Current Nanoscience - Volume 8, Issue 5, 2012

We present a magnetic study of lithium ferrite nanoparticles of composition Li0.5Fe2.5O4, synthesized by a citrate gel decomposition method. The as prepared sample was composed of nearly spherical nanoparticles with an average particle size TEM∼12 nm. Further annealing at 573 K and 673 K for 4 hours did not increase particle size noticeably, while annealing at 973 K led to morphology changes and significant increase in siz Read More

We have investigated the magnetic and transport properties of nanoscaled Fe3O4 films obtained from Chemical Vapor Deposition (CVD) technique using [FeIIFe2 III(OBut)8] and [Fe2 III(OBut)6] precursors. Samples were deposited on different substrates (i.e., MgO (001), MgAl2O4 (001) and Al2O3 (0001)) with thicknesses varying from 50 to 350 nm. Atomic Force Microscopy analysis indicated a granular nature of the samples Read More

Kinesin motor proteins can hydrolyze ATP and unidirectionally transport specific cargo molecules along microtubule tracks (MTs). Engineering scientists interested in nanotechnology have used kinesin and MTs to build shuttles of 2 geometries. In the bead geometry, the kinesin shuttles transport cargos along the MTs. In the gliding geometry, cargos are carried by MTs, which glide on a kinesin lawn. To realize the goal of b Read More

Viscoelastic and other physical properties of cancerous cells are particularly important since cells interact with the extracellular matrix and other cells constantly during malignant proliferation, adhesion, invasion and metastasis process. Atomic force microscope (AFM) has an unparalleled advantage in the measurement of viscoelastic properties of living cells. In this paper, a stress relaxation test using atomic force microsc Read More

In the present study, polyethylenimine (PEI, 1800 Da) and liposome were combined in order to improve gene expression. A new gene delivery system (polycationic liposome) was developed by modification of liposomes with lipoploymers constructed from acrylate or bromoalkane derivatives. The polycationic liposome-plasmid DNA (pDNA) complexes were characterized for their size, zeta potential and ability for DN Read More

Pseudomonas aeruginosa is a common cause of nosocomial infections and severe infections in burn patients. It is one of the most important extended spectrum β-lactamase (ESBLs) producing bacteria. ESBLs can cause bacteria to resist antibiotics containing a β-lactam group. Problems due to antibiotic resistance have renewed trends toward using silver, because it has bactericidal properties, and there is a significant inc Read More

The purpose of this study was to investigate the effect of PEG-PBA-PEG nanoparticles as a carrier of quercetin and hyperthermia on the clonogenicity and DNA damages in spheroid model of DU 145 prostate carcinoma cell lines. Therefore, DU145 cells were cultured as spheroids and treated with different concentrations of quercetin / or nanoparticles as quercetin carriers for 24 hours and hyperthermia at 43°C for 60 Read More

Nanoparticles synthesized from sodium alginate are economically useful due to their wide applicability in various fields such as food, tissue engineering, biomedical implants and drug delivery. Sodium alginate used for synthesis of silver nanoparticles was extracted from the marine seaweed Padina tetrastromatica. The silver nanoparticles were synthesized by optimizing different parameters such as pH, temperature Read More

Biosynthesis of silver nanoparticles using the leaf extract of Amaranthus tristis was evaluated in the present report. The biosynthetic approach of nanoparticles synthesis deserves merit in biomedical applications due to its better biocompatibility. The biosynthesized silver nanoparticle was embedded in PVA polymer matrix as dispersed phase to craft an Ag/PVA nanocomposite membrane. The silver nanoparticles and the Ag Read More

Nanodimensional Zn1-xMnxS particles were synthesized with x=5, 10 and 15 wt % of Mn2+ ions by wet chemical method. Synthesized Zn1-xMnxS nanoparticles were characterized with X-ray diffraction (XRD) method, High resolution transmission electron microscopic (HRTEM) analysis, UV-Visible absorption spectroscopic method, Fourier transform infrared (FT-IR) analysis and vibrating sample magnetometer method. The X Read More

A characteristic comparison approach between Al/Cr and Cu/Cr nano-interfaces is developed for investigation of the potential probability to change the mechanical properties in the metal-matching nano-interface by considering thermal cycling and no-thermal cycling modes. The Cu/Cr interface and Al/Cr interface are prepared by using the magnetron sputtering. The nanoindentation method is used to test the mechanical proper Read More

Centimeter-scale well-aligned SiC/SiO2 core-shell nanowires were fabricated by a novel interlaminar vapor-diffusion reaction method in a double-channel quartz tube. The synthesized nanowires grew in a uniform direction perpendicular to a porous graphite substrate and were parallel to one another. The core-shell nanowires are 10 millimeters long and consist of β-SiC crystalline core of with diameters of 30-60 nm wrapped w Read More

In this paper, N-(3-Trimethoxysilylethyl)ethylenediamine (TMSEEDA) has been immobilized on silica nanoparticles (NPs) with diameter smaller than 100 nm by covalent bond grafting technique. The as-made particles can be used as cores to prepare core-shell mesoporous silica composites, which are encapsulated with a layer of ordered mesoporous silica through a surfactant-assembly method, resulting to uniform core-shel Read More

Functional polyvinylidene fluoride based composites filled with two-dimensional clay platelets and graphite nanosheets were prepared by means of solution mixing process. The dielectric responses of binary PVDF-clay and ternary graphite doped PVDF-clay nanocomposites were determined using broad band AC impedance spectroscopy. The results showed that the clay additions enhance permittivity of PVDF due to the form Read More

This work investigates the possible chemical bond formation between functionalized carbon nanotubes and alumina, in multiwall carbon nanotubes/alumina nanocomposite (MWCNT/Al2O3), with the aid of spectroscopic analysis. For this purpose, the nanocomposite MWCNT/alumina was synthesized via hydrothermal treatment. Different characterization techniques, scanning electron microscopy, energy dispersive X-r Read More

The free-radical graft polymerization of methacrylic acid onto surface activated nano silica particles was studied experimentally. Activated silica nanoparticle were modified using different concentration of 3-Chloropropyltrimethoxysilane (3-CTMS) to load the Chlor group by bonding with the organic functional group contained in 4-hydroxybenzoic acid (4-HBA). The carboxyl group of 4-HBA was then converted to vinyl ester gr Read More

Organic light-emitting diodes provide an excellent artificial illumination for greenhouse because it enables one to tailor the entire relevant spectral range from near infrared to near ultraviolet for optimal growth. We have fabricated a novel device to obtain the emission spectra that contained a deep blue and red emission, which fit well with the absorption peaks of chlorophylls a and b. The blue and red emission were produced f Read More

Biodegradable polymeric nanofibrosus meshes have emerged as a choice of scaffolds for cells to attach and grow as they mimic closely the nanoscale morphology of native extracellular proteins and promote cell-growth. Electrospun fibrous nanocomposite scaffolds of biodegradable synthetic polymer polycaprolactone (PCL) with surface modified carbon nanofibers (mCNFs) were successfully fabricated using the elect Read More

In order to study the in vivo performance and in vitro cytotoxicity of 10-hydroxycamptothecin (10-HCPT) nanosuspension developed in our previous work. For investigating the pharmacokinetics in rats and the tissue distribution in mice with10-HCPT nanosuspension and the 10-HCPT solution, 10-HCPT nanosuspension and 10-HCPT solution were intravenously administered to rats via caudal vein, respectively. And 10-HCPT nanosus Read More

In this paper, scandia, yttria stabilized zirconia (SYSZ) nanoparticles were prepared by a wet chemistry method based on the Pechini-type sol-gel method. In this approach, zirconium oxynitrate, scandium and yttrium nitrate, citric acid (CA) and ethylene glycol mono butyl ether (EGM) were used as the source of Zr4+, Sc3+, Y3+, the chelating and solvent agent, respectively. In this study, the effect of EGM:CA ratios and calci Read More