Materials Literature
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The time-resolved fluorescence spectra as well as the decay kinetics for CdSxSe1−x single crystal nanobelts without and with the presence of structural disorders have been investigated by femtosecond time-resolved fluorescence spectrometer based on optical parametric fluorescence amplifier technique. The structural di…
Nanocomposites of surfactant-capped CdS quantum dots embedded in polystyrene thin film have been prepared and characterized by z-scan measurements. Large values of the two- and three-photon absorption coefficients were observed at 532nm (252cm∕GW) and 1064nm (160cm3∕GW2). The cross sections of absorption were ∼1×10−44…
Acute low back pain is a very common symptom. Up to 90% of all adults suffer at least once in their life from a low back pain episode, in the majority of cases a nonspecific lumbago. They are, with or without sciatica, usually self-limited and have no serious underlying pathology and subside in 80-90% of the concerned…
This study examines the properties of cellulosic fibrillar fines manufactured from different pulp raw materials, bleached softwood kraft (BSWK), thermomechanical pulp (TMP), and non-wood sisal. Chemical characterisation showed that the carbohydrate and lignin contents of sisal were between those of BSWK and TMP. Sisal…
Strain and vacancy clusters behavior of polycrystalline vanadium (V) and tungsten (W)-doped Ba[Zr0.10Ti0.90]O3, (BZT:2%V) and (BZT:2%W) ceramics obtained by the mixed oxide method was evaluated. Substitution of V and W reduces the distortion of octahedral clusters, decreasing the Raman modes. Electron paramagnetic res…
Abstract The presence of carbon nanostructures in evaporated carbon thin films has been evidenced by Raman spectroscopy measurements. The films were grown by means of a conventional electron beam evaporation equipment, used to sublimate a graphite target and by varying the substrate temperature T s from room temperatu…
Abstract In polymorph screening it is imperative to maximize the physicochemical diversity of solvents used in crystallization experiments. This is done in order to increase the probability of finding as many crystal forms of the compound as possible. When setting up a complete solid form screening scheme it is common…
Using the first-principles density functional calculations, we explored the magnetic properties of Fe–X (X=Os, Ir, and Pt) nanowires encapsulated in a (4,4) carbon nanotubes. It is found that these wires possess giant magnetic anisotropy energies due to sizable spin-orbit coupling along with induced magnetization of 5…
A new methodology has been established for identification of β-transus temperature in α + β and β titanium alloys by ultrasonic velocity measurements in a single specimen in one microstructural condition only. This methodology is based on a linear correlation obtained for the variation in β-transus temperature with ul…
Abstract The new cyclotriphosphazene derivative N 3 P 3 (OC 6 H 3 OCH 3 COH) 6 ( 1 ) was synthesized from hexachlorocyclotriphosphazene, N 3 P 3 Cl 6 , and 4‐hydroxy‐3‐methoxybenzaldehyde in acetonitrile in the presence of K 2 CO 3 . The structure of 1 was verified by means of elemental analysis, IR, 1 H NMR, 13 C NMR…
Abstract The crystal structures of six members of the homologous series with general formula [Bi QX ] 2 [Ag x Bi 1−x Q 2−2x X 2x−1 ] N+1 ( Q = S, Se; X = Cl, Br; 1/2 ≤ x ≤ 1) and N = 4, 5, or 7 were determined by single‐crystal X‐ray diffraction. The series are characterized by the parameters N and x and are denoted (…
Abstract A new organic templated lanthanum sulfate [C 4 N 3 H 16 ][La(SO 4 ) 3 (H 2 O)] ( 1 ) has been solvothermally synthesized by using n ‐butanol as solvent. The colorless block crystals were characterized by IR, TGA, ICP, and XRD. The structure was determined by single‐crystal X‐ray diffraction: Monoclinic, P 2 1…
A dihydroxotin(IV) porphyrin functionalized single-walled carbon nanotubes (SWNTs) nanohybrid is obtained. Solubility of the nanohybrid in organic solvents is determined by UV-Vis-NIR absorption spectroscopy. Electron absorption and fluorescence spectra investigations demonstrate that efficient electron transfer occur…
The remarkable etching reaction of single-walled carbon nanotubes (SWNTs) has been observed in their growth of the parameter-controlled plasma chemical vapor deposition (CVD). The time evolution study of the SWNTs growth leads to establishing a growth equation which can completely express the growth kinetics of SWNTs…
Abstract Polyaniline (PANi), as conductive polymer, constitutes an attractive material for electronic and optical applications. Different from electropolymerization and chemical oxidative polymerization, electroless deposition is another method for synthesizing PANi. Aniline can polymerize slowly and spontaneously on…
Abstract A facile and economic method to fabricate and immobilize silver nanoparticles on a thin Si wafer (AgNP/Si) is reported for an analytical template in ambient environment by surface‐enhanced infrared/Raman spectroscopy. The protocol involves immersion of the Si wafer in a solution containing silver nitrate and…
Durango apatite was irradiated with energetic U ions of 2.64 GeV and Kr ions of 2.1 GeV, with and without simultaneous exposure to a pressure of 10.5 GPa. Analysis by confocal Raman spectroscopy gives evidence of vibrational changes being marginal for fluences below 5×10 11 ions/cm 2 but becoming dominant when increas…
Band alignment of amorphous Ge2Sb2Te5 and various substrates was obtained using high-resolution x-ray photoelectron spectroscopy. The valence band offset of Ge2Sb2Te5 on various complementary-metal-oxide-semiconductor (CMOS) materials, i.e., Si, SiO2, HfO2, Si3N4 and NiSi, were investigated with the aid of the core le…
Based on causality, the limitation of the electromagnetic cloak with dispersive material is investigated in this letter. The results show that perfect invisibility cannot be achieved because of the dilemma that either the group velocity Vg diverges or a strong absorption is imposed on the cloaking material. It is an i…
Abstract This paper investigates the application of a recently proposed higher‐order Cauchy–Born rule in the continuum simulation and multiscale analysis of carbon nanotubes (CNTs). A mesh‐free computational framework is developed to implement the numerical computation of the hyper‐elastic constitutive model that is d…