Materials Literature
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The structural and electronic properties of diamond and graphite were investigated by the first-principles total-energy pseudopotential method based on density functional theory. The band structure, DOS and PDOS were calculated. Results showed that diamond had a wide band gap, and its direct transition energy is 6.0 e…
Oxide heterointerfaces often trigger unusual electronic properties that are absent in respective bulks. Here, direct evidence is offered for spontaneously assembled local structural distortions in a single-phase bulk, which confine electrons to within an atomic layer with notable orbital reconstruction and coupling, c…
A novel procedure to direct the local synthesis of gold clusters on Fe(3)O(4) nanocrystals by means of alternating magnetic fields (AMFs) is demonstrated. This process allows growing gold selectively onto the heated magnetite surface, while keeping the synthesis solution comparatively cold. Sequential AMF cycles allow…
The synthesis of the first mesoporous silica (150 Å) anchored carbohydrate-derived chiral ketone is described. This new heterogeneous catalyst has been shown to be effective in the asymmetric epoxidation of olefins by oxone. The heterogeneous ketone catalyst has comparable activity to that of its homogeneous counterpa…
This project studies the dependence of the physical and chemical properties of powdered cellulose on their natural origin and conditions of preparation. We studied the effect of chemical composition and properties of the original native cellulose on the general characteristics of the powdered and microcrystalline cell…
Based on the in-depth study of traditional weft insertion apparatus, the electromagnetic technology was introduced into the textile machines. A new textile machine was researched whose shuttle was moved by the electromagnetic force. The electromagnetic force was generated by electromagnetic coil. The electromagnetic s…
Article history: Received on: 18/10/2012 The distribution of Chlorophyceae (Green algae) in relation to seasonal variation of paddy fields at Lalgutwa area, Ranchi has been under taken for the first time in this area. A regular seasonal collection has been made during several field trips in year 2010 to 2011. Total 24…
Here we report on a novel scheme for spectral analysis that exploits the wavelength dependence of the time-of-flight of a photon in a dispersive medium. This versatile and cost-effective method, named time-of-flight photon spectroscopy (TOFPS), has the major advantage of being compatible with time-correlated single-ph…
Acetylated cellulose and wood cellulose as well as untreated cellulose polyethylene blends were subjected to kinetic studies using water, 0.5 M NaOH, and 0.5 M HCl solutions in order to investigate their absorbent properties at 0.5/1.0 cellulose/wood cellulose/polyethylene matrix. The results of the absorption studies…
In this article, we report the synthesis of silver nanospheres (Ag NS) by a simple microwave irradiation method using Triton X 100 (TX 100) as a capping agent. TX 100 was also observed to act as a reducing agent in the presence of microwave radiation. From the ultraviolet-visible spectrum, the formation of Ag NS was c…
We prepared and investigated the thermoelectric properties of Cu 0.4 InTe 2 at 310–710 K. The crystal structure of Cu 0.4 InTe 2 was identical to that of CuIn 3 Te 5 , namely a tetragonal structure, space group P 4̄2 c , known as an ordered defect chalcopyrite. This structure is different from that of CuInTe 2 , which…
Research on the use of natural fibers as replacement to man-made fibre in fiber reinforced composites have received more interest and opened up further industrial possibilities. Natural fibre presents many advantages compared to synthetic fibers which make them attractive as reinforcements in composite material. They…
The asymmetric unit of the title compound, [Cd2Na2(N3)2(C44H28N4)2(C12H24O6)2], consists of one half of the dimeric complex; the tetra-nuclear mol-ecule lies about an inversion centre. The Cd(II) atom is coordinated by the four pyrrole N atoms of the 5,10,15,20-tetra-phenyl-porphyrinate ligand and one N atom of the ax…
Cationic phosphorus-containing dendrimers (CPDs) are a class of highly-branched polymers with potential medical relevance. However, little is known about CPD modes of interactions with cell and its components, including DNA. In the present work we investigated cytotoxicity and genotoxicity of CPDs generation 3 and 4 (…
Coarsening the resolution of a 3D reconstruction is a common approach to make simulations feasible with regard to computational resources. We coarsen the reconstruction of a PEMFC cathode catalyst layer and investigate how this influences parameters such as diffusivity and conductivity. This is also an indication of h…
Abstract A series of new hexafluoroisopropylidene, isopropylidene, carbonyl, and ether moieties substituted polyamides have been prepared from aromatic diamines and various moieties substituted aromatic dianhydrides. The synthesized polyamides were readily soluble in polar solvents such as N ‐methyl‐2‐pyrrolidone, N ,…
Abstract Three new nickel‐substituted Keggin‐type polyoxometalates functionalized by carboxylate derivatives were characterized. In the monomeric tetranuclear complex Na 1.5 K 2.5 [Ni(H 2 O) 6 ] 0.5 [(SiW 9 O 34 )(OH) 3 Ni 4 (C 6 H 13 NO 2 ) 3 ] · 17H 2 O ( 1 ), three dimethylaminobutyrate amino acids are connected to…
We present Monte Carlo simulations for a classical antiferromagnetic Heisenberg model with both nearest (${J}_{1}$) and next-nearest (${J}_{2}$) exchange couplings on the square lattice in the presence of nonmagnetic impurities. We show that the order-by-disorder entropy selection, associated with the Ising-like phase…
Resistivity and magnetic susceptibility measurements under external pressure were performed on NaFe 1− x Co x As ( x = 0, 0.01, 0.028, 0.075 and 0.109) single crystals. For both underdoped and optimally doped NaFe 1− x Co x As, the maximum T c reached as high as 31 K under certain pressures. Meanwhile the overdoped sa…
Abstract Piezoelectric ceramics system of Pb((Zn 1/3 Nb 2/3 ) 0.20 –(Zr 0.50 Ti 0.50 ) 0.80 )O 3 (0.2PZN–0.8PZT) was prepared by the conventional oxide mixing method. The dependences of the internal‐bias field and electric properties on the sintering temperature were investigated systematically. The results indicated…