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。
The direct foaming of preceramic polymer mixtures, followed by high temperature pyrolysis in an inert atmosphere, can be employed to fabricate ceramic foams with impressive strength, stiffness, thermome-chanical and thermochemical durability, and electromagnetic properties. Flexural strength and stiffness were superio…
Stress-induced crystallization, orientation, and crystallinity have been measured by X-ray diffraction around cracks in a cis- 1,4-polyisoprene sample drawn at low ratio, λ < 3.5. A zone of maximum crystallinity and a transition zone of varying crystallinity are observed; the dimensions of these semicrystalline zones…
Abstract Visible to near-infrared (NIR) reflectance spectra and mid-IR transmittance spectra are presented here for a collection of dioctahedral smectites. Analysis of the structural OH vibrations is performed by comparing the NIR combination and overtone bands with fundamental stretching and bending absorption featur…
Abstract Alumina/polymethylmethacrylate (PMMA) nanocomposites were produced by incorporating alumina nanoparticles, synthesized using the forced gas condensation method, into methylmethacrylate. The particles were dispersed using sonication and the composites were polymerized using free radical polymerization. At an o…
We report new experimental results on granular compaction under consecutive vertical taps. The evolution of the mean volume fraction and of the mean potential energy of a granular packing presents a slow densification until a final steady state, and is reminiscent of usual relaxation in glasses via a stretched exponen…
Glass ceramics are a known class of polycrystalline ceramic materials, where, depending on the glass matrix and the particular crystalline phases, one can obtain materials with improved mechanical, thermal, electrical or optical properties. The characteristics and applications of optical glass ceramics are reviewed, w…
Rare-earth-doped optical amplifiers have a great potential for broadband Wavelength-Division-Multiplexed (WDM) telecommunication by tailoring host glass compositions. In order to design the emission spectra of doped rare-earth ions, it is important to understand the relationship between the local ligand field and vari…
Electromigration studies on Cu interconnects are reviewed. Some history and more recent results are discussed along with a description of the present interpretations of the active mass transport mechanisms involved in Cu electromigration. The issue of the dual-damascene process and its potential effect on EM reliabili…
In this paper we report on the effect of surface wettability on surface selection and adhesion properties of settled (adhered) spores of the biofouling marine alga Enteromorpha and cells of the diatom Amphora, through the use of patterned self-assembled monolayers (SAMs). The SAMs were formed from alkanethiols termina…
Abstract Most polymer blends are immiscible and need to be compatibilized. The compatibilization must accomplish: (i) optimization of the interfacial tension; (ii) stabilize the morphology against high stresses during forming; and (iii) enhance adhesion between the phases in the solid state. Compatibilization is accom…
This volume concentrates on the use of spectroscopic microscopy in the measurement of electrical and optical properties of nanostructures.This is of increasing importance in advanced research and the development of fabrication technologies for semiconductor nanostructures.Chapters deal with electron beam probe spectro…
Tumor vessels possess unique physiological features that might be exploited for improving drug delivery. In the present study, we investigate the possibility of modifying polyethylene glycol-ylated liposome cationic charge of polyethylene glycol coated liposomes to optimize delivery to tumor vessels using biodistribut…
The Glass Transition: Relaxation Dynamics in Liquids and Disordered Materials , E. Donth Springer-Verlag, New York, 2001. $99.00 (418 pp.). ISBN 3-540-41801-6 Buy at Amazon
Mussels owe their sessile way of life in the turbulent intertidal zone to adaptive adjustments in the process and biochemistry of permanent attachment. These have understandably attracted scientific interest given that the attachment is rapid, versatile, tough and not subverted by the presence of water. The adhesive p…
Abstract SHELXE was designed to provide a simple, fast and robust route from substructure sites found by the program SHELXD to an initial electron density map, if possible with an indication as to which heavy-atom enantiomorph is correct. This should be understood as a small contribution to high-throughput structural…
This Account focuses on the most recent and systematic efforts in the area of functionalization chemistry of the single-wall carbon nanotubes (SWNTs) which utilizes direct fluorination for the preparation of "fluoronanonotubes" and their subsequent derivatization. The results obtained prove that the addition of fluori…
column 1, line 14: "fuels and materials" should read "organic fuels and materials."Page 529, Table 4, line 10: "smithiti" should read "smithii."Page 530, column 2, line 5 from bottom: reference 651 should be deleted.Page 531, Table 5, Binding affinity: for CenA BMCC, "41" and "1.89" should read "8.6" and "0.40," respe…
Abstract Carbon nanotubes are attractive new materials. It has been about a decade since carbon nanotubes were discovered. Carbon nanotubes have many outstanding properties and have many practical or potential applications. In this short review we introduce recent advances in carbon nanotubes as potential material for…
Recent demonstrations of negative refraction utilize three-dimensional collections of discrete periodic scatterers to synthesize artificial dielectrics with simultaneously negative permittivity and permeability. In this paper, we propose an alternate perspective on the design and function of such materials that exploi…
The title complex, (nBu4N)+[(HCPz3)Ce(NO3)4]− or (C16H36N)[Ce(NO3)4(C10H10N6)], which is the first lanthanide(III) complex of tris(pyrazolyl)methane (HCPz3), is 11-coordinate. The Ce—O and Ce—N bond lengths are in the ranges 2.514 (3)–2.685 (3) and 2.686 (4)–2.761 (4) Å, respectively.