Materials Literature
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A major challenge in the synthesis of porous metal oxides is the control of pore size and/or wall thickness that may affect the performance of these materials. Herein, nanoporous β-MnO₂ samples were prepared using different hard templates, e.g., ordered mesoporous silica SBA-15 and KIT-6, disordered mesoporous silica,…
Abstract We used a helical polymer backbone (polyacrylamide) as a scaffold to organize perylene diimide chromophores into well‐defined foldamers, which further undergo self‐assembly into supramolecular tube‐like arrays in aqueous media, as revealed by cryo‐TEM imaging. The arrays are supramolecular polymers, whose str…
Extremely bright optical luminescence was observed from TbP 5 O 14 and EuP 5 O 14 under Cu Kα X-ray irradiation. Peak intensity of luminescence from TbP 5 O 14 and EuP 5 O 14 increased with current and voltage of X-ray source. X-ray excited green luminescence peaks from TbP 5 O 14 crystal are assigned as 5 D 4 - 7 F 6…
In this paper, we report a first-principles study of the lattice dynamics of small graphene nanoribbon with zigzag edges. Our investigation is based on spin polarized density functional calculations (DFT). Nesting properties in the electronic band structure are very different for nanoribbons with unpolarized, ferromag…
Abstract The aim of the study was to investigate the possibility to use spruce xylan more efficiently by possible relocation of dissolved xylan with certain characteristics from the first part of the kraft cooking to the later part, when precipitation occur. The characteristics of re-located xylan was controlled by re…
Dissipative particle dynamics simulations are performed to investigate the self-assembly of rod-coil diblock copolymers R(N(R))C(N-N(R)) within a rod-selective slit. The self-assembled structure of the confined system is sensitively dependent on the rigidity kθ and the fraction fR of the rod block and the slit height…
The study of guest–guest interactions in cocrystalline polymer samples is in general complicated by their possible occurrence in both amorphous and crystalline phases. In this paper we show that polarized FTIR spectra of axially oriented films allow discrimination between spatially ordered and disordered guest–guest h…
We have studied shear-induced aggregation of colloidal silica particles suspended in a variety of partially miscible liquid mixtures. The shared characteristic of the investigated systems is that after liquid-liquid phase separation of the binary liquid mixtures one phase completely wets the particles. We have explore…
In this report, a series of peptide nucleic acid amphiphiles (PNAAs) with hybridization properties were designed and synthesized. Driven by hydrophobic interaction, the hybridized PNAAs can form uniform micelles, the base stacking interaction from PNA segments further stabilized the micelles. The effects of hydrophobi…
We use in situ transmission electron microscopy to directly observe, at high temporal and spatial resolution, the interaction of ferroelectric domains and dislocation networks within BiFeO3 thin films. The experimental observations are compared with a phase field model constructed to simulate the dynamics of domains i…
A novel class of submicron colloidosomes has been assembled from nanodiamonds. These capsules, which we call diamondosomes, are self-assembled from either negatively or positively charged detonation nanodiamonds at a decane/water interface using lipids to induce shell formation. Diamondosomes show high shell stability…
In drug delivery systems, mathematical modeling plays an important role in elucidating the release mechanisms, the potential applications of a determinate system matrix–drug, or the design of new delivery systems. In this work, we have modeled porous biodegradable foams based on polylactide (PLA) and poly(lactide- co…
Two enantiotopic 1D chain compounds, [Cu3(L1)3(H2O)2(H2W12O40)]·4H2O (1a,b; L1 = 2-(4,6-bis(pyridin-2-yl)pyridin-2-yl)pyridine), crystallizing in the chiral space group P212121 were prepared and spontaneously resolved in the absence of any chiral source. Interestingly, compounds 1a,b can be prepared from a [W7O24](6-)…
The title structures NaGdS2 (sodium gadolinium sulfide), NaLuS2 (sodium lutetium sulfide) and NaYS2 (sodium yttrium sulfide) were redetermined in order to improve the structural information available for the family of group 1 and thallium rare earth sulfides, which are isostructural with the rhombohedral α-NaFeO2 stru…
Doping of BiOCuSe at the copper site with divalent cadmium and zinc cations has been investigated. Analysis of the powder x-ray diffraction data indicates that the ZrCuSiAs structure of BiOCuSe is retained up to substitution levels of 10 and 5 at.% for Cd 2+ and Zn 2+ , respectively. Substitution of monovalent Cu + wi…
Abstract Live imaging of exocytosis dynamics is crucial for a precise spatiotemporal understanding of secretion phenomena, but current approaches have serious limitations. We designed and synthesized small‐molecular fluorescent probes that were chemically optimized for sensing acidic intravesicular pH values, and esta…
A series of merocyanine dyes with a wide range of molecular dipole moments were deposited on metal oxides covering a wide work function (Φ) range (2.3 to 7.0 eV), and the energy level alignment at these interfaces was studied with photoelectron spectroscopy. We find that a preferential orientation of the merocyanines…
Abstract A careful study of the phosphorescence afterglow and the thermoluminescence (TL) of sol-gel-prepared m-ZrO2 nanocrystalline powders in an extended temperature range −100 to 300 °C was carried out. Wavelength-resolved TL proved the existence of a single active luminescence centre in this temperature range. A T…
In the present work, we report a novel luminescent characteristic of the ZnS ceramics. ZnS undoped nanopowders have been synthesized by a wet chemical precipitation method using Na2S as the source of sulfur. Spark plasma sintering (SPS) has been applied to the nanopowders to fabricate dense ZnS ceramics in the pure ph…
In order to eliminate the energetic potential in the case of postulated core-disruptive accidents (CDAs) of sodium-cooled fast reactors, introduction of a fuel subassembly with an inner-duct structure (FAIDUS) has been considered. Recently, a design option of FAIDUS which leads molten fuel to upward discharge has been…