Materials Literature
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The purpose of this research was to investigate chitosan-based composite sponge containing silver nanoparticles (Ag NPs) for wound dressing application. The composite sponge was prepared by a freeze-drying technique, and then immersed in AgNO3 solution with different concentration and autoclaved at 15 psi, 121 degrees…
Depth profiles of the oxidation degrees of cross-linked polyethylene (XLPE) cable insulation irradiated by gamma rays at dose rates of 3, 17, and 100 Gy/h at 80°C were measured with a micro FT-IR, and the relationship between the oxidation degree and the elongation at break was examined. The oxidation degree was defin…
In this study, we investigated carbon feedstock decomposition conditions on the synthesis of single-walled carbon nanotubes (SWNTs) by chemical vapor deposition. We simulated gas-phase thermal decomposition of ethanol and dimethyl ether (DME) at typical SWNT growth conditions using the chemical kinetic model, and conf…
Abstract Light‐induced structural changes of As‐S glasses and films were probed both by macro FT‐Raman and photon‐energy dependent micro‐Raman spectroscopy using different spectral composition of photoactive light: polychromatic or different wavelengths of laser radiation. The polychromatic illumination and thermal tr…
Peptide nanotubes (PNT) are emerging alternates frontier to carbon nanotubes (CNT). PNT’s can be engineered by solid phase synthesis with desired properties. Chemically PNT’s are reactive in sharp contrast to CNT’s and hence require less site specific functionalization for nanotechnology applications. In this paper we…
The temperature dependence of the linear permittivity and the third harmonic generation amplitude of nanocomposites representing nanoporous silica matrices (opal matrix and SBA-15) with triglycine sulfate embedded in pores has been studied in the region of the ferroelectric phase transition. A broadening of the phase…
We have investigated the effect of zinc oxide as a photocatalyst and durable flame-retardant on cellulosic fibers. Zinc oxide nanocrystals were successfully synthesized and deposited onto cellulosic fibers using sol-gel process at low temperature. The samples were characterized by means of several techniques such as s…
Abstract The Kütahya kaolinite deposits are the most important source of raw materials for the ceramics industry in Turkey. To date, no detailed mineralogical or geochemical characterizations of these materials have been carried out; the present study aims to fill that gap. The Kütahya kaolinite deposits formed by alt…
The proper performance of electro-optical devices utilising liquid crystals (LCs) requires materials with high diffraction efficiency, i.e. with high optical/dielectric anisotropy, low threshold voltage and fast switching. One can achieve increase of dielectric anisotropy by using chemical synthesis or mixing LC mater…
In this paper the behavior of positive charge formed in the vicinity of the Semi-conducting sheet anode at room temperature and under applied dc has been investigated just after the reversal of the sample, and when the sample was combined with another sample without pre-stressing using the pulsed electro acoustic (PEA…
Conductivity relaxation and charge transport mechanisms in polypyrrole (PPy) nanofibers synthesized using a micellar polymerization technique with varying surfactant concentration has been investigated by dielectric relaxation spectroscopy. TEM micrographs depict that the increasing surfactant concentration leads to t…
The dichloromethane extract from the leaves of Calotropis gigantea Linn. was strongly cytotoxic against non-small cell lung carcinoma (A549), colon carcinoma (HCT 116) and hepatocellular carcinoma (Hep G2), and non toxic to Chinese hamster ovary (AA8). The extract afforded uscharin (1), 3,5,8-trihydroxy-24-methylchole…
UNLABELLED: Research in the development of nanoscale drug carriers primarily focuses on maximizing drug delivery efficiency to tumor tissues. However, less attention has been given to minimizing drug toxicity to non-targeted cells to enhance therapeutic selectivity. AIM: Herein, we report on the use of a newly develop…
We study the dynamics of carriers in graphene subjected to an inhomogeneous magnetic field. For a magnetic field with a hyperbolic profile the corresponding Dirac equation can be analyzed within the formalism of supersymmetric quantum mechanics, and leads to an exactly solvable model. We study in detail the bound-stat…
OBJECTIVE: Toxicology studies suggest that carbon nanotube (CNT) exposures may cause adverse pulmonary effects. This study identified all US engineered carbonaceous nanomaterial (ECN) manufacturers, determined workforce size and growth, and characterized the materials produced to determine the feasibility of occupatio…
Abstract Melamine cyanurate (MCA) was utilized as an environmental friendly additive to prepare the nonhalogen flame retardant MCA/Nylon 66 composites by melt blending technique. Because of the strong hydrogen bond interactions and fine interfacial compatibility between MCA and Nylon 66, the resultant even dispersion…
A multiphoton process to the conduction band of the insulator Er2O3 is reported, which occurs in vacuum under near infrared excitation. The enormous upconversion intensity is two orders of magnitude greater than that in air, and also the intensity ratio for green and red emission bands is inverted. The mechanism is pr…
Ultra-high frequency (UHF) methods for detecting and locating partial discharges (PD) are well established for gas insulated equipment. This paper provides an overview of their application to power transformers, discussing practicalities, capabilities and challenges. In recent years, UHF PD detection has proved helpfu…
We present a theoretical study on interactions of electrons in graphene with surface acoustic waves (SAWs). We find that owing to momentum and energy conservation laws, the electronic transition accompanied by the SAW absorption cannot be achieved via inter-band transition channels in graphene. For graphene, strong ab…
Transverse piezoelectric property of 0.91Pb(Zn(1/3)Nb(2/3))O(3)-0.09PbTiO(3) (PZN-9%PT) single crystal poled along [011] direction under different fields have been investigated, the poling field giving the best property was between 350 and 650 V/mm at room temperature. Full tensorial elastic, dielectric, and piezoelec…