Materials Literature
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This paper explores preparation of spherical bacterial cellulose (BC), a novel biomaterial, and its adsorption capacity is charaterized. The effect of shaking speed and culture duration on fermentation production of BC spheres is analyzed; BC spheres are produced after 72 h fermention at 30°C with a shaking speed of 1…
Abstract—Three-dimensional (3D) axisymmetric invisibility cloaks with arbitrary shaped in layered-media background are presented using the transformation optics. The inner and outer boundaries of the cloaks can be non-conformal with arbitrary shapes, which considerably improve the flexibility of the cloaking applicati…
Eu 2+ or Cr 3+ singly doped and Eu 2+ -Cr 3+ co-doped MgSrAl 10 O 17 luminescent materials were synthesized by solid-state reactions and their photoluminescence properties were investigated. These luminescent materials have absorption in the UV-Vis region and give luminescence in the deep-red region (∼693 nm), which a…
Optical microscopy (OM), semi-contact atomic force microscopy (sc-AFM), and transmission electron microscopy (TEM) were applied to examine cells in the broncho-alveolar lavage fluid (BALF) obtained from rats 24 hours after instillation of different metallic particles suspended in deionised water or of water without an…
Conjugated copolymers built upon quinone diimine-zinc(II) porphyrin units exhibit a very low lying charge transfer band at 800 nm and are strongly emissive from the S(2) and T(2) states.
The PLA/PHBV blends were prepared using dry blend in the melt spinning method. The ratios of PLA:PHBV were varied with 100:0, 95:5, 90:10, 85:15 and 80:20 wt%. The temperature of single screw extruder was set at 210 to 235 °C with screw speed 9 rpm and free fall at draw speed 450, 500 and 550 m/min. The textile fibers…
Three-dimensional (3D) ZnO–CuO core-shell nanorod arrays have been synthesized by a three-step process on silicon (100) substrates. A hydrothermal method was used to grow 3D ZnO nanorod arrays, followed by deposition of Cu nanofilm using sputtering, which was oxidized subsequently at 400 °C to form CuO shell surroundi…
An organogelator with two distinct π-functional units is able to incorporate carbon nanotubes into its mesh of fibres in the gel state. The morphology of the material derived from this nanocomposite after evaporation of the solvent is a complex mesh of fibres which is clearly different from the pure gelator. This feat…
Periodic mesoporous Eu(3+) doped titania materials were obtained through the EISA (Evaporation Induced Self Assembly) process. Eu(3+) ions, entrapped within the semi-crystalline walls of the highly porous framework, appear to be advantageous during the probing of surface photochemical reactions. Its emission intensity…
The Dawson-type polyanion [α-Mo(18)O(54)(SO(3))(2)](4-), with two SO(3)(2-) templates embedded inside a polyoxomolybdate(vi) cage, exhibits thermochromism over an exceptionally wide temperature range (∼500 K). The temperature dependence of the cluster structure, established from X-ray crystallography, IR and Raman spe…
Highly oriented layered double hydroxide (LDH) thin films are obtained from colloidal dispersion of exfoliated LDH nanosheets in formamide by vacuum filtration. Through filtration, positively charged LDH nanosheets are stacked in interlocking arrangements, which endow LDH thin films with excellent mechanical propertie…
The selective alkylation of primary amino groups of polysaccharide is conducted through the interaction of chitosan with glycidyltrimethylammonium chloride with introduction of the quaternized amino group into every alkylated unit, thereby ensuring a positive charge and solubility of the polymer over the entire pH ran…
An external heavy-atom effect in crystals was found to influence the reaction path of the photocyclization of cyclohexenones drastically, and that was successfully applied to control the cis-trans stereochemistry of the reaction by making co-crystals of heavy-atom containing and non-containing analogues in various rat…
Poly(4-chloromethyl styrene-g-4-vinylpyridine)/TiO2 ((PCMSt-g-P4VP)/TiO2) nanocomposite was employed as template for the synthesis of polypyrrole (PPy) in the nanometer-sized domain using a chemical oxidation polymerization method. For this purpose, at first P4VP chains of (PCMSt-g-P4VP)/TiO2 nanocomposite were comple…
When treating oily wastewater, fibrous coalescer technology has the advantages of convenient operation, longer service period of coalescence materials, high oil removal efficiency, without additional reagent, high ability in value maintenance of recovered oil, thus has attracted increased interests in recent years. Ex…
We present a new strategy to electrochemically control the swelling state and mechanical properties of a polyelectrolyte multilayer thin film. While a number of pH-responsive polymer films and hydrogels have been developed, biological systems typically will not tolerate substantial deviations in pH. Therefore, to appl…
A green and efficient synthetic approach has been developed using supercritical carbon dioxide as a transport medium for the diffusion embedding of core shell CdSe/CdS quantum dots (QD) into polytetrafluorethylene (PTFE) microparticles, leading to matrix immobilisation of QD in PTFE. Transmission electron microscopy a…
The paper reports on covalent linking of a modified amphiphilic polymer, the alkynyl-terminated Zonyl, to azide-terminated nanodiamonds by click chemistry. An analysis of the hybrid particle stability is presented based on size and zeta potential measurements. The antifouling character of the grafted nanodiamonds was…
Mapping the transition of Ag nanotriangle to nanohole arrays revealed that the optimal SERS response was obtained near the transition. Correlated AFM and Raman imaging provided novel experimental proof that hot spots are located on Ag islands for nanotriangle arrays and in the core area of the hole for nanohole arrays…
Photochromism is a chemical process in which a compound undergoes a reversible change between two states having separate absorption spectra, i.e. different color [1]. In our previous work we have published some solutions of problems of measuring photochromic textile sample by standard commercial spectrophotometric sys…