Current Nanoscience - Volume 8, Issue 6, 2012

The current study was designed to find out the cancer cell killing efficacy of as-synthesized dumbbell-shaped Fe3O4 and γ- Fe2O3 magnetic nanoparticles under AC (alternating current) magnetic-fields induction condition. Dumbbell-shaped Fe3O4 and γ-Fe2O3 magnetic nanoparticles were successfully prepared by a modified hydrothermal method. Ferrous chloride tetrahydrate was solely used as a precursor for the na Read More

Aim of this work was to study the technological parameters influencing the adsorption process of Bovine Serum Albumin (used as model protein) on the surface of PLGA (polylactic co-glycolic acid) based nanoparticles. Several factors as adsorption mediums, concentration ratio between proteins and nanoparticles, temperature, time of incubation were evaluated and main importance was done to the chemical characteristics of p Read More

The interaction between human serum albumin and cholesterol-modified pullulan (CHP) nanoparticles with different degrees of substitution (DS) of cholesterol moiety was investigated using spectroscopic and thermodynamic methods. Albumin fluorescence intensity was quenched by nanoparticles with maximum emission intensity decreasing at the initial reaction and increasing at the last reacted period. Binding const Read More

Stable silver nanoparticles (AgNPs) with narrow size distribution were non-enzymatically synthesized through hydroxyl ions (OH-) assisted bioreduction of diamine silver complex with dry Aeromonas sp. SH10 cells. The effects of reaction temperature, concentrations of OH-, silver and the dry cells on the reduction of Ag ions as well as on the properties of the AgNPs were investigated. Results show that the introduction Read More

The least efficacy of most of the active pharmaceutical ingredients in the brain is attributed to the blood–brain barrier (BBB), which represents insurmountable obstacle for the effective management of majority of CNS disorders. The present research was planned with the objective to design novel poly (d, l) lactide (PLA) nanoparticles coupled with natural tripeptide i.e. glutathione to enhance drug delivery to brain. To evaluate Read More

Nanosized Nd-doped strontium ferrites, SrNdxFe12-xO19, with x=0.3, were successfully prepared through a chemical coprecipitation process. The samples were characterized by TG-DSC, XRD, FT-IR. The results of TG-DSC and XRD showed that the single phase of Nd-doped strontium ferrite formed directly through the reaction of SrCO3, amorphous Fe2O3 and Nd2O3, without other intermediate phases. The crystallite size wa Read More

The core-shell structure SiO2@Ag nanoparticles were synthesized by a facile chemical reduction method. Firstly, the mercapto- silica spheres had been prepared by the stober method, in which 3-mercaptopropyltrimethoxysilane (MPS) was used as a sole silica source. The reaction involves mixing the MPS precursor, ammonia in aqueous solvent at room temperature. Secondly, the core-shell structure SiO2@Ag nanoparticles Read More

Nanoparticles as antimicrobial agents are a novel field in nanomedicine and nanobiotechnology. Unlike many investigations about antimicrobial effects of silver nanoparticles, few experiments have been conducted about the impact of iron-oxide nanoparticles on microorganisms. In the current paper, we have synthesized and characterized amino acid (L-arginine and L-lysine)-coated magnetite nanoparticles and evaluat Read More

Mesoporous, magnetite based nanoparticles (MNPs) were successfully synthesized by a modified precipitation method. For this purpose, the precursors' solution was sprayed into a sodium hydroxide or sodium hydroxide/citrate precipitation bath. In order to determinate the structure and morphology of the as-synthesized mesoporous MNPs the following methods were used: X-ray diffraction (XRD), Brunauer–Emmett–Teller Read More

In the present paper, we have described the interesting behavior of molybdophosphoric acid (H3[PMo12O40], HPMo) in the size-controlled synthesis of silver nanoparticles under UV-irradiation. In this process which is based on the reduction of Ag+ (AgNO3), HPMo plays the role of photocatalyst, reducing agent as well as stabilizer, and propan-2-ol acts as a sacrificial agent. The method allows the rapid synthesis of uniform spheric Read More

Vinorelbine tartrate is a semi-synthetic drug with a broad-spectrum anti-tumor activity. An injectable formulation of vinorelbine (Navelbine® IV) has been widely used in the world, despite existing some disadvantages. In this study, in order to improve the efficacy of vinorelbine injection metabolism with minimal side effects, rHSA nanoparticles entrapping VLBT were prepared by a desolvation procedure, and subsequentl Read More

Self-decoration of silver (Ag) nanoparticles on the surface of titanium dioxide (TiO2, Degussa P25) photocatalyst are prepared via simple solution chemistry in absence of specific organic ligands for metal reduction, with an available natural light source. An in-situ method is carried out for the self-induced decoration of Ag nanoparticles onto the TiO2 surfaces and the properties of the metal nanoparticle have been revealed bas Read More

A study on the uptake of silica source by maize seeds was conducted under hydroponic conditions and pot experiments supplemented with nano-SiO2 (20–40 nm) extracted from natural source (rice husk) and their bulk silica counterparts such as micro-SiO2, sodium silicate, and silicic acid. Employing hydroponic incubation experiment to explore the nanosilica absorption is a novel approach in maize. Seeds after different sili Read More

The temperature-dependent property of band gap in colloidal PbSe quantum dots has been investigated from both experiment and theory above room temperature. When the particle size increases, the temperature coefficient evolves from negative values to zero and then to positive value following the trend to its bulk material value. The calculated critical size of 4.88 nm for the temperature coefficient dE / dT = 0 is consist Read More

We report efficient conversion of any of the primary colors to white light under ambient conditions, by ZnO nanostructures. Not only UV, blue, and NIR LEDs, but also the green and red LEDs can be used for the production of white light. The conversion efficiency is supposed to be high and it is possible to tune the nature of white light (warm, natural and cool). Correlated color temperature can be tailored by changing the excitat Read More

High quality 3%Cu-SnO2 nanoparticles have been prepared onto the glass substrate by using novel and economical ultrasonic spray pyrolysis technique. The X-ray diffraction patterns showed that 3% Cu-SnO2 nanoparticles formed in tetragonal rutile structure. The intensities of peaks shown by X-ray pattern were indexed as (110), (101), (200) and (211). The microstructure, surface morphology, particle size and eleme Read More

Silicon and polysilicon based nanogap electrode devices have been developed. The devices are able to detect lower concentrations of yeast at various pH values. Nanogap electrodes sense subtle changes due to molecular species perturbing the electrochemical signals across the gap. Two different materials and size of the nanogap electrodes were used to detect the biochemical solutions. Silicon and polysilicon nanogaps el Read More

In this communication, we report on a novel green photocatalytic route to synthesize Au nanoparticles/multi-walled carbon nanotubes (AuNPs/MWCNTs) nanocomposites with the use of Sn-porphyrin (SnP) as a high-efficiency photocatalyst to reduce Au3+ to form AuNPs onto MWCNTs. Such AuNPs/MWCNTs nanocomposites exhibit good catalytic performance toward both oxidation and reduction of H2O2. An el Read More