Nanoparticles with a wide range of unique features have been allocated many applications in the field of nanotechnology. Their special properties and their interaction with biological molecules have grabbed the attention of many researchers. These particles, because of their small size and unique characteristics, can be used in various fields, especially the life sciences. Because the lack of any logical model of nanoparticle and biomolecule interaction, their properties and influences on the environment have been evaluated using various separate and non-comparable studies. Nanoparticles interact with plants, animals, and humans and have various and essential impacts on them and these should be considered. The aim of this article is to conduct a morphological and proteomic study of the interaction of biomolecular, bacterial and plant models with silver nanoparticles. The findings are associated with trypsin and human blood serum albumin (as a molecular model), Staphylococcus aureus and Bacillus Thurigiensis (as bacterial models) and Oryza sativa L. (rice) as a plant model.

To avoid the loss of precious metal catalysts on carriers, a simple approach is introduced for sliver colloids having ' anchorages' hooked onto inorganic substrate surfaces. This method is based on the nanoreactor of solubilized copolymer micelles for the fabrication of Ag sphere particles. The hydrolysis of tert-butyl acrylate yields acrylic acid and a tri-block copolymer polystyrene-b-poly (acrylic acid) -bpoly (Y-methacryloxypropyltrimethoxysilane) (PS-PAA-PMPS), with PMPS as active functional moieties, was synthesized and characterized which can play strong interaction with inorganic substrates surface as an "anchorage". The PS-PAA-PMPS copolymer solution was prepared to solubilize metal salts to prepare nanoparticles as nanoreactors for in situ reduction. The degree of solubility increased with the increased hydrophilic PAA units but it was also restricted by its dimensional size resisting solubilization. Spherical particles in diameters of 10~30 nm were well dispersed and SEM images showed the hybrid silver colloids remaining on the glass substrate due to their firm adherence after elution. It was demonstrated that this special polymerprotected system provides a successful way for nanoparticles to form anchorage onto the glass surface with firm adhesion and stable properties. This kind of silver colloids conveniently form firm and stable coatings onto the glass substrate which might give longer service life as catalysts to be used in electromagnetic interference shielding, anti-microbial uses and catalytic reduction of p-nitrophenol.

Nanotechnology is getting an incredible drive due to the potential of manipulating metals into their nano-size particles. The synthesis and characterization of nanoparticles using green technology have many applications. The wet chemical techniques used presently in the synthesis of nanoparticles are deleterious along with flammable conditions. Silver nanoparticles have the capability of killing microbes effectively. This paper explains the green technology and pollution-free methodology for synthesizing silver particles at the nanoscale using 1mM silver nitrate solution from the extracts of Carica papaya, Emblica officianalis, Azadirachta indica, and Cocos nucifera. When the silver nanoparticles are synthesized the solution turns to brownish-yellow color. The tools used in the characterization of silver nanoparticles are Ultra Violet-Visible absorption Spectroscopy and Field emission Scanning Electron Microscopy. The solutions with silver nanoparticles showed the maximum absorption at 450 nm with Ultra Violet-Visible spectroscopy. It is found that C. Papaya and E. oficianalis showed the maximum absorbance of 0. 578 and 0. 59 respectively at 450 nm. The average range of the produced silver nanoparticles is analyzed to be 5-70 nm with FESEM and the shape is examined to be spherical.

In the present study, an attempt has been made to impart antimicrobial finishing to the cellulose fabric using nano silver solution at various concentrations (5, 10, 15, 20 and 25 ml) and an eco-friendly crosslinking agent by the exhaustion technique. Curing conditions were varied, keeping curing temperatures at 110oC and 100oC and curing times to 1 and 2 min. To assess the quality of the finished fabric, various properties such as washing fastness and zone of inhibition were studied. The zones of inhibition have been studied using Escherichia coli bacteria to determine antimicrobial activity of the fabric; the surface characteristics of these fabrics have been studied by scanning electron microscopy (SEM).In the case of the treated commercial cotton fabric product, the zones of inhibition are at a minimum of 14 mm and a maximum of 18 mm for Gram-negative bacteria. SEM study and antibacterial tests of the silver-finished fabrics indicated that, generally, silver nanoparticles were well dispersed on the fabric surface. Antibacterial test was used to estimate the biological activity of the treated fabrics, and Gram-negative bacteria (Escherichia coli) were used for this purpose. The washing fastness of finished textiles was investigated in terms of ISO 105 CO3-1982 standard. The results obtained proved the good and long-lasting bacteriostatic efficacy of silver nanoparticles applied during the finishing of cotton and viscose.

In the present study, the effect of particle size of divalent silver oxide has been studied on the electrochemical performance of cathode electrode in the primary zinc-silver oxide battery. Chemical deposition methods were used to produce the powder and the effective parameters in these methods were studied. These include parameters such as concentration, type and order of addition of reactants in the powder production process, addition of surfactant, reaction time and the effect of powder milling by planetary ball mill. X-ray diffraction spectrometer was used to confirm the divalent silver oxide synthesis. The morphology and size of the particles were analysed by scanning electron microscope. The electrodes were prepared by pasting method. Single cells were discharged using constant current of 20 A to evaluate the electrochemical efficiency of produced powders. Single cells contained two zinc electrodes and one silver oxide electrode. Scanning electron microscopy images showed that the morphology of the produced powders was flake type. Particle size reduction below 100 nanometer was performed using surfactant and control of reaction parameters. Results from high-rate discharge tests showed that the capacity and voltage of the optimized electrodes with nano powder were 42% and 0.11 V, respectively, higher than the capacity and voltage electrodes made with the conventional powder.

Background: Silver sulfadiazine cream is used extensively for burns, nonetheless, several adverse reactions and side effects are presented in multiple cases. The aim of this study was to compare the healing effect of nano silver-aloe vera composition and silver sulfadiazine on burns in experimental rat models. Objectives: The experimental study was performedon15 male Sprague-Dawley rats to compare the burn treatment with nano silveraloe vera combination and silver sulfadiazine in the animal laboratory. Methods: Two deep second degree burns on both sides of the abdomen were created. One side was covered by cream and the other by 1% silver sulfadiazine. Response to treatment was assessed by digital photography on day 28. Histological parameters, such as angiogenesis, fibrosis, epithelialization, and inflammatory reactions, were evaluated. Results: The average burn size in the nano silver aloe vera group was significantly lower compared to the average burn size of the silver sulfadiazine group (P < 0. 05). Upon pathologic assessment, the re-epithelialization of the epidermis on the fourteenth day in the nano silver group was significantly higher. In addition, this difference in terms of fibrosis and angiogenesis was observed on the fourteenth day and it was higher in the nano silver group (P < 0. 05). Conclusions: The use of nano silver compounds in combination with aloe vera compared to silver sulfadiazine cream can expedite re-epithelialization and wound healing in rats.