Materials Literature
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Abstract This mini-review focuses on the recently discovered nanomeshes and nanotemplates made from carbon, boron nitride and their mixtures with a thickness of just a single atomic layer. Typically they exist on some transition metal or semiconductor substrate, the interaction with it playing a crucial role in nanopa…
Highly ordered transparent composite films of CdS and layered double hydroxides (LDHs) have been fabricated using a template synthesis method; the size of the CdS particles in the LDH host can be controlled by adjusting the length of time of the reaction with H(2)S.
Two azine molecules, [3-{4-(dimethylamino)phenyl}prop-2-en-1-ylidene]hydrazone (HL) and [4-(dimethylamino)benzylidene]hydrazone (LL) synthesized via Schiff base condensation, show an absorption band due to intra-ligand charge transfer (ILCT). Both ligands show weak emission in the absence of a metal ion as input. When…
Phase-field method has recently been extended and utilized across many fields of materials science. Since this method can systematically incorporate, the effect of coherency strain induced by lattice mismatch and applied stress as well as external electrical and magnetic fields, it has been applied to many material pr…
Nanostructured films consisting of single Si nanoparticles (NPs) and Er3+ ions layers separated by nanometer-scale Al2O3 layers of controlled thickness have been prepared in order to tune the energy transfer between Si NPs and Er3+ ions. The amorphous Si NPs with an effective diameter of ∼4.5 nm are formed during grow…
The material characteristics of textiles used in elite sports garments have been shown to exhibit a significant influence on both the sporting performance, as well as their aesthetics, particularly in those sports where aerodynamic resistance and its associated energy expenditure impact on winning times. The present s…
We report on spectroscopic study of pyrolytichBN (pBN) by means of time- and energy-resolved pho-toluminescence methods. A high purity pBN samples(though low crystallinity) allow complementary informa-tion about excited states involved into the luminescenceprocess. We affirm our recent conclusions about theimpurity-re…
A great deal of careful experimentation has been carried out over the past 40 years on the critical mechanisms of oxidation in the zirconium alloys used for fuel cladding. However, there is still no consensus on how the nano-scale structure and chemistry of the metal/scale interface control the oxidation kinetics, alt…
It is important to quantify the cavitation energy in all applications ranging from ultrasonic cleaners to cell disruptors. A cavitation meter measures the energy intensity and frequency within ultrasonic and megasonic cleaners, including probes with side-mounted sensors that can be placed within the megasonic jet stre…
Three kinds of photoreactive polyelectrolytes of polyallylamine (PAAm), poly(acrylic acid) (PAAc), and poly(vinyl alcohol) (PVA) were synthesized by the introduction of azidophenyl groups in the respective polymers. The photoreactive PAAm, PAAc, and PVA were micropatterned on polystyrene surfaces by photolithography.…
Investigations in liquid sorption and transport were performed with three different variants of terry woven structures. Terry fabrics were produced using linen warp pile yarns and cotton or linen ground warps and wefts. The process of liquid sorption from the first moment when the water drop beads up the fabric surfac…
We investigate the impact of porosity on the reliability of low-k dielectrics. We show that electric field enhancement around pores occurs and is significantly increased by Cu interaction, suggesting a new potential mechanism for breakdown of dielectrics at stress conditions. We develop of an analytic model to predict…
A reactive and purely inorganic high Mw perfect ladder polyhydrosilsesquioxane (H-LPSQ) was first prepared under the direction of two imperative supramolecular architectures: ladder superstructure (H-LS) and donor-acceptor complex (DAC).
Novel photochromic spiropyrans (SPPs) containing 6 ′ ‐hydroxy group were synthesized and their spectral properties as well as abilities for complexation with metal ions studied. In solutions they exist as equilibrium mixture of spirocyclic (A) and merocyanine (B) isomers. The largest content of merocyanine form was fo…
This investigation enumerates the synthesis and mesomorphic properties of 1,2,3‐triazole containing azobenzene liquid crystals. In these liquid crystals the methylene chain length at non polar end was varied from six to ten carbons to investigate the association properties of non polar chain on the melt. The compound…
The main objective of the present work is to study the effect of mixing of hair fiber on mechanical properties of fly ash. The hair fiber was mixed in fractions of 0.00, 1.00, 1.50, 2.00 & 2.50% respectively. Portland cement production is under critical review due to high amount of carbon dioxide gas released to the a…
Following extended use in organic chemistry, microwave-assisted synthesis is gaining more importance in the field of inorganic chemistry, especially for the synthesis of nanoporous materials. It offers some major advantages such as a significant shortening of the synthesis time and an improved promotion of nucleation.…
Nano-grained BaTiO3 ceramics were prepared using a two-step sintering process. The level of shrinkage and specific surface of the BaTiO3 green bodies were measured as a function of temperature. The two temperatures at which boundary diffusion and lattice diffusion begin to dominate were estimated by measuring the shri…
Os polímeros derivados do petróleo são amplamente utilizados devido à sua versatilidade, propriedades mecânicas e custo relativamente baixo, mas causam impacto ambiental como conseqüência da grande quantidade de resíduos lançados ao meio ambiente. Os problemas gerados pelo descarte de plásticos de origem petroquímica…
Transparent capacitors were prepared using BMN films grown from 25 to on AIZO/glass substrates (Corning 1737) by pulsed laser deposition. The BMN films grown at on the AIZO electrode exhibit a stable interface state between BMN and AIZO electrodes and the lowest root mean square roughness of 1 nm. The Pt/200 nm thick…