Materials Literature
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A century ago, on the evening of 4 May 1912, three men dropped an envelope into the letterbox of the building of the Bayerische Akademie der Wissenschaften in Munich.They knew that the gentle thud was to be followed by a larger reverberation.They had hit two scientific jackpots.The envelope contained a preliminary rep…
Supercritical nitrile hydrolysis can be used for both, amide and acid production as well as waste water treatment, as the hydrolysis products show good biodegradability. The conventional process at ambient conditions requires large amounts of mineral acid or base. Approaches that use supercritical water as a green sol…
Using models simulating the environment of two distinct adsorption sites of $H_2$ in metal-organic framework-5 (MOF-5), binding energies of $H_2$ to MOF-5 were evaluated at the MP2 and CCSD(T) level. For organic linker section modeled as dilithium 1,4-benzenedicarboxylate ( $C_6H_4(COO)_2Li_2$ ), the MP2 and CCSD(T) b…
The interconnections between Large Hadron Collider (LHC) main dipole and quadrupole magnets are made of soldered joints of two superconducting cables stabilized by a copper bus bar. The 2008 incident revealed the possible presence of defects in the interconnections of the 13 kA circuits that could lead to unprotected…
PVA/silica hybrid xerogels were synthesized by sonohydrolysis of a mixture of 2-way catalyzed TEOS and water solution of PVA. PVA was successfully removed from the xerogels through calcination and its removal was confirmed through TGA analysis of the calcined gel. Microstructure of the gels was studied through SEM, XR…
Different treatment time and bias voltage with RF Ar plasma were used to improve tribological properties of NBR (Nitrile Butadiene Rubber). Chemical structure analyses of NBR by Attenuated Total Reflectance (ATR) were performed to clarify the functionality modification after the plasma treatment. In addition, wetting…
Indenter blunting is inevitable in nanoindentations and results in unexpected contact properties. Both relaxation of the indentation size effects and deepening of the substrate effects under a blunted indenter cause a change of the bathtub-shaped hardness with indentation depth in a soft film on hard substrate. Thus a…
The potential of superparamagnetic iron oxide nanoparticles (SPIONs) in various biomedical applications, including magnetic resonance imaging (MRI), sensing, and drug delivery, requires that their surface be derivatized to be hydrophilic and biocompatible. We report here the design and synthesis of a compact and water…
There is growing interest in life extensions to enable longer term operation (LTO) for both existing nuclear power plants (NPPs) and proposed new NPPs. In order to justify an initial license extension for the 40–60 yr period, new nondestructive examination (NDE) approaches have been developed and deployed by NPP opera…
Colloidal gels are intermediates in the production of highly porous particle systems. In the production process, the gels are fragmented after their creation. These gel fragments consolidate to particles whose application-technological properties are determined by their size and porosity. A model of the consolidation…
In this study, we have developed the method for obtaining a conductive DLC layer on glass substrate of 30×30mm size by adding Nitrogen or Silane gas during CVD(Chemical Vapor Deposition) growth. The growth rate and electrical conductivity were investigated under different plasma deposition condition. In addition, we m…
Abstract Free energy barriers are calculated using the modified centre of excess charge (mCEC) coordinate and the umbrella sampling formalism. Proton transport is described on propyl‐imidazole functionalised silicon dioxide surfaces by a quantum mechanical–molecular mechanical coupling (QM/MM) coupling approach, coupl…
For good performance of photonic devices whose working principle is based on the enhancement of electromagnetic fields obtained by confining light into dielectric resonators with dimensions in the nanometre length scale, a detailed knowledge of the optical mode structure becomes essential. However, this information is…
TiO 2 sol-gel thin films were deposited on glass substrates by dip coating method. Nanocrystalline TiO 2 thin films were prepared at 300°C. The effect of annealing temperature on optical properties of nanocrystalline TiO 2 thin films was studied. The films were characterized by different techniques: XRD, UV-visible sp…
A new Sommerfeld integral path is proposed for a dielectric slab with double negative metamaterials. In order to conceive the proper Sommerfeld integral path, the mode properties of a grounded dielectric slab with double negative metamaterials are first reviewed. Dispersion diagrams and power flows are investigated, f…
Honeycomb-patterned polyvinypyrrolidone (PVP) thin films coated with nanometer-sized silver particles were prepared using honeycomb-patterned polystyrene (PS) template films fabricated by casting a polystyrene solution under humid condition. Silver was first metallized on the patterned PS films via silver nitrate ( $A…
Abstract Einzeltropfenmesszellen ermöglichen die Untersuchung von verfahrenstechnischen Prozessen bei einem minimalen Einsatz von Material, Zeit und Kosten. Die akustische Levitation erlaubt eine kontaktlose Positionierung von Flüssigkeiten, Gasen und Feststoffen. Es wird die erfolgreiche Implementierung eines akustis…
A hard film coat can improve a tool's performance. In this study, the frictional properties of an uncoated tool and a coated tool with TiN were measured against that of SCM440 (42 CrMo 4) steel. The results showed there was no significant difference between the friction coefficient of the high-speed steel tool and the…
School of Chemical Sciences, University of Illinois, Urbana, IL 61801, USAReceived September 1, 2011, Accepted October 9, 2011Key Words : Enantiomer separation, Chiral self-recognition, Chiral stationary phasePioneering work in the design of brush-type chiralstationary phases (CSPs) using chiral recognition rationales…
El presente trabajo evaluó en laboratorio, la resistencia mecánica bajo carga monotónica, el módulo resiliente y la resistencia a la deformación permanente que experimenta una mezcla asfáltica cuando se modifica con un desecho de policloruro de vinilo (PVC) por vía húmeda. Adicionalmente, fue evaluada durante 21 meses…