Materials Literature
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Polycrystalline ceramics samples having compositional formula PbZr0.588Ti0.392Fe0.01Nb0.01O3 and Pb0.98Sm0.02Zr0.588Ti0.392Fe0.01Nb0.01O3 were prepared by traditional solid state route. Sintering was carried out at 1250°C in closed alumina crucibles in lead rich atmosphere. XRD analysis confirmed formation of tetragon…
Structural, dielectric and transport properties of single phase Sr(B′1/3Nb2/3)O3 where (B′ = Mg2+, Co2+, Cu2+) relaxor ferroelectric compounds synthesized by standard solid state reaction technique, are reported here. All the samples exhibit strong correlation between structure, dielectric and transport behavior. In t…
Multiferroics have been known as materials exhibiting both ferroelectric and ferromagnetic properties in same phase, they have interesting physical properties as well as possibility of practical application in some new memories, spintronics and sensor devices. One of the interesting multiferroic material is BiFeO3 whi…
Nanocompósitos de poliamida 6/argila organofílica foram preparados pelo método de intercalação por fusão. A argila foi tratada com o sal quaternário de amônio (Cetremide) visando-se à obtenção da argila organofílica (OMMT). Esta foi caracterizada por fluorescência de raio X (FRX), Espectroscopia no Infravermelho (FTIR…
Hybrid solar cells have attracted considerable attention in recent years due to their high thermal and chemical stability, light weight, high carrier mobility, and low cost. The active layer of cadmium selenide (CdSe) nanoparticles- poly(3-hexylthiophene) (P3HT) is optimized in terms of their mass ratio and microstruc…
The nanocomposites of NiCuZnFe2O4-SiO2 were prepared using Microwave-Hydrothermal method at 160°C/45 min.The as-synthesized powders were characterized using X-ray diffraction and Transmission Electron Microscope (TEM).The average particle size of the powders were found to be ∼20 nm.The powders were densified at 900°C/…
Lead Zirconate Titanate [Pb(Zr,Ti)O3, PZT] thin films have been extensively studied due to their possible applications in ferroelectric and piezoelectric devices. This work deals with the synthesis and characterization of ultra thin PZT films of thickness ∼100 nm deposited on Si/SiO2/TiO2/Pt(111) by RF Magnetron Sputt…
The application of intense ultrasound to a liquid-gas interface results in the formation of an ultrasonic fountain and generates both mist and vapor from the liquid. Here, the composition of the vapor and aerosol above an ultrasonic fountain is determined as a function of irradiation time and compared with the results…
The influence of magnetic ripple on ion collisional transport in ITER (Shimada et al 2007 Progress in the ITER Physics Basis: chapter 1. Overview and summary Nucl. Fusion 47 S1 ) is calculated using the Monte Carlo orbit code ISDEP (Castejón et al 2007 Plasma Phys. Control. Fusion 49 753 ). The ripple is introduced as…
Longitudinal and transverse relaxation times of multicomponent nanoparticle (NP) chains are investigated for their potential use as multifunctional imaging agents in magnetic resonance imaging (MRI). Gold NPs (ca. 5 nm) are arranged linearly along double-stranded DNA, creating gold NP chains. After cutting gold NP cha…
The crystal structures of bis[2-(1-alkyl-pyridinium-4-yl)vinyl]benzenes and their unusual structure-luminescence dependence are reported and discussed. It has been found that luminescence of viologen analogues can be activated by tuning their molecular and crystal structure (via modification of the N-alkyl substituent…
The hexokinase isoenzyme 2 of Saccharomyces cerevisiae (ScHxk2) represents an archetype of a two-domain protein with the active site located in a cleft between the two domains. Binding of the substrate glucose results in a rigid body movement of the two domains leading to a cleft closure of the active site. Both domai…
A high piezoelectric transition temperature is indicated for present orthorhombic samples of lead meta-niobate (PbNb2O6) by the high value of the temperature (Tm) at which the real part (ϵ′) of electrical permittivity peaks. It is 573 to 580°C. The imaginary component (ϵ″) increases sharply at these temperatures. Cool…
Nanoscale fabrication by intrinsic suppression of proximity-electron exposures and general considerations for easy and effective top-down fabrication
Coils of various shapes are used in various applications such as sensing and magnetic energy storage. Successful practical application of coils requires knowledge about their self-inductance, which is one of their fundamental properties. In the past, approximation analyses have been performed on coils of various shape…
Effect of zinc (Zn) dopant on the conductivity, catalytic activity and the interface matching of La0.6Sr0.4Co0.2Fe0.8O3-δ(LSCF) cathode materials with 8YSZ electrolyte were investigated for intermediate temperature solid oxide fuel cell's (IT-SOFC). XRD patterns of powders showed pure perovskite phase after being calc…
In this paper we report the study of the resistance anomaly close to the ferromagnetic phase transition temperature ${T}_{C}$ in Ni nanowires. The electrical resistance measurements on well characterized Ni nanowires of diameters down to 20 nm were carried out over an extensive temperature range (4--675 K), which enco…
Being materials with a large number of interesting properties, ferroelectric-ferrite based composites have recently been developed. People are showing a great interest in these materials due to some unique properties like magnetoelectric effect in addition to the ferroelectric, dielectric and magnetic properties. Afte…
The atomic structures of graphene islands on SiC(0001) surfaces are studied theoretically together with their growth mechanism. Two types of embedded graphene island structure are proposed. It is shown that these structures actually act as the graphene island electronically, and that those with zigzag edges have the m…
We present a new method for creating surface chemical patterns where three chemistries can be periodically arranged at alternate positions on a single substrate without the use of top-down approaches. High-resolution chemical imaging by time-of-flight secondary ion mass spectrometry (ToF-SIMS), with nanometer spatial…