In this paper, we report on the space-selective precipitation of silver nanoparticles in ion-exchanged silicabased glasses, by simultaneous continuous wave UV exposure and heat treatment. Changes in the absorption spectrum of the glass are explained by the growth of the silver nanoparticles when increasing the UV power density and the annealing temperature. Nanoparticles of average diameter 40 ...

Bimetallic nanoparticles have emerged up as advanced nanomaterials due to the synergism between two metallic nanoparticles in core-shell or alloy arrangement. Moreover, bioinspired synthesis of nanoparticles is an evergreen approach of nanobiosciences. In this experiment, we have fabricated silver, gold and silver (core) gold (shell) bimetallic nanoparticles using leaf extract of Catharanthus r...

objective(s): to evaluate the influences of aqueous extracts of plant parts (stem, leaves, and root) of portulaca oleracea l. on bioformation of silver nanoparticles (agnps).materials and methods: synthesis of silver nanoparticles by different plant part extracts of portulaca oleracea l. was carried out and formation of nanoparticles were confirmed and evaluated using uv-visible spectroscopy an...

The biological process with the ability to study the shape of particles produced would therefore be a limelight of modern nanotechnology. The bacterial strain Escherichia coli, used for the biosynthesis of silver nanoparticles were investigated. These silver nanoparticles were characterized by means of UV–vis spectroscopy, particle size analyzer. The nanoparticles exhibited maximum absorbance a...

Various plant materials for the synthesis of nanoparticles is considered a green technology, In the present study reports the synthesis of Silver nanoparticles were synthesized from Calotropis gigantea leaf and the formation of silver nanoparticles was observed with different time intervals. The results recorded from UV-Vis spectrum, scanning electron microscope, X ray diffraction and Fourier t...

This paper describes magnetic properties and microwave absorption properties of polymer-protected cobalt nanoparticles. Cobalt nanoparticles were prepared using the thermal decomposition of dicobalt octacarbonyl in ethylene glycol. They were stabilized and dispersed by coexisting with poly(N -vinyl-2-pyrrolidone) (PVP), resulting in an average diameter of 45 nm. The X-ray diffraction (XRD) anal...

Cobalt-doped magnetite (CoxFe3 -xO4) nanoparticles have been produced through the microbial reduction of cobalt-iron oxyhydroxide by the bacterium Geobacter sulfurreducens. The materials produced, as measured by superconducting quantum interference device magnetometry, X-ray magnetic circular dichroism, Mössbauer spectroscopy, etc., show dramatic increases in coercivity with increasing cobalt c...

Spherical and needle-like cobalt nanoparticles incorporated on rice husk silica was synthesized by a simple, rapid and eco-friendly sol-gel route at room temperature. This was achieved by direct mixing of 20 wt.% Co with sodium silicate from rice husk under ambient conditions to form RH-20Co. The cobalt was found to be isomorphously substituted in the silica matrix. A good dispersion of cobalt ...

The present study mainly focuses of combined action of Nepali hog plum as well as citrate synthesized silver nanoparticles (AgNPs) and Amikacin, as an antibiotic. The synergistic actions of citrate stabilized silver nanoparticles (AgNPs with chem) were compared with that of Nepali hog plum Choerospondia saxillaris (Lapsi) synthesized silver nanoparticles (AgNPs with plant), together with action...

Here in this paper we have reported the extracellular biosynthesis of silver nanoparticles by using filamentous fungi Penicillium sp. The Penicillium sp. was isolated from the soil sample collected from vegetable market in Chennai, Tamil Nadu, India. The purified fungal culture was subjected for the biosynthesis of silver nanoparticles. The color change of the solution in the conical flask into...