Abstract: The article focuses on photon drag effect under laser radiation in solid state materials. This effect causes a high concentration of nonequilibrium electrons in the area of the laser beam the exit out of material. Coulomb interaction of spatial charge of these electrons with the charged impurity atoms can cause their drift in the direction of laser radiation. The photon drag effect can be used in laser doping technology of thin films. In multilayer magnetic nanofilms the photon drag effect of polarized electrons can lead to magnetic reversal of magnetic layers, which can be used to control a high speed spin current in the elements of spintronics.

Abstract: Biosorption technology has gained tremendous importance in bioremediation and microbes could become the cheapest tool in detoxification of effluent streams. Aspergillus sp. isolated from the soil sample collected from the area near Hyderabad Metal Plating Industry, I.D.A, Balanagar, Hyderabad, India have been investigated in this study. The growth kinetics of Aspergillus sp. was studied by growing the fungi at different concentration of iron ranging between 0.2mM – 12 mM (Ferrous sulphate). The culture showed considerable inhibition of growth with iron when compared to the metal free controls. The maximum amount of iron was observed in the medium containing 3.0 mM concentration and further increase in the metal concentration was found to increase metal adsorption. Transmission Electron Microscopy analysis revealed the adsorption of iron nanoparticles on the cellwall.

Abstract: The capability of already available antibiotic drug ‘amoxicillin’ based on its fluorescent property has been explored. The fluorescent sodium salt of amoxicillin was used for the detection of heavy metals in aqueous solutions. It was found that Copper and Silver has a quenching effect on the fluorescence of amoxicillin. Cu²⁺ ions were detected in aqueous solution up to 1x10^-7 M and Ag¹⁺ ions up to 1x10^-6 M. Hg²⁺ ions were also detected in aqueous samples but in high concentration.

Abstract: In this paper we will analyse the feromagnetism in nanoparticles. We will try to explain why materials that do not exhibit magnetism at large scales, exhibit magnetism when nanoparticles of the same material are formed. This occurs because when the particle size is reduced, only one domain can form in one nanoparticle. These nanomaterials then exhibit magnetism at a large scale.

Abstract: This paper describes a simple and convenient procedure for the preparation of crystalline silver nanoparticles. One pot synthesis of silver nanoparticles free from stabilizing agent has been investigated. Aqueous solution of AgNO₃ has been reduced by N₂H₄.H₂O in presence of CH₃COONa. The aggregation of silver nanoparticles were prevented by CH₃COONa in chemical bath and then washed away, leaving crystalline silver nanoparticles. The whole experiment has been carried out at room temperature, using water as solvent and also within very less time. The particles synthesized were characterized by UV-Visible, FTIR, TGA, TEM & X-ray diffraction studies.