Materials Literature
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We report a simple method of synthesizing red phosphors, Na2SiF6:Mn4+ and Na2GeF6:Mn4+, by wet chemical etching of Si wafers and Ge shots in aqueous HF solution with the addition of an oxidizing agent NaMnO4. The x-ray diffraction analysis suggests that the red phosphors have the trigonal structure (space group=D32−P3…
The highest value of the dimensionless figure of merit ZT obtainable from a given electronic structure was quantitatively estimated from the linear response theory by considering the normalized spectral conductivity. It was found, by calculating ZT from the possible electronic structures, that the bulk materials with…
Cuprorivaite (CaCuSi(4)O(10), also known as Egyptian blue) exhibits an exceptionally high emission quantum efficiency in the near-infrared region (lambda(max) = 910 nm, Phi(EM) = 10.5%) and a long excited state lifetime (107 mus); these properties make it appealing for several applications in the fields of biomedical…
This feature article reviews dimeric metalloporphyrin hosts employed as chirality probes in chiral recognition processes involving synthetic compounds and natural products. Upon formation of a chiral host-guest supramolecular complex between an achiral bis-metalloporphyrin derivative and a chiral non-racemic guest, a…
Hollow mesoporous carbon spheres (HMCSs) were used for the first time as a bilirubin adsorbent, which showed an extraordinarily high bilirubin adsorption capacity as compared with commercial activated carbon for haemoperfusion, high bilirubin adsorption selectivity and negligible hemolytic activity. The results are ve…
The pH sensor exploits the phenomenon of upconversion luminescence and is based on a hydrogel matrix containing (a) nanorods of the NaYF(4):Er,Yb type that can be excited with 980-nm laser light to give a green and red (dual) emission, and (b) a longwave absorbing pH probe that causes a pH-dependent inner filter effec…
Hybrid carbon nanofibers containing multiwalled carbon nanotubes (CNTs) were produced by electrospinning CNTs suspended in a solution of polyacrylonitrile in N,N-dimethylformamide, followed by carbonization and activation using a hydroperoxide–water steam mixture at 650 °C. Transmission electron microscopy and scannin…
The assembly of multifunctional biomimetic microcapsules at the molecular level is of tremendous interest for biophysical research and the biomedical field. Among the available molecular assembly techniques, layer-by-layer assembly has attracted extensive attention for the fabrication of biomimetic microcapsules becau…
To investigate the degradation mechanisms of electric double-layer capacitor (EDLC) components using triethylmethylammonium (TEMA) tetrafluoroborate ( ) in propylene carbonate (PC), the failure-mode processes of positive and negative electrodes were characterized as a function of the applied voltage . When the cell vo…
The controlling factor and mechanism of the crystallization of polymorphs were investigated in various systems; i.e. amino acids, inorganic compounds (calcium carbonate), pharmaceuticals and inclusion compounds. The controlling factor depends on the systems (compounds and solvents and additives) and the crystallizatio…
This article reviews recent inverse statistical-mechanical methodologies that we have devised to optimize interaction potentials in soft matter systems that correspond to stable “target” structures. We are interested in finding the interaction potential, not necessarily pairwise additive or spherically symmetric, that…
High quality graphene sheets have been prepared by a facile liquid phase exfoliation of worm-like graphite (WEG). This approach combining with the advances in large scale industry manufacturing of WEG could potentially lead to the development of new and more effective graphene products.
Recent progress in the design and development of photocontrollable block copolymer (BCP) micelles is reviewed. By choosing an appropriate photoreaction of photochromic moieties linked to BCPs, such as photoisomerization, photocleavage and photodimerization, various types of control over polymer micelles can be achieve…
A glycine-mediated mixed-solvothermal approach has been proposed for the synthesis of novel Cu(2)O structures with different morphologies and the morphology effect on the antibacterial activity of the obtained Cu(2)O crystals has been studied, confirming that the obtained Cu(2)O crystals all show good antibacterial ef…
Combination of two-dimensional layered materials and intercalation technique offers a new area for developing nanohybrids with desired functionality. Layered double hydroxides (LDHs) are mineral and synthetic materials with positively charged brucite type layers of mixed metal hydroxides. Exchangeable anions located i…
Mesostructured silica particles (∼100 nm diameter with ∼2 nm pores) prepared by surfactant-templated sol–gel techniques are versatile supports that can be easily derivatized with active molecules to create multifunctional materials. By deliberately placing active molecules in different regions of the mesostructure, fl…
Utilising supramolecular pi-pi stacking interactions to drive miscibility in two-component polymer blends offers a novel approach to producing materials with unique properties. We report in this paper the preparation of a supramolecular polymer network that exploits this principle. A low molecular weight polydiimide w…
The collection and conversion of light energy into chemical energy is based on the use of molecular structures of various complexity, where the absorbed light energy is first converted into an excited state able to undergo energy or electron transfer processes and finally it is stored in a charge separated state as ch…
Aggregated Au colloids have been widely used as SERS enhancing media for many years but to date there has been no systematic investigation of the effect of the particle size on the enhancements given by simple aggregated Au colloid solutions. Previous systematic studies on isolated particles in solution or multiple pa…
Layered materials with intracrystalline reactivity undergo intercalation and pillaring reactions to produce materials with useful properties for catalysis, electrodes for Li batteries and adsorbents. New possibilities for the use of layered inorganic solids came out from the layered structures capable of delamination.…