Materials Literature
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Abstract Usual rubber products are a composite from rubber and nano-filler ( e.g. carbon black, silica, etc. ), and it is believed that the good dispersion of the nano-filler is the most important issue determining the performance of rubber vulcanizates. So far, transmission electron microscopy (TEM) has been the most…
Stokes and anti-Stokes non-resonant hole-enhanced Raman scattering (HERS) spectra with high signal-to-noise ratio (S/N) are reported for the first time for aqueous phase R6G molecules adsorbed onto random nanoholes in thin gold films. Compared to conventional surface-enhanced Raman scattering from nanometric gold coll…
Potassium niobate (KNbO 3 ) fine powder has been successfully synthesized at a low temperature of 500 °C through a modified solid state reaction, in which urea [CO(NH 2 ) 2 ] plays an important role. High-density KNbO 3 ceramics can be obtained by the conventional sintering of the synthesized KNbO 3 fine powder with t…
Fibras rígidas de piaçava do tipo Attalea funifera Mart vêm sendo recentemente investigadas como reforços efetivos para compósitos de matriz polimérica. Os trabalhos até agora realizados nestes compósitos mostraram um razoável aumento na resistência mecânica com a proporção de fibra. Como algumas possíveis aplicações…
ZnS nanostructures with different morphologies of submicrospheres, nanosheets and nanorods were synthesized by solution precipitation of thiourea with Zn(NO(3))(2) in the presence of block copolymer at low temperature. The sizes and morphologies of ZnS can be controlled simply by changing the processing parameters. Th…
The pH-responsive behavior of cationic diblock poly(2-(dimethylamino)ethyl methacrylate)-block-poly(2-(diethylamino)ethyl methacrylate) copolymer micelles adsorbed at the silica/aqueous solution interface has been characterized. The micellar morphology of this copolymer, initially adsorbed at pH 9, can be dramatically…
The refined x-ray crystal structure of the phase Mg(27)Al(10.7(2))Zn(47.3(2)) (Pa3) establishes it as the new 2/1 Bergman-type approximant of the icosahedral quasicrystal. The primitive cubic lattice consists of condensed triacontahedral and novel prolate rhombohedral (PR) clusters. Each triacontahedron encapsulates t…
Purpose Aims to investigate the inhibitive effect of the new series of Schiff base molecules, namely, N, N′‐ethylen‐bis(salicylidenimine) [S1], N, N′‐isopropylen‐bis(salicylidenimine) [S2] and N, N′‐Ortho‐phenylen acetyl acetone imine, (2‐hydroxy Benzophenone imine) [S3] on corrosion of copper during acid pickling tre…
A convenient preparation is reported for subnanometre size uncapped ZnO quantum dots, which permits the previously inaccessible live observation of the growth of the clusters in the molecular size regime. The preparation method utilizes electric field-induced transient pore formation (electroporation) in synthetic uni…
Tantalum liners have been successfully bonded to the inside surface of an M242 Bushmaster barrel using a low-detonation velocity explosive. This report examines the governing equations of the explosive bonding process as they apply to this particular situation. The relevant properties of other high-strength tantalum a…
In this and the following companion articles, the authors present the 2ω method, a novel ac mode local thermal property imaging technique with nanoscale spatial resolution. To demonstrate the use of the thermoelectric probe as an active one that can function as both a heater and a temperature sensor, the authors devel…
Abstract The attenuation of heavy metals in ground water depends on factors such as solid‐solution equilibrium or the solubility product ( K sp ) of the solid phase. Metals are pH dependent, and the solubility of heavy metal hydroxides such as lead, cadmium, zinc, and nickel is minimal within pH range 9 to 11. MgO as…
Abstract As‐grown (100) homoepitaxial diamond films with boron concentrations [B] from 4.6 × 10 16 to 1.5 × 10 21 cm –3 have been analysed using X‐ray photoelectron spectroscopy (XPS). Their C 1s core levels contain a dominant component around 284.17 ± 0.2 eV ascribed to sp 3 C and a main secondary component around 28…
To study the structure-function relationship of the oxidative-damage effect of ascorbic acid, we have focused on the interaction between plasmid DNA pUC19 and a series of ascorbic acid derivatives modified on different OH groups in the presence of transition metal ions. Some ascorbic acid derivatives can selectively c…
The encapsulation of individual nanoparticles has gained great attention as a method for both stabilizing nanoparticles and tailoring their surface properties. In particular, the encapsulation of nanoparticles with silica shells is advantageous for bioconjugation and applications to (nano)biotechnology. Herein we repo…
Abstract Nanocrystalline diamond (NCD) films were grown by microwave plasma CVD in hydrogen‐based gas mixture. Deposition experiments were performed at different temperatures varying from 370 to 1100 °C. Before growth step, silicon (100) oriented substrates were nucleated by bias enhanced nucleation procedure and glas…
Abstract Three series of novel modified polyazomethines were prepared with mesogenic units and varying kinking groups. The effect of the incorporation of the kinking groups on the thermotropic properties of the alternated and random polymers was studied. Structural elucidation was carried out by elemental analysis, in…
In this review, we report on the newly developed area of research devoted to the formation of self-assembled monolayers of metallophthalocyanines by focusing on some significant examples dedicated to electroanalytical applications. We also summarize recent examples on the use of electropolymerized metallophthalocyanin…
Chitosan/silica hybrids (Chitosan/SiO2) using a sol-gel process were prepared at a wide range of in situ silica content from 0% to 100%. This work was undertaken to investigate the thermal properties, optical, adsorption, and biodegradability properties of this type of hybrid. Fourier transform infrared (FTIR) spectra…
Abstract Conductive polymer composites (CPCs) can be obtained by blending an insulating polymer matrix with conductive fillers. When the percolation of the dispersed particles is achieved, it is possible to obtain a sensible material for self‐regulated heating by the Joule effect. To fit the durable development concep…