Materials Literature
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We examined the decomposition of polyamides such as nylon-6 and nylon-12 by using supercritical MeOH as the reaction media. The treatment of waste nylon-6 with supercritical MeOH resulted in smooth depolymerization, forming caprolactam as the first product which was then converted to a mixture of methyl 6-hydroxycapro…
A series of single-composition color-tunable phosphors Ca 5 La 5 (SiO 4 ) 3 (PO 4 ) 3 O 2 : Ce 3+ ,Mn 2+ (CLSPO:Ce 3+ ,Mn 2+ ) are synthesized by solid-state reaction, and their luminescence properties are investigated. The obtained phosphors exhibit high absorption and strong excitation bands in the wavelength range…
Although the precise control of dye–dye interactions is known to be of fundamental importance to achieve desired functional properties in π-conjugated materials, there are only sporadic examples where precise structural control of dye–dye interactions could be achieved by the attachment of the chromophores to an oligo…
A wet chemical preparation of MgO with the (111) facet as the primary surface has recently been reported and with alternating layers of oxygen anions and magnesium cations, this material shows unique chemical and physical properties. The potential to utilize the MgO(111) surface for the immobilization of metal particl…
Macroporous networks assembled by interconnected mesoporous Ce1−xZrxO2 solid solution nanofibers were prepared using an electrospinning technique followed by a self-sustaining combustion procedure. This hierarchical porosity helped the mass transfer and resulted in a much higher catalytic activity and stability for th…
The eccentric connectivity index ${;\xi};(G)$ of a graph $G$ is defined as ${;\xi};(G) = \sum _{;u \in V(G)}; deg(u) \varepsilon (u)$, where $deg(u)$ denotes the degree of the vertex $u$ and ${;\varepsilon};(u)$ is the largest distance between u and any other vertex v of G. In this paper we present exact formulas for…
Cellulose, chitin and chitosan are the most abundant biopolymer on earth and constitute an important class of biodegradable materials. The decomposition of three major biopolymers viz. chitin, chitosan and cellulose are studied using simultaneous thermal analysis i.e. thermogravimetry/differential thermal analyzer (TG…
Nanoclay and nanosilica were used to stabilize invert emulsion model drilling fluids for HTHP application. Though each nanomaterial can stabilize the emulsion by itself, best properties were obtained when both were used. Yield stress and plastic viscosity were found to be dependent on composition and the hydrophobic/h…
Taking advantage of the non-covalent interaction between alkyl chains and the sidewalls of a single-walled carbon nanotube (SWCNT), a nanocarbon hybrid of SWCNT and a fullerene (C60) derivative with long alkyl chains was constructed as a donor–acceptor pair for photovoltaics and nanodevice investigations. It was found…
The spontaneous spreading of ionic liquids on a fluoropolymer surface (Teflon AF1600) in air is investigated by high-speed video microscopy. Six ionic liquids (EMIM BF(4), BMIM BF(4), OMIM BF(4), EMIM NTf(2), BMIM NTf(2) and HMIM NTf(2)) are used as probe liquids. The dependence of the dynamic contact angle on contact…
We present a process for the void-free filling of sub-100 nm trenches with copper or copper-manganese alloy by chemical vapor deposition (CVD). Conformally deposited manganese nitride serves as an underlayer that initially chemisorbs iodine. CVD of copper or copper-manganese alloy releases the adsorbed iodine atoms fr…
Triphenylamine-functionalized tetraphenylethene shows aggregation-induced emission feature with unity solid-state fluorescence efficiency. Its amorphous film can function in a p-type FET device with field effect mobility up to 2.6 × 10(-3) cm(2)/Vs.
We present a preparation procedure for small sized biocompatibly coated Ag nanoparticles with tunable surface plasmon resonances. The conditions were optimised with respect to the resonance Raman signal enhancement of heme proteins and to the preservation of the native protein structure.
The reaction between pyridine-2-ylmethanol (HL), anhydrous CoCl(2) and NaH afforded polynuclear Co(II) complexes [Co(7)(L)(12)]Cl(2) (1), [Co(6)Na(L)(12)]Cl (2) and [Co(4)Cl(2)(L)(6)] (3), depending on the HL:CoCl(2) ratio set in the reaction. The core structures of the centrosymmetric complexes 1 and 2 are of the M@C…
In this paper we report the successful incorporation of silicon into SrMO(3) (M = Co, Mn) leading to a structural change from a hexagonal to a cubic perovskite. For M = Co, the cubic phase was observed for low doping levels (3%), and these doped phases showed very high conductivities (up to ≈350 Scm(-1) at room temper…
The left-handed isomer of the helical complex [LZn(3)La(OAc)(3)] was spontaneously enriched from 50 : 50 to 87 : 13 when the quasiracemate crystals were dissolved. The invertible helicity of [LZn(3)La(OAc)(3)] (global chirality) helps the quasiracemate formation and the fixed point chirality of the R,R-cyclohexanediam…
We present an experimental study of the fully reversible assembly of oppositely charged colloidal particles in aqueous solutions. Our polystyrene colloids are charged by a grafted polyelectrolyte brush on their surface and stabilized at all salt concentrations by a neutral adsorbed polymer layer. Below a critical salt…
We give a comprehensive study on regularized approximate electromagnetic cloaking in the spherical geometry via the transformation optics approach. The following aspects are investigated: (i) near-invisibility cloaking of passive media as well as active/radiating sources; (ii) the existence of cloak-busting inclusions…
ZnO nanorods are coated with a conformal film of CdTe nanoparticles using a layer-by-layer (LbL) process. By increasing the number of CdTe layers the absorption of incident light increases at wavelengths lower than the absorption onset of the nanoparticles (650 nm). At the absorption peak of the nanoparticles, 50 laye…
Solid-liquid reactions are commonly encountered in industry as well as every day life. Vast amounts of the applied bulk and specialty chemicals are produced employing solid-liquid reactions. The knowledge of the kinetics is crucial for the design and development of these processes. Quantitative modeling of reactive so…