Materials Literature
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Fluid filaments with diameters of several micrometers and large aspect ratios can be prepared from some layered liquid crystalline phases of organic bent-core mesogens. An internal structure stabilizes them against the Rayleigh-Plateau instability, but the filament material can flow freely along their axis. In equilib…
Polysilsesquioxane having an ethoxysulfonyl group as a side chain was synthesized to prepare a proton-conductive film composed of a main chain of siloxane. At first, sodium 4-(2-methylallyloxy)benzenesulfonate was chlorinated with thionyl chloride. Next, hydrosilylation with trichlorosilane was carried out in the pres…
Metallic pressure tanks used in space missions are inherently vulnerable to hypervelocity impacts from micrometeoroids and orbital debris; thereby knowledge of impact damage and its effect on the tank integrity is crucial to a spacecraft risk assessment. This paper describes tests that have been performed to assess th…
We have studied the spreading and retraction dynamics of a dye doped smectic multilayer domain in the collapsed state of a Langmuir monolayer at the air–water interface. We find that the domain undergoes shearing when excited with an appropriate wavelength in the epifluorescence setting of the microscope. The shearing…
A hybrid magnesium alloy nanocomposite containing AlN nanoparticle reinforcement was fabricated using solidification processing followed by hot extrusion. The nanocomposite exhibited similar grain size to the monolithic hybrid alloy, reasonable AlN and intermetallic nanoparticle distribution, nondominant (0 0 0 2) tex…
Luminescence of lanthanides is attractive for biological applications due to its long lifetime and sharp emission profiles. We describe the split display of a lanthanide binding ligand that allows facile evaluation of dimerizing proteins. The split lanthanide ligand is cysteine reactive, and therefore should be readil…
The Neutralization layer for Directed self-assembly (DSA) was quickly formed by using polystyrene-polymethylmethacrylate random copolymer (PS-r-PMMA) immobilized by two different kinds of reactive self-assembled monolayers (SAMs). Two different kinds of reactive SAMs, one was photo-reactive and the other was thermal r…
Arrays of hybrid single/poly-crystalline ZnO nanoawls (HSP-ZNAs) composed of single-crystalline ZnO nanorod (ZNR) holders and poly-crystalline nanoneedles were for the first time fabricated via a facile two-step synthesis strategy that was based on firstly an aqueous electrodeposition and secondly an aqueous chemical…
Electrodeposition of Co-rich Co-Pt alloys from an alkaline amino-nitrite/citrate/glycinate electrolyte is found to depend strongly on the addition of Na-hypophosphite (Na-Hp) in the electrolyte. The presence of Na-Hp shifts alloy deposition to more negative potentials, decreases the partial current for Co deposition,…
AIM: To assess the efficacy and safety of the combination of pegylated liposomal doxorubicin (PLD) and carboplatin in patients with recurrent epithelial ovarian carcinoma (ROC), following disease progression on single agent PLD. METHODS: An analysis of the medical records of 10 patients with ROC, treated in our instit…
We demonstrate the ability of the reversible addition-fragmentation chain transfer (RAFT) process to produce well-defined oligomers of n -butyl acrylate ( n BA) and styrene (St) of narrow molecular weight distribution (i.e., Đ s ≤ 1.2) and degrees of polymerization (DPs) ranging from 9 to 27. We use these oligomers to…
In the paper, the possibility of achieving negative permeability for two-component metamaterials is analytically proven. The metamaterial media are presented as an infinite host dielectric material (air) with periodically embedded ferric cylindrical and spherical inclusions saturated with a biasing external magnetic f…
摘要：
We evaluated the strength of a cast non-combustible magnesium alloy that is intended for use in automobile engines.This alloy contains thin sheet-like oxides because of its production process.The size of these thin sheet-like oxides varies, and this means that the temperature dependency of the strength characteristics…
Influences of Bi addition on microstructures and damping capacities of Mg2Si/Mg–Al–Si–(Bi) composites have been investigated. The Bi addition is beneficial to modify Mg2Si phase from coarse Chinese script shape to fine polygonal shape. Even though the Bi-containing alloy has modified polygonal Mg2Si compounds, its dam…
Multi-walled carbon nanotube (MWNT) paper was surface modified with gaseous oxygen and chlorine atoms, and analyzed by X-ray photoelectron spectroscopy (XPS). The oxygen atoms were produced by a low-pressure microwave (MW) plasma discharge of an Ar–O2 mixture and the results were compared to a previous study using VUV…
Boiling water reactor (BWR) bottom reflector calculations in lattice codes such as CASMO are presently used only to produce accurate boundary conditions for core interfaces in nodal diffusion codes. Homogenized cross-section constants and discontinuity factors are calculated in one dimension (1-D) without the explicit…
Hypoxanthine (HYP) has been evaluated as a corrosion inhibitor for mild steel in aerated 0.1 M hydrochloric acid by weight loss, potentiodynamic polarisation and electrochemical impedance spectroscopy techniques at 30 and 60 °C respectively. The results showed that hypoxanthine is a moderate inhibitor in the acidic me…
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2012.
This jointed system using specialized screws, called large diameter bolts, is one of the moment resisting joint systems. This system is characterized by cutting an internal thread directly to wood, by threading a large diameter bolt into the wood. In this study, the tensile behavior of these large diameter bolts embed…