Materials Literature
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A partially melted pelitic xenolith, Wehr volcano, East Eifel, Germany, contains staurolite porphyroblasts pseudomorphed by a hercynite-rich assemblage that includes ferrogedrite, sillimanite-mullite ss , quartz and siliceous, peraluminous glass, which can be schematically represented by the reaction, staurolite → her…
Aggregation in nondiffusion limited colloidal particle suspensions follows a temporal power-law dependence that is consistent with classical diffusion limited cluster aggregation models; however, the dynamic scaling exponents observed in these systems are not adequately described by diffusion limited cluster aggregati…
Accurate and fast estimation of VLSI interconnect thermal profiles has become critically important to estimate their impact on circuit/system performance and reliability, which is necessary for reducing product development time and achieving first-pass silicon success. Present commercial thermal analysis tools are inc…
In contrast to almost all anisotropic superconductors, the upper critical field of ${\text{URu}}_{2}{\text{Si}}_{2}$ is larger when the field is oriented along the less conducting direction. We present a study of resistivity and Seebeck coefficient extended down to sub-Kelvin temperature range uncovering a singular ca…
The nine CRC fuels for advanced combustion engines (FACE fuels) have been evaluated in a simple, premixed HCCI engine under varying conditions of fuel rate, air-fuel ratio, and intake temperature. Engine performance was found to vary mainly as a function of combustion phasing as affected by fuel cetane and engine cont…
Sputter codeposition of platinum and tantalum is used to generate catalyst libraries of Pt 1− x Ta x with 0.05< x <0.9. Extensive characterization of the libraries by high-energy X-ray diffraction reveals the presence of several ordered intermetallic phases as a function of composition and deposition conditions. Asses…
Soot formation and oxidation are complex and competing processes during diesel combustion. The balance between the two processes and their history determines engine-out soot values. Besides the efforts to lower soot formation with measures to influence the flame lift-off distance for example or to use HCCI-combustion,…
Abstract This study deals with the degradation of polyethylene terephthalate (PET) waste through aminolysis with various amines. All of these degradation experiments were carried out at ambient temperature and at normal pressure. Although PET is known to be recycled in many ways, but still there is a need of developme…
We present postdeposition annealing experiments on undoped amorphous-/n-type crystalline silicon [(i)a-Si:H/(n)c-Si/(i)a-Si:H] heterostructures used as precursors for a-Si:H/c-Si high-efficiency solar cells. Comparing conventional hotplate-heating with pulsed microwave-heating we obtain excellent interface passivation…
Tissue engineering of the small intestine remains experimental despite worldwide attempts to develop a functional substitute for short bowel syndrome. Most published studies have reported predominant use of PLLA (poly-L-lactide acid)/PGA (polyglycolic acid) copolymer as the scaffold material, and studies have been lim…
The feasibility of using ultrasound to modulate fluorescence in a turbid medium is still in debate due to the difficulty of detecting the modulated signal. We have demonstrated a system that could detect the weak signals of ultrasound-modulated fluorescence (UMF) by using a broadband lock-in amplifier and microbubbles…
The surface-confined coupling reaction between melamine (1,3,5-triazine-2,4,6-triamine) and 1,4-phenylene diisocyanate has been investigated on Au(111) by scanning tunneling microscopy. Diisocyanate species are stabilized at the edges of melamine arrays and coupling reactions to form small urea oligomers may be initia…
The engineering of soft functional materials based on the construction of three-dimensional interconnecting self-organized nanofiber networks is reported. The system under investigation is an organogel formed by N-lauroyl-L-glutamic acid di-n-butylamide (GP-1) in propylene glycol. The engineering of soft functional ma…
A facile palladium-catalyzed procedure for meta-selective alkylation of perylene bisimides with alkyl halides has been achieved by direct C-H functionalization.
Fuels derived from biomass will most likely contain oxygen due to the high amount of hydrogen needed to remove oxygen in the production process. Today, alcohol fuels (e. g. ethanol) are well understood for spark ignition engines. The Institute for Combustion Engines at RWTH Aachen University carried out a fuel investi…
The hydrothermal reactions of KCl, RbCl, CsOH, and CsCl with phosphonoacetic acid and uranium trioxide at 180 degrees C for three to five days results in the formation of five different crystalline uranyl carboxyphosphonates, K[(UO(2))(2)(PO(3)CH(2)CO(2))(PO(3)CH(2)CO(2)H)(H(2)O)] x H(2)O, Rb[(UO(2))(2)(PO(3)CH(2)CO(2…
A new s-triazine-based C(3) building block, endowed with three phosphonate groups, has been prepared in a simple two-step synthesis starting from p-bromomethylbenzonitrile; the new building block easily undergoes further olefination reactions to afford in a straightforward manner tris(tetrathiafulvalene)- and tris(fer…
This study reports the development of a simple, sensitive, and selective-detection system for homocysteine (HCys) based on the combination of fluorosurfactant-capped gold nanoparticles (FSN-AuNPs) and o-Phthaldialdehyde (OPA). The proposed assay utilizes FSN-AuNPs as extractors for HCys and cysteine (Cys), which can t…
Three injectors with different nozzle geometries were tested in a multicylinder diesel engine with a high-pressure common-rail injection system. Various injection pressures were tested along with exhaust gas recirculation to achieve low NOx and soot emissions. The injectors used in the study included a six-hole nozzle…
LiGe 2 (PO 4 ) 3 (LGP) with a NASICON structure is synthesized through the solid state method. Well-crystallized LGP obtained at 900 °C shows a total lithium (Li) ion conductivity of 7.2 × 10 −7 S/cm. For the first time, the Li reversible capability of bulk LGP is measured to be 460 mAh/g at a charge rate of 150 mA/g…