Materials Literature
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Hexyl methacrylate (HMA), methyl methacrylate (MMA), and methacrylic acid (MAA) were used as comonomers to produce a low glass transition temperature material, potentially useful in fabricating a small diameter vascular graft. Because it has been shown that grafts seeded with endothelial cells have better resistance t…
We present direct depletion potential measurements for a single colloidal sphere close to a wall in suspensions of charged colloidal rods. In contrast to earlier studies of purely entropic systems (Helden et al. Phys. Rev. Lett. 2003, 90, 048301), here electrostatic interactions are important. These enhance the deplet…
Abstract Ring‐opening copolymerization of maleic anhydride (MA) with propylene oxide (PO) was successfully carried out by using double‐metal cyanide (DMC) based on Zn 3 [Co(CN) 6 ] 2 . The characteristics of the copolymerization are presented and discussed in this article. The structure of the copolymer was characteri…
This is a compilation of over 170 technical recommendations prepared by RILEM Technical Committees between 1972 and 1994. These give authoritative procedures for the testing and use of many construction materials. The book presents an authoritative source of reference for engineers, scientists and technologists involv…
Abstract Composites of unplasticized poly(vinyl chloride) (PVC) blended with bamboo flour and pine flour, respectively, were prepared in a batch mixer followed by compression molding. The effects of wood flour fillers on the morphology, static mechanical properties, and thermal properties of the composites were invest…
By means of femtosecond pump and probe spectroscopy, linear and nonlinear optical properties of silver nanoprisms have been investigated, focusing on enhancement of local electric fields due to dipole and quadrupole surface plasmons. Ag nanoprsims were prepared by direct reduction of AgNO 3 by the solvent N, N -dimeth…
One-dimensional crystals of potassium halides, including KI, KCl, and KBr, were inserted into boron nitride nanotubes. High-resolution transmission electron microscopy (HRTEM) and energy-dispersive X-ray spectrometry were used to characterize their microstructures and compositions. The fillings are usually single crys…
The hexagonal, silica-based, mesoporous material SBA-15 is prepared using poly(ethylene oxide)−poly(propylene oxide)−poly(ethylene oxide) block co-polymer (Pluronic P123, PEO 20 −PPO 70 −PEO 20 ) as a template and tetramethyl orthosilicate (TMOS) as a silica source. This work focuses on the investigation of its format…
Cancer chemotherapy is often complicated by toxic side effects of anticancer drugs. We are developing a new modality of tumor chemotherapy aimed at circumventing side effects of treatment via drug targeting to tumors. The technique is based on drug encapsulation in polymeric micelles followed by a controlled drug rele…
We describe and characterize a nanostructured metallic photonic crystal metamaterial which is magnetically active in the near-infrared region of the spectrum. The periodic array of modified split-ring resonator structures is numerically demonstrated to have a negative effective permeability at telecommunications wavel…
Unsymmetrical bolaamphiphiles, omega- [N-beta-D-glucopyranosylcarbamoyl] alkanoic acids, with even-numbered oligomethylene chains (12, 14, 16, 18, and 20 carbons) self-assembled in water to form lipid nano- and microtubes. The tubular assemblies were separated by centrifugation and examined by transmission electron mi…
The $γ-α$ transition in Ce$_{0.8}$La$_{0.1}$Th$_{0.1}$ is measured as a function of applied magnetic field using both resistivity and magnetization. The $γ- α$ transition temperature decreases with increasing magnetic field, reaching zero temperature at around 56 T. The magnetic-field dependence of the transition temp…
We study superfluid--solid zero-temperature transitions in two-dimensional lattice boson/spin models by Worm-Algorithm Monte Carlo simulations. We observe that such transitions are typically first-order with the exception of special high-symmetry points which require fine tuning in the Hamiltonian parameter space. We…
The development of a position control system for a shape memory alloy (SMA) wire actuator using an electrical resistance feedback is presented in this paper. A novel control scheme is implemented to eliminate the need for a position sensor to achieve stable and accurate positioning by utilizing the actuator's electric…
Studies of n-CdZnTe crystals (photoluminescence, extrinsic photoconductivity, Hall effect, time-of-flight technique) have shown that the excess concentration of vacancies of cadmium (Vcd) is the main reason of low, as a rule, values of product of mobility to life time of holes (mhth). The reduction of the concentratio…
We study the magnetic properties of metallic GaMnAs. We calculate the effective RKKY interaction between Mn spins using several realistic models for the valence band structure of GaAs. We also study the effect of positional disorder of the Mn on the magnetic properties. We find that the interaction between two Mn spin…
Devising a computational tool that assesses the thermodynamic stability of materials is among the most important steps required to build a ``virtual laboratory'', where materials could be designed from first-principles without relying on experimental input. Although the formalism that allows the calculation of solid s…
Araneoid spiders use specialized abdominal glands to produce up to seven different protein-based silks/glues that have diverse physical properties. The fibroin sequences that encode aciniform fibers (wrapping silk) and the mechanical properties of these fibers have not been characterized previously. To gain a better u…
Novel one-component phosphors, Cd 1 - x Dy x SiO 3, which emit white color long-lasting phosphorescence upon UV light excitation, are prepared by the conventional high-temperature solid-state method and their luminescent properties are systematically investigated in this paper. XRD, photoluminescence, long-lasting pho…
Abstract The mechanical properties of multiwall carbon nanotube (MWNT)/poly(methyl methacrylate) (PMMA) nanocomposites were studied as a function of nanotube orientation, length, concentration, and type. Orientation and dispersion were assessed by electron microscopy. A processing parameter study revealed the robust n…