Materials Literature
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Abstract Carbon nanofibers of ca. 1 μm by 20 nm dimensions have been successfully prepared by an improved route, consisting of the graphitization of polyacrylonitrile (PAN) previously formed inside the nanosized pores of sepiolite. This natural microfibrous silicate contains structural tunnels extending along the whol…
High-quality CdS, ZnS and alloyed ZnxCd1 − xS nanocrystals are synthesized in the commonly available coordinating solvent, high boiling-point long-chain amines, using the corresponding metal salts (such as metal stearate, acetate, chloride, sulfate etc.) and elemental sulfur as the precursors. The obtained CdS and all…
The ligands tris[3-(2-pyridyl)pyrazol-1-yl]hydroborate (L1, potentially hexadentate) and bis[3-(2-pyridyl)pyrazol-1-yl]dihydroborate (L2, potentially tetradentate) have been used to prepare ternary lanthanide complexes in which the remaining ligands are dibenzoylmethane anions (dbm). [Eu(L1)(dbm)2] is eight-coordinate…
Dendrimers and hyperbranched polymers are emerging as potentially ideal drug delivery vehicles because they provide a significant amount of tailorability and a large density of functional groups. This study explores the dynamics of cellular entry of dendrimers and hyperbranched polymers alone, and in the complexed for…
The apatite-type phases, La(9.33+x)(Si/Ge)(6)O(26+3x/2), have recently been attracting considerable interest as potential electrolytes for solid oxide fuel cells. In this paper we report results from a range of doping studies in the Si based systems, aimed at determining the key features required for the optimisation…
Abstract A new method for the preparation of ultrathin tethered polymer layers with gradually changing thickness was developed utilizing the “grafting to” approach. The grafting procedure allowed translation of the temperature gradient created in a heating stage into a gradient of polymer chain grafting density. The g…
Synthesis of graphite by extraction of iron from iron carbide by chlorine is reported in this work. This process is attractive because it can produce well-ordered graphite at temperatures as low as 600 °C, providing an opportunity for low-temperature solid-state synthesis. Thermodynamic simulation was used to determin…
Thick composites composed of crystalline manganese dioxide ( MnO 2 ) and multiwall carbon nanotubes (MWCNTs) were successfully codeposited onto a graphite substrate from an Mn ( AcO ) 2 ⋅ 4 H 2 O + MWCNTs solution. The rate/nucleation mechanism of MnO 2 deposition was significantly influenced by the introduction of MW…
Small-sized liposomes have several advantages as drug delivery systems, and the ethanol injection method is a suitable technique to obtain the spontaneous formation of liposomes having a small average radius. In this paper, we show that liposomal drug formulations can be prepared in situ, by simply injecting a drug-co…
Abstract We present a hybrid quantum mechanical/molecular mechanical technique recently developed and implemented in the computational chemistry software environment, ChemShell, aimed at the study of reactions at the surfaces of ionic solids including reconstructed polar surfaces and interfaces. The method follows app…
A new tridentate Schiff base ligand HL (L = C14H19N2O), derived from the condensation of benzoylacetone and 2-dimethylaminoethylamine in a 1:1 ratio, reacts with copper(ii) acetate and cyanate, thiocyanate or azide, to give rise to several end-to-end polymeric complexes of formulae [CuL(mu(1,3)-NCO)]n 1, [CuL(mu(1,3)-…
Abstract By using modern XPS systems it is possible to obtain spectra with well‐resolved spin orbit, multiplet and field splitting even with powder samples mounted using adhesive tape. Measurement of Cr 2 O 3 powder with the latest generation of XPS spectrometers, which are able to analyse non‐conductive powders with…
Abstract Summary: Three polymers consisting of alternating perylene bisimide chromophores and flexible polytetrahydrofuran segments of different length have been studied using absorption and (time‐resolved) photoluminescence spectroscopy. In o ‐dichlorobenzene, the chromophores self organize to form H‐like aggregates.…
Nanostructured manganese oxide electrodes are electrochemically synthesized by cyclic voltammetric and potentiostatic methods. Electrode structure greatly influences the electrochemical performances of the capacitors. An electrode composed of evenly distributed 30 nm nanorods fabricated by cyclic voltammetry has a hig…
Identical strontium-doped and yttria-doped zirconia (LSM-YSZ) composite electrodes were characterized in three separate cell configurations, in air at 973 K using impedance spectroscopy. These configurations included a single-cell solid oxide fuel cell (SOFC), a symmetric cell (cathode/YSZ/cathode), and a thick pellet…
The exfoliated nanocomposites (LLDPE/ZnAl LDH) were synthesized by refluxing dodecyl sulfate-intercalated ZnAl-layered double hydroxide [Zn3Al(DS)] in a non-polar xylene solution of linear low density polyethylene (LLDPE). Their thermal and mechanical properties were studied via X-ray diffraction (XRD), transmission e…
The maintenance of distribution networks is more effective if the insulation contamination levels are known. The selection of measuring methods of pollution levels is then crucial. The relationship between several evaluation methods of pollution levels and the operating behaviour of several insulator profiles in a pol…
A simple method with a high product yield (about 99%), i.e. , chemical oxidation of with is successfully developed for the synthesis of hydrous ruthenium oxide (denoted as The main product of this chemical synthesis is with a significant amount of from the X-ray photoelectron spectroscopy results. All powders without…
Single-walled carbon nanotube (SWNT) density and bundle size has been controlled by a simple one step CVD growth process using a polyferrocenylsilane block copolymer as the pre-organized catalyst source.
Rotor-like ZnO was grown from a mixture of rod-like ZnO powder and a saturated Zn(OH)(4)(2-) solution under moderate hydrothermal conditions at 100 degree C, in which the precursor rod-like ZnO crystal plane acts as a matrix core, and the branched nanorods showed fast epitaxial growth on the six directions around the…