Materials Literature
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OBJECTIVE: Doxorubicin (Dox) is used clinically against various neoplasias, but suffers from serious side effects, and for the past three decades, this shortcoming has spurred research towards finding better drug delivery systems (DDSs) for this frontline drug. METHODS: A non-targeted nucleotropic Dox-loaded nanoparti…
The nature and relative strength of the intermolecular interactions responsible for the behavior of PAMAM dendrimers as encapsulating agents were investigated in neutral aqueous solution through optical spectroscopy methods. In order of relative importance, we found electrostatics, hydrogen bonding, and interactions m…
Transition-metal chalcogenide (TMC) nanoflakes of composition MX2 (where M=Ti, Zr and Hf; X=S and Se) crystallize preferentially in equilateral hexagons and exhibit a pronounced lateral quantum confinement. The hexagonal shape of octahedral (1T) TMC nanoflakes is the result of charge localization at the edges/vertices…
The nonlinear refractive index n2 of SiO2-Al2O3-La2O3 (SAL) glasses of 10 to 24 mol% La2O3 is determined via Z-scan technique at 800 nm in the sub-100 fs time regime. n2 (5.8 to 9.3 × 10−16 cm2/W) correlates linearly with the La2O3 concentration scaling by the factor (0.264 ± 0.007)×10−16 cm2/W per mol% of La2O3. The…
The stress corrosion cracking (SCC) behavior perpendicular to the fusion line in the transition region between the alloy 182 nickel-base weld metal and the adjacent low-alloy reactor pressure vessel (RPV) steel of simulated dissimilar metal weld joints was investigated under boiling-water reactor normal-water chemistr…
Abstract In this paper, three-dimensional models are presented that were developed for both the relative permittivity and the thermal conductivity of composites based on epoxy in an attempt to understand the way in which modified fillers interact with epoxy. Various ceramics were used as fillers, namely magnesium oxid…
Due to their unique size, surface area, and chemical characteristics, nanoparticles' use in consumer products has increased. However, the toxicity of nanoparticle (NP) exposure during the manufacturing process has not been fully assessed. Tungstate NP are used in numerous products, including but not limited to scintil…
In the present work, a highly sensitive chemiluminescence (CL) system for determination of trace bisphenol A (BPA) was established. The method was based on the inhibitory effect of luminol CL by BPA on the Cu NCs-enhanced luminol–KMnO4 CL system for the first time. Water-soluble Cu NCs capped with BSA were synthesized…
macrocycles by protonation led to the generation of unconventional Ag-S nanoparticles with a large energy gap. Theoretical calculations by a hybrid DFT method demonstrated that the silver sulfide clusters with high Ag/S ratio exhibited more localized HOMO-LUMO orbitals, which consequently enlarged their band gap energ…
Ar-BIANH2 bearing different substituents on the aryl rings have been synthesized in high yield by reduction of the corresponding bis(aryl)acenaphthenequinonediimine (Ar-BIAN) compounds. The structure of p-CH3 C6 H4 -BIANH2 in the solid state was determined by X-ray diffraction. An exhaustive voltammetric investigation…
Fabrication and characterization in the THz frequency range of silk foams and silk foam‐based waveguides using lyophilisation and casting techniques are reported. The lack of biocompatible and biofriendly waveguides for low‐loss, low‐dispersion guidance of THz waves motivates the work for applications in remote and st…
Abstract Multifunctional glass windows that combine energy storage and electrochromism have been obtained by facile thermal evaporation and electrodeposition methods. For example, WO 3 films that had been deposited on fluorine‐doped tin oxide (FTO) glass exhibited a high specific capacitance of 639.8 F g −1 . Their co…
The parallel synthesis and properties of a library of photoswitchable surfactants comprising a hydrophobic butylazobenzene tail-group and a hydrophilic carbohydrate head-group, including the first surfactants to exhibit dual photo- and pH-responsive behavior, is reported. This new generation of surfactants shows varyi…
A novel polyoxometalate-based ion-pair compound, [Cu(1,4-bpimb)(H2O)]2[Mo8O26]·4H2O (1), has been synthesized starting from the copper nitrate, flexible linker 1,4-bis[2-(2-pyridyl)imidazol-1-ylmethyl]benzene (1,4-bpimb) and sodium molybdate under hydrothermal conditions. The title compound was unambiguously character…
ABSTRACT The nucleation parameter K g of filled PP, HDPE, and PA6 is determined through nonisothermal DSC measurements. A novel method is proposed for the determination of the size distribution of critical nuclei, where the most commonly found fraction was obtained as a peak value. The models are tested at different c…
We numerically demonstrate an impedance-matched multilayer stacked fishnet metamaterial that has zero index with flat high transmittance from 600 nm to 620 nm. The effective refractive index(n(eff)) is calculated to be -0.045 + 0.466 i and the normalize effective impedance(Z(eff)/Z(0)) is 0.956-0.368 i at 610 nm. The…
The selective cross-linking of individual domains in block copolymer bulk morphologies represents an elegant strategy to generate nanostructured materials of tunable size and geometry. We demonstrate the preparation of highly periodic nanoporous sheets and core–shell cylinders from a stimuli-responsive triblock terpol…
Free poly(L-lactic acid) (PLLA) sheaves and spherulites were prepared by thermally induced phase separation method from its tetrahydrofuran solution without the assistance of other additives. The effects of variables such as polymer concentration, quenching temperature and time on the morphology of PLLA spherulites we…
Abstract Cu–Al spinel oxide, which contains a small portion of the CuO phase, has been successfully used in methanol steam reforming (MSR) without prereduction. The omission of prereduction not only avoids the copper sintering prior to the catalytic reaction, but also slows down the copper‐sintering rate in MSR. Durin…
Two new sodium tellurium oxide materials, β-Na2Te4O9 and Na2Te2O6·1.5H2O, have been synthesized through hydrothermal reactions using Na2CO3, TeO2, and H2TeO4·2H2O as reagents. The structures of the novel materials have been determined by single crystal X-ray diffraction. β-Na2Te4O9 is a new polymorph of ternary tellur…