Materials Literature
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The freshwater common pond snail Lymnaea stagnalis produces embryos that complete direct development, hatching as shell-bearing individuals within 10 days despite relatively low ambient calcium and carbonate availability. This development is impaired by removal of ambient total calcium but not by removal of bicarbonat…
Mannose-substituted blue-fluorescent cationic conjugated polyelectrolyte ( P1 ) and yellow-fluorescent neutral conjugated oligomer ( 6 ) are synthesized via the combination of Suzuki coupling polymerization and click chemistry. The spectral overlap between the emission of P1 and the absorption of 6 allows one to blend…
In this paper the photocontrolled manipulation of solid materials on the surface of a liquid crystalline thin film is described. Three different types of films namely cholesteric liquid crystal (ChLC), compensated nematic liquid crystal (NLC) and nematic LC were used. The rotational and translational manipulation of t…
Luminescent and porous silica fibers have been successfully prepared by using the electrospinning process. The obtained multifunctional silica fibers, which possess a porous structure and display blue luminescence, can serve as a drug delivery host carrier, using ibuprofen (IBU) as a model drug, allowing the investiga…
The photoreactivity of two iron(II)−styrylpyridine frameworks Fe(stpy) 4 (NCSe) 2 (stpy = 4-styrylpyridine) has been investigated for the very first time in a crystalline solid. A quantitative cis-to-trans isomerization of stilbenoids is shown to occur in the confined environment of the inorganic solid. The photochrom…
In this study, the sandwich plank consisted of 7D polyethylene teraphthalate (PET), thermoplastic polyurethane (TPU) honeycomb grid, and polyurethane (PU) foam; 7D PET and 4D low melting polyester fibers were needle-punched and thermal-treated so as to form the PET nonwoven layer. The PU foam was foamed with a differe…
As propriedades de termo estabilidade das nanofibras de celulose estão relacionadas diretamente com a sua aplicação e em especial ao processamento de polímeros cujas temperaturas típicas de processamento encontram-se em torno de 200 °C. Neste trabalho, nanofibras de algodão comercial foram extraídas empregando-se dife…
We demonstrate a strategy for producing polymer bioconjugates which display both enzymatic and thermal responsiveness. This is achieved by combining the thermo-responsive properties of poly(2-isopropyl-2-oxazoline) (PiPrOx) with the self-assembly properties of fluorenylmethoxycarbonyl-tyrosine (Fmoc-Y), controlled by…
The high demand for cotton production worldwide has demonstrated the need for standardized classification of foreign matter present with cotton. Cotton trash can become comingled with fiber during the ginning and harvesting processes. The conventional instrumental method used to determine the amount of cotton trash pr…
We present results of research into the design and construction of membrane photon sieves as primaries for next-generation lightweight space telescopes. We have created prototypes in electroformed nickel as well as diazo and CP-1 polymer films. In two such cases, diffraction-limited imaging performance was demonstrate…
Abstract Electronegativity (EN) can be used to estimate the bulk modulus of different types of crystal materials on the basis of a newly proposed bulk modulus model. The bulk moduli of A N B 8− N and A m B n type compounds, spinel‐ and chalcopyrite‐structured compounds as well as polymorphic ABO 4 compounds are calcul…
The cluster expansion has proven to be a valuable tool in materials science to predict properties of configurationally ordered and disordered structures but the generation of cluster expansions can be computationally expensive. In recent years there have been efforts to make the generation of cluster expansions more e…
A new spin-crossover (SC) complex [Fe(II)H(2)L(2-Me)][AsF(6)](2) has been synthesized, in which H(2)L(2-Me) denotes the chirogenic hexadentate N(6) Schiff-base ligand bis{[(2-methylimidazol-4-yl)methylidene]-3-aminopropyl}ethylenediamine. This complex has revealed a rich variety of phases during its two-step thermal c…
Atmospheric pressure plasma polymerization of hexamethyldisiloxane (HMDSO) was carried out to impart water repellent properties to 100% cotton fabric. The dielectric barrier discharge generated from a mixture of argon and HMDSO was used for the plasma polymerization. The AATCC spray test, contact angle and surface ene…
Dispersing nanoparticles in a polymer can enhance both mechanical and transport properties. Nanocomposites with high thermal conductivity could be obtained by using thermally conductive nanoparticles. Carbon-based nanoparticles are extremely promising, although high resistances to heat transfer from the nanoparticles…
The conformational ordering in spherulites of isotactic polypropylene during growing process is studied with in situ infrared microspectroscopic imaging. A comparison between the intensity distribution of bands representing crystal and conformational ordering indicates that large concentration of conformational ordere…
The optical properties of a photoluminescent dye rhodamine B (RhB) interacting with gold nanoparticles (AuNP) have been investigated using plasmonic absorbance, fluorescence, and resonance elastic light scattering (RELS) spectroscopy. We have found that these interactions result in a multimodal coupling that influence…
The three-dimensional Fermi-surface morphology of superconducting ${\mathrm{BaFe}}_{2}({\mathrm{As}}_{0.37}{\mathrm{P}}_{0.63}{)}_{2}$ with ${T}_{c}=9\text{ }\text{ }\mathrm{K}$ is determined using the de Haas--van Alphen effect. The inner electron pocket has a similar area and ${k}_{z}$ interplane warping to the obse…
Selective oxidation is of immense importance in the synthesis of chemical intermediates and the epoxidation of alkenes by the electrophilic addition of oxygen to a carbon–carbon double bond remains one of the most significant challenges in oxidation catalysis. Although molecular oxygen is the most environmentally beni…
An intensive investigation of structure-property relationships in the aggregation-induced enhanced emission (AIEE) of luminescent compounds is essential for the rational design of highly emissive solid-state materials. In the AIEE-active compounds N,N'-bis[3-hydroxy-4-(2'-benzothiazolyl)phenyl]isophthalamide and N,N'-…