Volume 1 Issue 1

Authors: A. Yousefnejad; I. Kazeminezhad; Sh. Saeidi; G. Nabiyouni

Abstract: We have prepared supermalloy (Ni-Fe-Mo) thin films using electrodeposition method. In this work electrodeposition of supermalloy took place in a single electrolyte containing Ni+2, Fe+2, and Mo+2 ions, under potentiostatic control (constant potential). Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray analysis (EDX) techniques were employed to investigate the morphology and chemical composition of the films. The result indicates that the weight percent (wt. %) of Ni and Mo, decreases by increasing the film thickness while the weight percent of Fe, increases as the film thickness increases. The magnetic properties of the supermalloy films have also been studied using alternating gradient force magnetometer (AGFM).

Keywords: Supermalloy; Electrodeposition; Magnetic Properties

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Authors: M. Ertu?rul; R. Dilber; G Turgut; S. Aydin; M. Yilmaz

Abstract: LiCoO2 is generally used as cathode active material for the lithium based batteries. Due to the extraordinary properties of nanostructure materials, researchers focus on the synthesis of Nano structured cathode, anode and electrolyte materials. In this study, we aimed to have LiCoO2 nanostructures prepared by solid state reaction technique and investigate crystal structure. We examined the effect of calcinated time on the crystallization; therefore samples were prepared in the same conditions and calcinated at 900ºC but in different calcinated times. Obtained results were discussed. Then, nickel doped LiCoO2 was prepared with the same technique and under same conditions. Subsequently, the effect of nickel dopant was evaluated. Thermal stability of the LiCoO2 precursor powders evaluated by TGA/DTA analysis using Netzsch STA 409 and heating rate was adjusted 10°C/min up to 900°C in air atmosphere. Obtained crystal structures were investigated with XRD, surface morphology was investigated by SEM and results were discussed.

Keywords: LiCoO2; LiNixCo1-xO2; Solid State Reaction Technique

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Authors: Jaya Bajpai; Gurvindar Kaur Maan; A.K. Bajpai

Abstract: In most of the cases where conventional dosage forms are used, only a small amount of administered dose reaches the target site, while the majority of the drug distributes throughout the rest of the body in accordance with its biochemical properties. Therefore, one of the most attractive areas of research in drug delivery today is the design of nanosystems that are able to deliver drugs to the right place, at appropriate times and at the right dosage. The present study reports a novel strategy for the preparation of nanoparticles of alginate and chitosan by microemulsion crosslinking technique. Morphology and structural characterization of prepared nanoparticles were investigated by transmission electron microscope (TEM) analysis, and Fourier transform infrared spectra (FTIR), respectively. Nanoparticles were tested for cytotoxicity with human foreskin fibroblast (HFF) cells. The particles were allowed to swell in phosphate buffer saline (PBS) and the influence of factors such as chemical composition of nanoparticles; pH and temperature of swelling bath were studied on water sorption capacity of nanoparticles. The prepared nanoparticles could prove to be an excellent option as carrier for controlled and targeted delivery of anticancer drugs.

Keywords: Chitosan; Alginate; Swelling; Nanoparticles

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Authors: Lev N. Krasnoperov; Salvatore A. E. Marras; Maxim Kozlov; Shyamala Pillai; Arkady Mustaev

Abstract: Luminescent lanthanide probes possess long emission lifetime, which enables their hypersensitive detection in time-resolved mode that avoids short-lived background fluorescence. Sharply spiked emission spectra of lanthanide probes and large Stokes shifts further enhance detection sensitivity, which is about 1000 fold higher than that for regular fluorescent probes. The wide spread of this promising technology is limited by high cost of commercially available compounds, which is mainly due to their complex structure and laborious synthetic procedure. In this study, new efficient strategies to simplify the synthesis of the probes were explored. New lanthanide chelates, containing click-, and amine-reactive cross-linking groups, which are highly bright and can be produced with high yield, are synthesized and characterized.

Keywords: Quinoline; Quinolone; Lanthanide; Luminescence; Cross-Linking; Probes

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