Materials Literature
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While amorphous calcium carbonate (ACC) has been widely exploited as a precursor to crystalline calcium carbonate in solution, the synthetic potential of crystallising ACC in the solid state has received little attention. Building on our recent results which demonstrate that additives occluded within ACC can facilitat…
Irradiation effects in polyethylene and cellulose were examined using molecular dynamics simulations. The governing reactions in both materials were chain scissioning and generation of small hydrocarbon and peroxy radicals. Recombination of chain fragments and cross-linking between polymer chains were found to occur l…
Using scanning tunneling microscopy and density functional theory (DFT), we have analyzed the local electronic properties of (111)-oriented MgO nanoislands on Au(111). Conductance and barrier-height measurements revealed substantial modulations in the electronic structure and electrostatic potential across the islands…
Abstract Transparent cast films of linear low density polyethylene (LLDPE) with nanoclay up to 10 wt % were prepared in one step process using an ultrasonically assisted compounding extruder operating at various ultrasonic amplitudes combined with film casting machine operating at various take up speeds. Thermal, rheo…
The influence of symmetry breaking in a planar metamaterial on transparency effect is numerically investigated. The planar metamaterial's cell is formed by three parallel metal wires. From numerical simulation results, we can see that the transparency effect results from the asymmetric coupling between the cut wires.…
A novel thermotropic liquid-crystalline (LC) biocopolymer, poly{ trans -3-methoxyl-4-hydroxycinnamic acid (MHCA: ferulic acid)- co - trans -3,4-dihydroxycinnamic acid (DHCA: caffeic acid)}, was synthesized by a thermal acidolysis-polycondensation of MHCA and DHCA, efficiently catalyzed by Na 2 HPO 4 . When the MHCA co…
Silica nanoparticles (SiNPs) coated with the pH responsive poly(2-(diethylamino)ethyl methacrylate) (PDEAEMA) shells have been synthesized in different sizes using surface-initiated atom transfer radical polymerization (ATRP). A mixture of the PDEAEMA functionalized SiNPs (20 and 128 nm) was found to efficiently chang…
From the reaction of CuI with an N,S-donor ligand (L) under different molar ratios, two discrete polynuclear copper(I) iodide complexes, [Cu2I2L2] (1) and [Cu7I7L3] (2) were isolated and characterised. Complex 1 contains a rhomboid-type Cu2I2 cluster, whilst complex 2 is the first example showing a pinwheel-type Cu7I7…
Activated carbon prepared from bottle gourd has been used as adsorbent for removal of leather dye (Direct Black 38) from aqueous solution. The activated carbon obtained showed a mesoporous texture, with surface area of 556.16 m(2) g(-1), and a surface free of organic functional groups. The initial dye concentration, c…
Alloyed Zn(1-x-y)Cd(x)Mn(y)Se nanocrystals exhibiting bright intrinsic dual emission attractive for ratiometric optical nanothermometry are reported. Relative to earlier materials with related dual emission, these alloy nanocrystals require shorter syntheses, contain less Cd(2+), and show dual emission that is less se…
Protein-stabilized gold nanoconstructs are widely studied due to their potential applications in biosensing, drug and gene delivery, and bioimaging. While a number of studies have focused on the novel properties of such materials emanating from the gold, there has been little focus on how the protein shell is affected…
Metastable materials usually possess unique properties. How to acquire these properties is still a great challenge. In this work, we explored the electrical properties of metastable BiPO4 through switchable phase transitions. A metastable monoclinic phase (denoted as HTMP) was synthesized by a heat-treatment over a he…
We investigated the threshold voltage instability induced by gate bias (V(G)) stress in ZnO nanowire (NW) field effect transistors (FETs). By increasing the V(G) sweep ranges and repeatedly measuring the electrical characteristics of the ZnO NW FETs, the V(G) stress was produced in the dielectric layer underneath the…
The surface capping of nanoparticles is one of the important ways through which one can alter electronic energy levels and hence enable the development of novel nanostructures with desired properties and specific applications. By using the self-consistent-charge density-functional tight-binding (SCC-DFTB) method we en…
The quartz crystal microbalance technique coupled with cyclic voltammetry (referred to as electrochemical quartz crystal microbalance (EQCM)) was employed to study the oxidation of BH 4 − on Au in alkaline media (0.1 M and 2 M NaOH, respectively) using a newly designed vertical cell to minimize the interference by evo…
Abstract CeO 2 ‐supported Rh and Co bicomponent catalysts derived from monometallic carbonyls and prepared from metal nitrates for low‐temperature ethanol steam reforming (ESR) have been studied by catalytic testing using a multi‐channel reactor, temperature‐programmed reduction (TPR), X‐ray photoelectron spectroscopy…
We describe a versatile strategy for engineering binary and ternary hybrid particles (HPs) through a combination of etching and deposition processes based on colloidal lithography (CL). Non-close-packed (ncp) polymer colloidal crystals were used as both original seed microparticles and templates for generating hybrid…
Abstract Single-crystal Ni-doped gadolinium gallium garnet films were grown for the first time from supercooled Bi 2 O 3 –B 2 O 3 -based melt solutions by liquid-phase epitaxy. Optical absorption bands due to Ni 2+ , Ni 3+ and Bi 3+ ions were observed in those films. Interpretation and tabulation of all absorption ban…
The aim of the present study is to synthesize Pluronic F127-polyethylenimine-folate (PF127-PEI-FA) copolymer, construct a mixed micelle system with PF127-PEI-FA copolymer and Pluronic P123 (PP123) and to evaluate the potential of these mixed micelles as an oral drug delivery system for paclitaxel (PTX). The results of…
The reactivity of a series of substituted aminoalkoxysilanes for surface amine gradient formation has been studied using a newly developed time-based exposure method termed controlled-rate infusion (CRI). The aminoalkoxysilanes used include those that contain primary, secondary, and tertiary monoamines as well as more…