Materials Literature
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Upconversion spectra of Er/Tm codoped NaY(WO(4))(2) crystal excited by 974nm laser is investigated. Intensive 520nm/550nm and 800nm emissions are observed. Three-photon process at high pumping power is presented in the green upconversion. A model is proposed that the three-photon process is actualized by the energy in…
Energy migration in self-assembled, water soluble, quantum dot (QD) nanoclusters is reported. These spherical nanoclusters are composed of CdSe QDs bound together by pepsin, a digestive enzyme found in mammals. A structural model for the clusters is suggested, based on scanning transmission electron microscopy, as wel…
Termoplásticos modificados com elastômeros têm despertado grande interesse de pesquisadores e de indústrias devido à atraente relação custo/benefício e a possibilidade de aumento significativo da tenacidade sob impacto de polímeros frágeis com a incorporação de uma fase borrachosa dispersa. Este artigo mostra a relaçã…
We present preparation of Ge nanostructures formed using by femtosecond laser pulse and origin of visible photoluminescence (PL) properties. High intensity of incident laser energy gives rise to make oxidized layer to surface of Ge nanoparticle after irradiation. Moreover, size dependent Raman shift and PL spectrums a…
meso-Tetraphenylporphyrin and its β-nitro zinc complex derivative react at higher temperature with unstable alkyl nitrile oxides affording isoxazoline-fused chlorins according to dipolar [3+2]-cycloaddition pathway.The respective nitrile oxides were in situ generated from the corresponding nitroalkanes in the presence…
Two modified beta-cyclodextrins (beta-CDs) with a thymine dimer and a thymine oxetane adduct respectively, TD-CD and Ox-CD, have been prepared, and utilized to bind an electron-rich chromophore, indole or N,N-dimethylaniline (DMA), to form a supramolecular complex. We have examined the photosensitized splitting of the…
We have demonstrated circularly polarized light-induced chirality in polymer thin films containing azobenzene linkages in their main-chain backbone. The material used in this study was an amorphous main-chain polyazourea with a high glass transition temperature, which was used to form the fine surface relief gratings.…
We conducted this study to clarify the relationship between manganese solubility and grain sizes of Mg-Al alloys. Mg-5%Al, Mg-9%Al, and Mg-11%Al alloys were prepared using high-purity magnesium (>99.99%) and aluminum (99.99%). These alloys were melted at 1123 K by adding electrolytic manganese (99.99%) and solidified…
In this manuscript we review the structure of the novel 1-D chain complex, {[PtRh(PVM)2(NH3)2Cl2.5]2[Pt2(PVM)2 (NH3)4]2(PF6)6. 2MeOH. 2H2O}n (4) (PVM = pivalamidate), consisting of mixed-valence dimeric complexes with appreciably extended metal–metal bondings. Compound 4 is made up of octameric segments, each of which…
Severe plastic deformation has the fascinating power of alloying equilibrium-immiscible elements, overriding the thermodynamic driving force (positive heat of mixing) that would dictate phase separation in equilibrium. This article briefly reviews the current understanding of this subject, in terms of experimental evi…
An Edge‐on Impact (EOI) technique, developed at the Ernst‐Mach‐Institute (EMI), coupled with a Cranz‐Schardin high‐speed camera, has been successfully utilized to visualize dynamic fracture in many brittle materials. In a typical test, the projectile strikes one edge of a specimen and damage formation and fracture pro…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation D. M. Williamson, S. J. P. Palmer, W. G. Proud; Fracture Studies of PBX Simulant Materials. AIP C…
Chalcogenide based phase change memory (PCM) is a promising type of non-volatile memory that possibly replace the currently wide spread flash memory. Current research on PCMs targets the integration, feasibility, and reliability of such memory technology into the widely used CMOS process technology. Such studies ident…
A composite coating from Amaranthus cruentus flour and stearic acid (10 g stearic acid/100 g flour, 26 g glycerol/100 g flour and stirring speed at 12000 rpm) was applied on fresh strawberries in or- der to verify the effect on its quality. Other treat- ments were effected to comparison: PVC film, bi- layer coating of…
Solubility is a basic phenomenon underlying most industrial processes.The objective of this project is to produce a book that will bring together recent developments in solubility studies that have a bearing on industrial applications, especially the rigorous work that is underpinned by thermodynamic considerations.Th…
Organic semiconductors (polymers and small molecules) are widely used in electronic and optoelectronic technologies. Many devices are based on multilayer structures where interfaces play a central role in device performance and where inorganic semiconductor models are inadequate. Synchrotron radiation techniques such…
Potassium exchange-equilibrium parameters were outcome from quantity-intensity (Q/I) isotherms, i.e. K equilibrium activity ratio ( K O AR ), equilibrium potential buffering capacity for K ( K o PBC ), K labile (KLab), free energy of K replenishment ( K equ G ∆ − ); non-specific (Kx) and specific (∆Kequ) potassium, pr…
Through the use of bulky cyclic terminal groups, anticlinic smectic C phases have been observed in 2-methylbutyl materials based on the MHPOBC motif.
A porous nickel tubular support of diam was successfully created by heat-treating a commercial nickel tube. The resulting tube contained uniform pores, whose diameters ranged from 0.5 to , depending on treatment temperature. The porous metal tube obtained is a promising candidate for support materials for microfuel ce…
In order to study the effect of Cerium on martensitic transformation and microstructure of Ti49.3Ni50.7 alloy, a group of TiNiCe alloys with different content of Ce addition were prepared. The microstructure and the martensitic transformation behavior of TiNiCe ternary alloys were investigated by optical microscopy, s…