Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Natural rubber (NR)-based nanocomposites were prepared by conventional processing techniques using various natural and modified nanoclays. For modified montmorillonite (Cloisite ® 15A), the 300% modulus, tensile, and tear strength exhibited substantial increments of over the gum due to better dispersion. The unmodifie…
A cylindrical ultrasonic reactor was driven at eight discrete frequencies in the range 20−150 kHz. Imaging of multibubble sonoluminescence (MBSL) within this cell showed discrete modes of activity throughout this frequency range. This modal activity was compared to the pressure distribution through the cell and also t…
Carboxymethyl chitosan (CMCh) was prepared and characterized by determinating its degree of substitution and elucidating its structure by elemental analyses and FTIR. Graft copolymerization of acrylonitrile (AN) onto CMCh was carried out in aqueous solution using potassium persulfate (KPS) initiator. Evidences of graf…
Abstract Block copolymer (BCP) thin films have received enormous interest for possible applications in nanotechnology due to their self‐assembled structure formation. However, synthesis of polymers with desired chemical and physical properties sometimes is not possible. During the past 6 years, our group developed a m…
Chitosan has been widely used for biomaterial scaffolds in tissue engineering because of its good mechanical properties and cytocompatibility. However, the poor blood compatibility of chitosan has greatly limited its biomedical utilization, especially for blood contacting tissue engineering. In this study, we exploite…
Abstract The structural, electronic, and elastic properties of ScN and ScP in NaCl (B 1 phase) and CsCl (B 2 phase) structures and the phonon dispersion at ambient and high pressure, close to phase transition, have been investigated by using first‐principles pseudopotential method in the framework of density functiona…
Jute fiber mat (hessian cloth) reinforced PET-based composites (50% fiber by weight) and E-glass fiber matreinforced PET based composites (50% fiber by weight) were fabricated by compression molding and the mechanical properties tensile strength (TS), tensile modulus (TM), elongation at break (%), bending strength (BS…
Dense aluminium nitride ceramics were prepared by spark plasma sintering at a lower sintering temperature of 1700°C with Y 2 O 3 , Sm 2 O 3 and Dy 2 O 3 as sintering additives respectively. The effects of three kinds of sintering additives on the phase composition, microstructure and thermal conductivity of AlN cerami…
Abstract A treatment of graphite fluoride C 2 F with hydrazine vapor resulted in development of conductive surface layer. Exposure of the reduced C 2 F sample to gaseous NH 3 (∼5% in ambient air) was shown to lead to rapid increase in layer resistance. Relative change of resistance averaged over three cycles is ∼14%.…
Nanoflakes, one type of supramolecules that consist of alternating inorganic layers separated by organic moieties, are demonstrated as a good candidate for energy absorption as a thin film. When a bulky molecule is inserted between those layered structures, both modulus and specific energy absorption were increased 12…
Lead sulfide (PbS) microtowers on silicon substrates, having the physical properties of bulk PbS, have been synthesized. Optical nonlinearity studies using the open aperture z-scan technique employing 5 ns and 100 fs laser pulses reveal effective two-photon type absorption. For nanosecond excitation the nonlinear abso…
Abstract We show encapsulation of electrical contacts to freestanding single‐walled carbon nanotubes (SWNTs) by selective nucleation of Al 2 O 3 from atomic layer deposition (ALD). Passivating electrical contacts is often required to prevent degradation of devices, and for chemical sensing it can separate sensing mech…
Vertically-aligned silicon nanowires (SiNWs) that demonstrate reductions of phonon thermal conductivities are ideal components for thermoelectric devices. In this paper, we present large-area silicon nanowire arrays in various lengths using a silver-induced, electroless-etching method that is applicable to both n- and…
We investigate the distribution of element-specific magnetic moments and changes in the spin-resolved unoccupied density of states in a series of half-metallic ${\text{Co}}_{2}({\text{Mn}}_{x}{\text{Ti}}_{1\ensuremath{-}x})\text{Ge}$ Heusler alloys using x-ray magnetic circular dichroism. The Co and Mn magnetic moment…
Resonant x-ray Bragg diffraction experiments on space group forbidden reflections of type $(0k0)$ with $k$ odd taken in the vicinity of the $\text{Fe}\text{ }K$ edge are used to study magnetoelectric effects in ${\text{GaFeO}}_{3}$. The main intensity of the various spectral features is caused by the E1-E1 transition…
The optical gaps of free and embedded Si nanoclusters are studied within the time-dependent local-density approximation. The effects of deformation, the bonding of individual O atoms on the surface, and coverage by ${\text{SiO}}_{2}$ layers on the highest occupied molecular orbital-lowest unoccupied molecular orbital…
Abstract Kenaf/unsaturated polyester composites filled with montmorillonite (MMT) filler were produced. Overall, the study showed that, for samples with kenaf filler only, the strength properties decreased as the kenaf filler loading was increased from 40 to 60%. The increase in the kenaf filler loading reduced the am…
Composite silicon–polycrystalline chemical vapour deposition (CVD) diamond wafers are potential substrates for GaN-based devices for use in harsh environments due to their high thermal conductivity and chemical stability. When cooled from a typical diamond deposition temperature of approximately 800 to 25 °C wafer bow…
The Ostwald rule of stages describes the conjectured transitioning through metastable polymorphic crystal structures during crystallization. Direct observation of the Ostwald rule of stages using was performed using solutions of simple amino acids by second-order nonlinear optical imaging of chiral crystals (SONICC).…
An effective chemical route to nanostructured tungsten oxide films derived from a peroxopolytungstic acid (PTA)/thiourea precursor solution is demonstrated. The conventional procedure of preparing the precursor needs more than 24 h for well-mixing and refluxing the PTA-based solution, while the thiourea-assisted appro…