Current Nanoscience - Volume 9, Issue 3, 2013

The properties of nanoscale titanium dioxide particles generated in-situ during a polycondensation process are explored and the compounds obtained are investigated as UV-stabilizing additives for the formation of ultradurable powder coatings. Beneficial effects of TiO2 nanoparticles for the long-term photoprotection of polyester composite materials under accelerated weathering conditions could be clearly demonstrated Read More

Nano-structured titania (TiO2) has received considerable attention in the field of biomedical research because of its numerous advantages and few health concerns. To produce good biocompatible biomaterial, we synthesized different structural nano-TiO2 and TiO2–chitosan (CH) nanocomposite by precipitation, hydrothermal, and in situ sol–gel methods. The prepared samples were characterized comprehensively. Nano-TiO2 pre Read More

A diverse pool of six semiconductor GaN nanopowders was synthesized by the thermally-driven pyrolysis of gallium imide at various temperatures. The XRD-derived average crystallite sizes for the nanopowders were in the range 1-17 nm. Standard nitrogen adsorption measurements at 77 K yielded the basic characteristics of the powder pore structures including the BET surface areas that spanned 23-287 m2/g. Rare studies Read More

The bilayer structures of graphenes and boron nitride nanosheets (BNNSs) with different interlayer spacings are optimized, and their Young’s moduli are calculated using the molecular dynamics method. The optimized results indicate that the optimal interlayer distances are about 0.343 nm for bilayer graphenes and 0.354 nm for bilayer BNNSs. A comparison of the binding energy, van der Waals interactions between lay Read More

WO3-MoO3 nanocomposite films with good electrochromic properties were prepared by the electrodeposition method. The surface morphologies and composition of the composite films were characterized by scanning electron microscope (SEM) and energydispersive X-ray analysis (EDS). Spectroelectrochemistry and electrochromic properties of the WO3-MoO3 nanocomposite films were characterized using cyclic voltam Read More

A new method was developed to grow zinc oxide (ZnO) nano-flowers via an organic solvent assisted growth technique. Flower-like ZnO nanostructures were successfully prepared from the solution method, without using surfactant, complexing agent or stabilizer. The influences of different organic solvents on the growth of ZnO nanostructures were investigated. A simple growth mechanism was proposed, to demon Read More

Owing to its special photoelectric properties, ZnO nanostructrues have attracted extensive attention. Here we reported a study on the effect of substrates and seeding layers’ thickness on the morphology of the resultant ZnO nanostructures. The atomic layer deposition (ALD) was used to pre-synthesized seed layers on different substrates, including polyethylene terephthalate (PET), graphene/PET, Ag/PET, Al/PET and Al2O3 Read More

We report, strong ultraviolet (UV) emission from ZnO nanoparticle thin film obtained by a green synthesis, where the film is formed by the microwave irradiation of the alcohol solution of the precursor. The deposition is carried out in non-aqueous medium without the use of any surfactant, and the film formation is quick (5 min). The film is uniform comprising of mono-disperse nanoparticles having a narrow size Read More

Metal oxide semiconductor nanofibers obtained by electrospinning are excessively used in organic-inorganic photovoltaic (PV) devices due to large surface area with low production cost. Performance of these devices depends upon the thickness of the active layer and polymer infiltration through the pores of nanofibers mat, which is controlled by electrospinning time. The parameters of hybrid photovoltaic devices, fabrica Read More

The detection of hexanal has attracted much attention because hexanal has an important effect on food quality and human health. In this paper, nano-SnO2 flat-type coplanar hexanal gas sensor arrays at the ppb level were fabricated by a screen-printing technique based on nano-SnO2 powders prepared by a sol-gel method. The test results show that the nano-SnO2 flat-type coplanar gas sensor arrays have good hexan Read More

Silver nanoparticles, exhibiting unusual properties of ionic ability associated with the particle suspension, have been extensively used as the anti-microbial agent in medicine. The present study addressed the elicitation potential of nanosilver particles for the enhancing plant secondary metabolite production. Ag-SiO2 core–shell nanoparticles (AgNPs) with an average size of 101.8 ± 8.9 nm were prepared as elicitor to th Read More

La/Sm-doped strontium-ferrite/poly-m-toluidine) (PMT) composites were synthesized by in-situ chemical polymerization of m-toluidine in the presence of La/Sm-doped strontium-ferrite particles. Structural, morphological and electro-magnetic properties of nanocomposites were performed by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), four-probe conductivity te Read More

There might be amorphous solid He-4 formed in around 6 nm (diameter) pore as reported recently. By treating the solid He-4 in confined nanodomains locally as an amorphous matter and using the Eyring's model together with the activation energies and volumes, we can observe sudden changes of the shearing stresses (which relate to the resistance) as well as shear viscosities (which relate to the rigidity) at corre Read More

Gd-substituted Mn-Zn ferrite (Mn0.5Zn0.5Gd0.02Fe1.98O4) nanoparticles were synthesized using chemical co-precipitation. Measurements of magnetization as a function of the applied field were performed at several temperatures. As expected, the saturation magnetization was found to decrease with temperature. However, fitting the magnetization data to a single Langevin function yielded an anomalous increase in the Read More

Degradation of C.I. Direct Red 23 (DR23) was investigated by photoelectro-Fenton (PEF) process in the presence of citrate catalyst under visible light irradiation of 6W. Multi walled carbon nanotubes (CNTs) were characterized by transmission electron microscopy (TEM), which had approximately internal and external diameters of 6 nm and 22 nm, respectively. CNTs were stabilized on carbon paper utilizing polytetraf Read More

The present work aims at designing of a novel hexagonal porous structure of alumina to improve the efficiency of dehydrogenation catalysts. Alumina was prepared by solvent thermal method under supercritical conditions in presence of ethanol. X-ray diffraction was used to identify alumina after calcinations at 600 °C. Scanning electron microscopy images confirmed that the alumina particles are in the nano-scale a Read More

The present study aims to investigate the drug-loaded mechanism of ion–cross-linked nanoparticles (NPs) in the presence of polyvinylpyrrolidone K30 (PVP K30) and set up the optimal PVP-coated norcantharidin (NCTD) chitosan NPs method. We compared and assessed PVP-coated norcantharidin chitosan NP (PVP-NCTD-NP) with norcantharidin chitosan nanoparticles (NCTD-CS-NP) using Xray diffraction (XRD) and at Read More

We investigated top-contact pentacene-based organic thin-film transistor (OTFTs) with bi-layer MoO3/Au electrodes. The device performance including field effect mobility, threshold voltage, and On/Off ratio was highly improved in a device with 5 nm MoO3 layer which showed the highest field-effect mobility of 0.72 cm2 V-1s-1. In addition, from temperature dependence characteristics, we observed that the barrier height Read More

For a molecular graph G with vertex set V (G) , we denote by dG (u,v ) the distance between vertices u and v in G ...

Polymerase chain reaction is a critical scientific technique in molecular biology. With the higher demand of PCR, recently, researchers have demonstrated various effects that take place when nanomaterials (NNMTs) are used as additives in PCR, which is defined here as Nano-PCR. Quantitative and qualitative understanding of the effect of NNMTs on PCR after adding different NNMTs into PCR systems has also emerg Read More