Materials Literature
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Nanocomposite HfN x -BN thin films are deposited by chemical vapor deposition at substrate temperatures of 350−800 °C using the single-source precursor hafnium borohydride, Hf(BH 4 ) 4, in combination with ammonia, NH 3 . Below 350 °C, the product is metallic HfB 2 with essentially no incorporation of nitrogen. Howeve…
This contribution investigates the electronic difference of dibutylamino/dibutylammonium and phenol/phenolate groups in four simple distyrylbenzenes and bisarylethynylbenzenes. The compounds and their protonated and deprotonated species, respectively, were investigated by UV-vis and emission spectroscopies. While the…
A novel layered indate-germanate InGe(2)O(5)F(dap) x 2 H(2)O (1, dap = 1,2-diaminopropane) has been hydrothermally synthesized and structurally characterized. Its structure consists of Ge(4)O(10)F(2) clusters and In(2)O(6) dimers, which are interconnected to form 4- and 6-ring layers. 1 displays luminescent emission a…
Abstract In this article, experimental and simulated results are presented for the evolution of the copolymer composition as unsaturations are consumed in the free‐radical cross‐linking copolymerization of Styrene(St) and BisphenolA glycerolate dimethacrylate (BDMA). Real time FTIR measurements were performed to monit…
The hydrodynamical equations and the notion of a frequency dependent complex specific heat near the critical point of binary liquids are used to obtain an expression for the low-frequency bulk viscosity. In this way the interrelations between different theoretical models, treating the critical sound attenuation from e…
Advanced diesel combustion regimes such as High Efficiency Clean Combustion (HECC) offer the benefits of reduced engine out NOx and particulate matter (PM) emissions. Lower PM emissions during advanced combustion reduce the demand on diesel particulate filters (DPFs) and can, thereby, reduce the fuel penalty associate…
Abstract Novel thermosetting monomers possessing both maleimide and propargyl groups were first designed and synthesized. The monomers included N‐(2‐propargyloxyphenyl) maleimide (2‐PPM), N‐(3‐propargyloxyphenyl) maleimide (3‐PPM), and N‐(4‐propargyloxyphenyl) maleimide (4‐PPM), and their structures were confirmed wit…
In order to measure the concentration of exhaust a mobile analyzer SEMTECH DS by SENSORS Inc and particle matter by TSI was used. In the study the results of the vehicle emission tests in the road conditions were presented as this was the only way to obtain the information on real vehicle emissions. They include infor…
Inspired by the experience in CuO-based superconductor that larger spacing distance between CuO planes induced higher superconductivity transition temperature $({T}_{C})$, some researchers synthesized $({\text{Sr}}_{2}{\text{ScO}}_{3}{)}_{2}{\text{Fe}}_{2}{\text{As}}_{2}$ and $({\text{Sr}}_{2}{\text{VO}}_{3}{)}_{2}{\t…
Microscopic photoluminescence was applied to investigate μ m-order inhomogeneity of InGaN alloys. Samples had InGaN/GaN multiple-quantum-well structures grown on sapphire substrates at various temperatures, and luminescence was adjusted to be green. Luminescence morphologies of dendritic appearance were observed on as…
Molecular dynamics simulation with an experimental work was performed on the TiO 2 nanostructure film. The Morse potential function was used for the interatomic interactions. Then, the equations of motion for molecules and atoms are solved by Verlet algorithm. The effects of deposition rate and the number of TiO 2 mol…
Abstract We investigate the effect of surface Ga accumulation on the growth of GaN by molecular beam epitaxy (MBE) with ammonia as a nitrogen source. Control of the surface Ga condition is very important because the crystallization process strongly depends on the surface Ga coverage. The growth rate rapidly decreases…
Lean burn natural gas engines have high potential in terms of efficiency and NOx emissions in comparison with stoichiometric natural gas engines, and much lower particulate emissions than diesel engines. They are a promising solution to meet the increasingly stringent exhaust emission targets for both light and heavy-…
The capability of theoretical durability studies to offer an efficient alternative methodology for predicting the potential performance of catalysts has improved in recent years. In this regard, multi-scale theoretical methods for predicting sintering behavior of Pt on various catalyst supports are being developed. Va…
Abstract We studied InN (0001) grown by plasma assisted molecular beam epitaxy (PAMBE) with high‐resolution electron energy‐loss spectroscopy (HREELS) after vacuum transfer thus avoiding any further surface preparation. We were able to detect for the first time besides the Fuchs‐Kliewer surface phonon ω0 two plasmaron…
erenkov radiation with the emission cone reversed has been observed in a metamaterial with negative refractive index.
Abstract α,ω‐di(iodo) poly(isobornyl acrylate) macroiniators (α,ω‐di(iodo)PIA) with number average molecular weight from Mn,TriSEC = 11,456 to Mn,TriSEC = 94,361 were synthesized by single electron transfer‐degenerative chain transfer mediated living radical polymerization (SET‐DTLRP) of isobornyl acrylate (IA) initia…
The effects of different ethanol-diesel blended fuels on the performance and emissions of a single cylinder engine have been experimentally evaluated and compared in this study. Several diesel blends containing up to 20% ethanol have been operated on the IC engine and compared with the pure diesel fuel. The regulated…
A low swirl, low compression ratio engine with narrow fuel spray angle injector was used to investigate the cylinder wall wetting process of early direct injection strategies. A methodology was developed in order to detect liquid fuel impingement on the cylinder wall oil film. First, single injection tests were perfor…
Optimal control theory is applied for designing pulse sequences to optimally excite a spin-3/2 system with residual quadrupolar coupling in the presence of quadrupolar relaxation. A homogeneous form of the master equation is constructed to simulate the dynamics of the spin system, and a general optimization procedure…