Materials Literature
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The inhibition effect of 2-carboxymethylthio-4-(p-methoxyphenyl)-6-oxo-1,6-dihy-dropyrimidine-5-carbonitrile (CPD) towards the corrosion of copper was studied in aerated stagnant 3.5% NaCl at 25 °C using ac techniques include electrochemical frequency modulation and electrochemical impedance spectroscopy as well as po…
Naturally occurring foam constituent and surfactant proteins with intriguing structures and functions are now being identified from a variety of biological sources. The ranaspumins from tropical frog foam nests comprise a range of proteins with a mixture of surfactant, carbohydrate binding and antimicrobial activities…
The high reset current IR in unipolar resistance switching now poses major obstacles to practical applications in memory devices. In particular, the first IR-value after the forming process is so high that the capacitors sometimes do not exhibit reliable unipolar resistance switching. We found that the compliance curr…
We report on early stages of submonolayer Ag island coarsening on Ag(111) surface at room temperature ($300$ K) carried out using realistic kinetic Monte Carlo (KMC) simulations. We find that during early stages, coarsening proceeds as a sequence of selected island sizes creating peaks and valleys in the island size d…
There is an increasing commercial demand for nanoparticles due to their wide applicability in various areas such as electronics, catalysis, chemistry, energy and medicine. Metallic nanoparticles are traditionally synthesized by wet chemical techniques, where the chemicals used are quite often toxic and flammable. In t…
The purpose of this study is to investigate the morphology of solidification microstructures 80% Cu-20%Sn on different solidification rate. The commercial pure copper and tin were melted in crucible furnace at temperature 1000oC. The molten metal was casted in permanent moulds which have variation temperature, i.e. 35…
A series of Fréchet-type dendrimers with 9-benzyloxymethylanthracene cores were synthesized and characterized. The chiral source for the dendrimers was an (S)-2-methyl-1-butoxy group in the 3-position of the benzene ring. Irradiation at 366 nm of a dilute benzene solution led to the formation of two diastereomers (1:1…
The stabilities and atomic geometries of the graphene adatom and its dimer are studied using first-principles calculations based on the spin-polarized density functional theory. In the most stable structure, the adatom is located above the bond-center site. We also find a metastable structure whose symmetry is D 3 h a…
Abstract In this work, a two phase crystallization model based on the extension of the Kolmogoroff approach was proposed and verified by comparison with experimental isothermal and nonisothermal crystallization data of Syndiotactic Polystyrene (sPS) in a very wide range of cooling rates, up to 600 °C/s. To investigate…
Nanotechnology is expected to contribute to the therapeutic delivery field in the coming decade. Although the US FDA has multiple guidance documents in place to deal with novel drug products, nanoparticles may produce issues that have not been previously encountered with small drug molecules. This regulatory focus hig…
Abstract Nonwoven organic–inorganic fiber mats of poly(methyl methacrylate)‐ graft ‐poly(dimethyl siloxane) copolymers with various PDMS contents were produced by the electrospinning process. The average fiber diameter increased from 0.7 to 3 μm with increasing PDMS content. The fiber mats were used in the preparation…
Sorting the integers 1 through N into an ordered list is a simple task that can be done rapidly. However, using an algorithm based on the thermally activated pairwise exchanges of neighboring list elements, we find sorting can display many features of a glass, even for lists as small as N=5. This includes memory and r…
A quasiperiodic intermediate-valence system was prepared by applying pressure to an icosahedral Cd-Yb quasicrystal. In this system, each quasiperiodic lattice point has a charge degree of freedom. $\text{Yb}\text{ }{L}_{\text{III}}$ x-ray absorption spectroscopy experiments demonstrate that the Yb valence increases co…
The macroscopic nonlinear optical response of the "push-pull" chromophore RuPZn incorporated into a single monolayer of the amphiphilic 4-helix bundle peptide (AP0) covalently attached to a solid substrate at high in-plane density has been measured. The second-order susceptibility, chi(zzz), was found to be in the ran…
We report here the observation of field-induced jump in resistivity in Ga-doped Ni-Mn-Sn shape memory alloy (${\text{Ni}}_{2}{\text{Mn}}_{1.36}{\text{Sn}}_{0.64\ensuremath{-}x}{\text{Ga}}_{x}$, $x=0.32$ and 0.36). The samples order ferromagnetically at around 330 K and undergo martensitic transition near room temperat…
A novel A-site ordered perovskite CaCu(3)Pt(4)O(12) was synthesized under high pressure and high temperature of 12 GPa and 1250 degrees C. CaCu(3)Pt(4)O(12) is the first perovskite in which the B site is fully occupied by Pt(4+). The crystal structure refinement based on the synchrotron powder X-ray diffraction data s…
We have grown undoped Mg x Zn 1- x O films on Zn-polar ZnO substrates by using a plasma-assisted molecular beam epitaxy technique. The residual donor concentration ( N D ) was evaluated by capacitance–voltage measurements of the Schottky junctions formed using poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate)…
In 1957, P. Haasen and A. Kelly presented an account of experiments that showed that, in Al and Ni single crystals, the mere act of unloading during a tensile test caused a small but reproducible transient increase in flow stress, a ‘yield point’. The increase is proportional to the current work-hardened stress level.…
Zinc Sulfide nanoparticles were prepared by chemical rout i.e. co-precipitation method. X-ray diffraction profiles of ZnS have been conformed as single phase with hexagonal structure. And crystalline in nature. The lattice parameters of prepared material is a= 3.8314A0 c=6.2431A0 with space group P63mc. The particle s…
We performed 77 Se NMR mesurements to investigate the electronic properties of the two dimensional BETS layers of the organic superconductor, λ-(BETS) 2 GaCl 4 , which is isostructural with the field induced superconductor, λ-(BETS) 2 FeCl 4 . The broadening of NMR spectrum at low temperatures was confirmed to be due…