Materials Literature
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We report the magnetotransport properties of large area graphene on stretchable polyethylene terephthalate substrates. At 2 K, weak localization of electrons introduced negative magnetoresistance at low field; a transition to positive magnetoresistance followed as the external field increases. Our results suggest that…
Nanocrystalline hydrotalcite derived mixed oxides containing magnesium, cobalt, and aluminum (MCAM) (M (1− x ) Al x O (1+ x /2) ; M = Mg or Co/Mg and Co and x = molar ratios) have been synthesized successfully and showed reversible hydrogen storage capacity at near ambient condition using fixed bed. ICP-MS and XRD ana…
A comprehensive magnetic study has been carried out on the two sets of La0.5Sr0.5CoO3 samples with a view to understand the origin of low temperature glassiness in the ferromagnetic state. The samples prepared by the conventional solid-state synthesis method show a low temperature shoulder in both dc magnetization as…
The new method RAMM (random-model-based method) has been developed and implemented in the EXPO computing program for improving the ab initio crystal structure solution process. When the available information consists of only the experimental powder diffraction pattern and the chemical formula of the compound under stu…
Abstract The crosslinked polyvinyl alcohol (CPVA) and alkyl chain grafted CPVA (CPVA‐ g ‐BGE) were prepared through the addition reaction of epoxy group of epichlorohydrin and butyl glycidyl ether (BGE) with the hydroxyl group of PVA. By FTIR and 1 HNMR analysis, BGE was confirmed to be grafted onto the molecular chai…
Novel hybrid SiO2-coated CdTe quantum dots (QDs) were created using CdTe QDs coated with a hybrid SiO2 shell containing Cd(2+) ions and a sulfur source via a sol-gel process in aqueous solution. Aqueous CdTe QDs with tunable emitting color created through a reaction between cadmium chloride and sodium hydrogen telluri…
We observed the coulomb blockade phenomena in ferromagnetic contacting single wall semiconducting carbon nanotube devices. No obvious Coulomb peaks shift was observed with existing only the Zeeman splitting at 4 K. Combining with other effects, the ferromagnetic leads prevent the orbital spin states splitting with mag…
We have investigated the effect of uniaxial pressure (P) on electrical resistivity along the ab plane and c axis in a single crystal of Sm0.55(Sr0.5Ca0.5)0.45MnO3. A huge piezoresistance (PR ∼107% at P = 90 MPa) and a remarkable increase (at the rate of ∼79 K/GPa) of metal-insulator transition temperature (TMI) have b…
As a precursor of carboxyl-functionalized task-specific ionic liquids (TSILs) for f-element separations, (pyrazol-1-yl)acetic acid (L) can be deprotonated as a functionalized pyrazolate anion to coordinate with hard metal cations. However, the coordination chemistry of L with f-elements remains unexplored. We reacted…
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Abstract Local plasma oxidation of silicon in combination with wet chemical etching provides a method for high accuracy computer controlled surface modification and machining. In this paper we use a microwave powered atmospheric pressure Ar/He/O 2 plasma jet for the local oxidation with a typical tool function width o…
In spite of their attractive features, widespread biomedical applications of CS nanoparticles are yet to be realized due to their poor stability in physiological conditions, such as in buffer system at pH 7.4. Buffer-stable chitosan-based hybrid NPs (HNPs) are reported and characterized. Buffer stability is achieved b…
A broadband, low-loss, isotropic, high refractive index metamaterial comprising an array of close-packed cubic elements of cross-linked square metal plates is demonstrated in the microwave regime. The structuring of the cubic elements reduces the diamagnetic response exhibited by arrays of solid metal cubes, whilst ma…
Two series of cholesteryl p-(ω-bromoalkyloxy)benzoates and dimeric compounds of cholesteryl benzoate were synthesised, and their transition properties were studied. These compounds exhibited cholesteric phase during wide temperature range. The dimeric compounds showed the odd–even effect of the transition temperature,…
We report ${}^{31}$P- and ${}^{75}$As-NMR studies on (Ca${}_{4}$Al${}_{2}$O${}_{6}$)Fe${}_{2}$(As${}_{1\ensuremath{-}x}$P${}_{x}$)${}_{2}$ with an isovalent substitution of P for As. We present the novel evolution of emergent phases that the nodeless superconductivity (SC) in $0\ensuremath{\le}x\ensuremath{\le}0.4$ an…
Our neutron diffraction investigation of PrMn${}_{2}$Ge${}_{2\ensuremath{-}x}$Si${}_{x}$ reveals a clear separation into two magnetic phases, canted ferromagnetic (Fmc) and antiferromagnetic (AFmc), between $x$ $=$ 1.0 and 1.2 and a commensurate phase gap in the lattice, due to magnetostrictive distortion. This remark…
This article discusses the development of a high-rate shape memory alloy–driven actuator. The concept of the actuator was developed to act as aerodynamic load control surface on wind turbines. It was designed as a plate or beam-like structure with prestrained shape memory alloy wires embedded off its neutral axis. Mor…
Abstract Composites of poly(ethylene terephthalate) ( PET ) with ionic liquid ( IL ) as matrix were prepared by in situ polycondensation. XRD and DSC were performed to probe crystal structures and determine the crystallization kinetics during crystallization. ILs could serve as nucleating agents in accelerating the cr…
A series of microcellular poly (phenylene sulfide) (PPS) foams were prepared by Mucell injection molding. The cell structure, mechanical properties, crystallization behavior and dielectric property of microcellular PPS foams were systemically investigated. The results showed that the longer the length of flow passage…
The control of vapor condensation processes by suitably prepared surfaces is a prominent research area with important applications in the industry. For example, it is well known that the efficiency of condensation heat exchangers can be significantly increased when the vapor condenses to form droplets on the surface,…