Materials Literature
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A new aqueous hybrid electrochemical capacitor consisting of a porous positive capacitive electrode and a water-stable multi-layered Li negative electrode is demonstrated. The new cell design affords cell voltages close to 4 V in a mild aqueous electrolyte. Application of a pseudocapacitive positive electrode with hig…
Metal (Au, Pt, Au@Pt) and metal oxide (TiO(2)) nanoparticles are synthesized with colloidal techniques and subsequently used as nanocrystal inks for thin films deposition. The optical properties of Au colloids are strongly influenced by both Pt and TiO(2) interfaces: while platinum causes a damping and a blue-shift of…
Active oxygen species for soot combustion with O2 on LaMnO3 were identified as O22−, O2n− (1 < n < 2) and O2m− (0 < m < 1) for the first time using in situ Raman spectroscopy during temperature-programmed oxidation (TPO) from room temperature to higher temperatures.
For the purpose of preparing liquefied graphene oxide (GO), a process consisting of sulfonation with sodium sulfanilic acid and ionization with bulky amine-terminated Jeffamine® was designed and performed. The obtained hybrid fluid is actually a supramolecular ionic liquid (SIL) with sulfonated GO as the central anion…
Process development studies are being done to recover and reuse zirconium from used nuclear fuel (UNF) zirconium alloy cladding. This has been shown to be economically viable and is a major initiative in waste reduction. The studies have included recovery processes based on dry pyrochemical iodination, chlorination, a…
A polycrystalline ceramic, a new type of complex tungsten bronze type structure, having a general formula Li2Pb2Y2W2Ti4V4O30 has been prepared relatively at low temperature using a mixedoxide technique after optimizing the calcination conditions on the basis of thermal analysis. The material has been characterized by…
Taking advantage of the negligible vapor pressure and dissolving features of ionic liquids (ILs), the solution morphology and dissolution process of cellulose in ILs have been visualized directly by conventional transmission electron microscopy (TEM) at room temperature for the first time.
The polyamic acid (PAA), which is the precursor of polyimide (PI), is synthesized by pyromellitic dianhydride (PMDA) and 4, 4'-oxidianiline (ODA). The PAA/PET composite membrane is prepared with poly (ethylene terephthalate) (PET) nonwoven by electrospinning of the solution of PAA. The final PI/PET composite membrane…
Alkyl thiols (CnH2n + 1SH) with chain lengths (n = 4, 6, 8, 12, 16) were investigated for etching the polydisperse Aun(SG)m mixture in order to obtain nearly monodisperse Au38(SR)24 clusters. FT-IR studies demonstrate that all thiol ligands bound to Au38 clusters are highly ordered and in an all-trans state. X-ray abs…
Three DSA (9,10-distyrylanthracene) derivatives, 9,10-bis(3,5-dimethylstyryl)anthracene (TMDSA), 9,10-bis(3,5-bis(trifluoromethyl)styryl)anthracene (TFMDSA) and 9,10-bis(3,5-difluorostyryl)anthracene (TFDSA) were synthesized and characterized. Here we report their crystal structures, structure-property relationships,…
Based upon comprehensive theoretical investigations and known experimental observations, we predict the existence of the double-chain planar D(2h) B(4)H(2)(1), C(2h) B(8)H(2)(3), and C(2h) B(12)H(2)(5) which appear to be the lowest-lying isomers of the systems at the density functional theory level. These conjugated a…
Solvothermal reaction of Ti(OiPr)4 with CoBr2 in iPrOH at 150 °C gives the ion-separated compound [Ti12O15(OiPr)17]+[(BrCo)6Ti15O24(OiPr)18(Br)]−, the heterometallic Ti15Co6 anion of which contains a Br− ion trapped within a polyoxotitanate shell. This arrangement provides evidence of new host–guest chemistry in this…
We present a systematic investigation of the structural, electronic and optical properties of wurtzite-like ZnX (X = O, S, Se, Te) nanostructures at the DFT/TDDFT level of theory. To provide a direct comparison with the experiment, realistic 1.0–1.5 nm quantum dots have been built up from the bulk. Low-lying computed…
Transparent alumina doped with MgO is fabricated by spark plasma sintering (SPS) under high pressures. An optimum sintering condition explored by changing the combination of the applied pressure and sintering temperature led to an in-line transmission close to the maximum reported for alumina in earlier studies. The e…
We report the direct coating of a novel antireflective (AR) nanoarray structure of silica nanoparticles on highly flexible polymer substrates by a conventional vacuum coating method using plasma-enhanced chemical vapor deposition. Globular-shaped silica nanoparticles are found to be self-arranged in a periodic pattern…
Defect calculations from density functional theory are implemented with space-charge theory models to describe the equilibrium defect chemistry of a Σ3 (111) symmetric tilt boundary in BaZrO(3). As such, the space-charge potential and the concentrations of , , , NH and in the bulk, core and space-charge regions of the…
Spherical nickel–carbon (Ni–C) monoliths have been successfully synthesized via a solvothermal route and subsequent heat treatment without any templates, which offers a green and easier method to synthesize carbon-based materials. The macroscopical size of the spherical Ni–C monoliths is about 1 cm in diameter and the…
Powdery nickel ferrite, NiFe2O4 has been obtained by soft mechanochemical synthesis in a planetary ball mill. Ni(OH)2 and Fe(OH)3 are used as initial compounds. This mixture was mechanically activated for 25h, uniaxial pressed and sintered at 1100?C for 2h. The phase composition of the sintered sample was analyzed by…
We show that small (≤4%) amounts of water which detonation-produced nano-diamond powder always adsorbs spontaneously from air can increase its dielectric permittivity (ε) at low frequencies from single digits to over 1019, by far the highest value observed for any system including ferroelectrics. Conversely, traces of…
A platinum complex bearing a tetraethylene glycol chain has been designed and its self-assembly properties investigated. In solution, only a yellow phosphorescence of the aggregated species is observed. The complex gives luminescent gels of different colours with DCM and DMF, reaching up to 60% photoluminescence quant…