Materials Literature
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Go with the flow: Laser-induced flow patterns are used to direct the self-assembly of dissolved inorganic polyoxometalate clusters into robust, hollow tubular networks and micro-materials (see picture; scale bar: 500 μm) in real time. The hollow nature of these materials can be exploited to develop devices in which th…
A figure of merit (FoM), defined as the ratio of Kerr constant to response time, is used to characterize and compare the electro-optic performance of polymer-stabilized blue phase liquid crystals (BPLCs). Increasing the dielectric anisotropy of LC host enhances Kerr constant and lowers the operation voltage, but its a…
The relationship between cutting forces and lattice orientations of monolayer graphene is investigated by using an atomic force microscopy (AFM) based nanorobot. In the beginning, the atomic resolution image of the graphene lattice is obtained by using an AFM. Then, graphene cutting experiments are performed with samp…
Top gated graphene field-effect transistors were fabricated using yttrium oxide film as high-κ gate dielectric, and the gate voltage dependent drain current and gate capacitance characteristics were both measured on one graphene device. Based on the two kinds of data sets, we developed a method to extract the carrier…
We present soft x-ray spectroscopy measurements and electronic structure calculations of ZnTiO${}_{3}$, a ternary oxide that is related to wurtzite ZnO and rutile TiO${}_{2}$. The electronic structure of ZnTiO${}_{3}$ was calculated using a variety of exchange-correlation functionals, and we compare the predicted band…
The interactions between a silica substrate and iron particles were investigated using atomic force microscopy-based force spectroscopy (AFM). The micrometer- and nanosized iron particles employed were either bare or coated with carboxymethyl cellulose (CMC), a polymer utilized to stabilize iron particle suspensions.…
Stable aqueous colloids of ZnS nanoparticles have been synthesised using zinc acetate, sodium sulfide and asymmetric double hydrophilic block copolymers PAA-b-PAM (polyacrylic acid-block-polyacrylamide) with various block molecular weights: MPAA = 1000, 3000, 5000 g mol−1 and MPAM = 10 000, 15 000, 30 000 g mol−1, res…
Abstract Structural, optical, dielectric and ferroelectric properties of Ru-doped BaTi 1− x Ru x O 3 ( x = 0.01, 0.03, 0.05, 0.07, 0.10) nanocubes have been investigated. The average size of nanocube obtained from Rietveld refinement is in the range 35–60 nm. The incorporation of Ru leads to a mixed tetragonal and cub…
The adsorption configuration of organic molecules on mineral surfaces is of great interest because it can provide fundamental information for both engineered and natural systems. Here we have conducted surface-enhanced Raman spectroscopy (SERS) measurements to probe the attachment configurations of DOPA on nanorutile…
Molecular bottlebrushes with hydrophobic poly( n -butyl acrylate) or polystyrene and hydrophilic poly(di(ethylene glycol) ethyl ether acrylate)) side chains were successfully synthesized by grafting from a poly(2-(2-bromoisobutyryloxy)ethyl methacrylate) macroinitiator using iron-based atom transfer radical polymeriza…
A new method to achieve long-range orientational order in symmetric diblock copolymer nanodomains through the alignment and chaining of superparamagnetic nanoparticles in a magnetic field is investigated computationally and theoretically. The effects of nanoparticle size, volume fraction, and magnetization strength ar…
Reversal modes and magnetostatic interactions of multilayered Fe(3)O(4)/ZrO(2)/Fe(3)O(4) nanotubes consisting of a ferromagnetic internal tube, an intermediate non-magnetic spacer and an external magnetic shell are investigated as a function of their geometric parameters and compared with those produced inside the por…
Kenaf fibre reinforced polyester biocomposites fabricated by hand lay-up technique by using propionic and succinic anhydride-modified kenaf fibres. Chemical structure, mechanical, thermal and morphological properties of kenaf fibres reinforced polyester biocomposites evaluated. The Fourier transform infrared study of…
Porphyrin derivatives have applications as photoactive drugs in photodynamic therapy. However, little is known about their interactions with phospholipid membranes at the molecular level. We employed molecular dynamics simulations to model the binding between a series of cationic meso-(N-methyl-4-pyridinium)phenylporp…
Block copolymers offer an appealing alternative to current lithographic techniques with regard to fabrication of next-generation microprocessors. However, if copolymers are to be useful on an industrial manufacturing scale, they must meet or exceed lithography specifications for placement and line edge roughness (LER)…
A heterojunction photodiode was fabricated from ZnO nanowires (NWs) grown on a p-type Si (100) substrate using a hydrothermal method. Post growth hydrogen treatment was used to improve the conductivity of the ZnO NWs. The heterojunction photodiode showed diode characteristics with low reverse saturation current (5.58…
The synthesis of water-soluble quantum dots (QDs) in aqueous phase has received much attention recently. To date various kinds of QDs such as CdTe, CdSe, CdTe/CdS and CdSe/ZnS have been synthesized by aqueous methods. However, generally poor-quality QDs (photoluminescent quantum yield (PLQY) lower than 30%) are obtain…
Abstract We describe the taxonomy and species diversity of 35 taxa of the diatom genus Thalassiosira from a series of net plankton collected quarterly or monthly from eight locations off the Guangdong coastal waters in the South China Sea. Field samples and 14 cultured Thalassiosira clonal strains were studied by ligh…
Though the potassium (K) status of the soil often relies only on its exchangeable-K content, release from nonexchangeable K also contributes to plant nutrition. This process, as well as the opposite one, K fixation, are diffusion controlled and thus depend on time. This study was conducted to (i) assess the influence…
The growth of Al 2 O 3 onto Sn-doped In 2 O 3 (ITO) by atomic layer deposition (ALD) was studied in situ using X-ray photoelectron spectroscopy. Significant diffusion of oxygen from the substrate destroys the self-terminated monolayer adsorption of the metal precursor and results in a nominal initial growth per cycle…