and the composites evaluated for use as biological scaffolds. The resulting carbon framework consists of reduced graphene oxide (rGO) sheets or 3D networks, decorated with anchored silver nanoparticles. Silver-functionalized reduced graphene oxide (Ag-rGO) nanosheets were prepared by single chemical and thermal processes, with very low concentration of silver.
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