Materials Literature
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Abstract Many advanced materials today derive their function from precise control of point defects. Through manipulation of point defects, the electrical, optical, mechanical, and other properties of materials can be systematically modified and optimized. This feature paper illustrates the type of progress that has be…
This study describes the fabrication of multilayer microporous alumina-titania self-assembled thin-film by dip-coating using sol – gel method on glass substrate. First layer of mesoporous alumina film was synthesized using alumina sol composed of aluminium trisec- butylate as precursor, 2-propanol, as solvent and ethy…
AIMS: This paper presents an analysis of lag phase phenomena in Saccharomyces cerevisiae growth as a function of ultrasonic irradiation. METHODS AND RESULTS: Pulse irradiation treatments were performed by a 20 kHz ultrasonic transducer with different durations and energies. Data obtained from experiments were then emp…
Wound healing and ulcer management is a vast topic that stimulated clinical research due to its major socio economic impact on clinical practices. Last decade of research in clinical science has seen materials at microscale developments which significantly contributed to ulcer management and wound healing with their m…
Optical properties of semiconductors can exhibit strong polarization dependence due to crystalline anisotropy. A number of recent experiments have shown that the photoluminescence intensity in free standing nanowires is polarization dependent. One contribution to this effect is the anisotropy of the dielectric functio…
Homogeneous freestanding films have been obtained by the direct current (DC) magnetron sputtering technique using a sacrificial layer. After annealing, the films are crystallized with a strong out-of-plane texture along the (022) direction. The stoichiometry of the annealed films is close to the target composition and…
DC conductivity of electron doped antiferromagnetic Ca1-xNaxMnO3 (0 ≤ x ≤ 0.3) perovskites has been studied elaborately. Na doping initially increases the dc conductivity and decreases the activation energy of CaMnO3. Above 5% doping, it starts decreasing the conductivity. The Debye temperature (θD) also decreases fro…
Thin films of Lanthanum doped Bismuth Titanate (Bi3.25La0.75Ti3O12) (BLT) have been prepared and characterized for their applications in ferroelectric random access memory (FeRAM) devices. The films have been characterized via X-ray diffraction (XRD), atomic force microscopy (AFM), capacitance-voltage (C-V), ferroelec…
Polycrystalline Ba5HoTi3V7O30 compound has been prepared by solid-state reaction technique. Compound is found to be single phase by XRD studies. SEM study indicates average grain size to be ∼3 μm. Dielectric studies carried out in temperature regime RT-773 K and frequency range 1 Hz-100 kHz, show ferroelectric phase t…
Semiconductor glasses are the basic components of the integrated circuit and are responsible for the starting rapid growth of the electronic industry in the past fifty-to-sixty years worldwide. Bulk glasses of the Se80-xTe20Agx (x = 0, 5 and 10) system are prepared by the conventional melt quenching technique. Thin fi…
Substituted Li-ferrites are attractive materials for research due to their important properties like high Curie temperature leading to high thermal stability, high and wide range of saturation magn...
We report the formation of nanostructure Pb(Zr0.53Ti0.47)O3 (PZT) ceramic powder having cubic crystal structure under ambient conditions that has been found to be stable up to 800°C. The cubic structure of nanocrystalline PZT under normal condition is attributed to the crystallite size effect. The crystallite size eff…
Disinfection is the most essential and final treatment \ngiven to drinking water to render the water free from harmful pathogens. The most conventional and common form of \ndisinfection involves the use of strong oxidants that have the potential to produce undesirable disinfection by-products (DBP). Therefore,…
Nanosized Ce1-xDyxO2-x/2 (DDC, x = 0.05—0.25 mol%) were synthesized by combustion routes induced by microwaves (MS) and compared with the same composition prepared by conventional (CS) method. The conventional and microwave sintering routes were also used to consolidate the pellets. The samples were characterized by X…
Thin films of Bi1.5Zn1.0Nb1.5O7 (c-BZN) were deposited at ambient temperature on fused silica substrates by pulsed laser deposition (PLD) followed by a post deposition annealing at a temperature between 200–800°C. The post deposition annealing resulted in the formation of crystalline c-BZN thin films from the as depos…
Usualmente, um dos processos mais utilizados para fabricação de componentes em termoplásticos estruturais é a moldagem por compressão a quente, porém restringindo-se na obtenção de peças de pequeno e médio porte. Tal restrição deve-se à limitação do tamanho das prensas utilizadas, principalmente pelo custo envolvido.…
Due to their special properties, left-handed metamaterials have important potential applications in engineering. When an incident wave propagates through a periodic material with the dimension of its microstructure much smaller than the wavelength, the metamaterial can be regarded as a homogeneous medium, and its effe…
The effect of Ti on the magnetic, power loss and structural properties of Li0.35+x/2Zn0.3Mn0.05TixFe2.30–1.5xO4 ferrites (x = 0.0 to 0.25 in step of 0.05) + 0.5 wt% Bi2O3, prepared by standard ceramic technique, has been investigated. Phase formation of all samples has been confirmed by XRD. The magnetic properties ha…
The resolution of racemic conglomerates by crystallization methods is often prevented by the formation of epitaxial racemic conglomerates. These laminar crystals composed of alternating layers of opposite enantiomers are formed by the interplay between mass transport and surface kinetics involving normal and epitaxial…
Lead-free ceramic samples of [(Na1-xKx)1/2Bi1/2Ti O3] (NKBT) (x = 0.1, 0.15, 0.2, 0.3, 0.45) were prepared by double sintering method and the impedance measurements were carried out in the frequency range of 100 Hz–1 MHz. The Cole–Cole plot show depressed semicircular arcs with spur-like behavior indicate that the tem…