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。
We show that a simple Ginzburg-Landau type theory can predict a tremendous rich "zoo" of diblock copolymer morphologies in cylindrical nanopores. Using the cell dynamics simulation we study in detail lamellar-, cylinder-, and eventually sphere-forming diblock copolymers melts in cylindrical nanopores. A very fast simu…
Relativistic density functional theory calculations have been conducted to examine the effect of atomic under-coordination on the crystal structure, binding energy, and electron configuration of cuboctahedral and Marks decahedral gold clusters. Trend consistency between calculations and experimental observations confi…
We present the realization of a novel three-terminal electronic switch using phase-change (PC) chalcogenide material. This device subdivides a single PC switch into a parallel array of three-terminal subvias which are addressed with atomic-force-microscopy cantilever probes. This subdivision reduces the required switc…
Zwei in Einem: Ein periodisches mesoporöses Phenylenkieselgel (PMO) mit sauren Wänden und basischen Poren wurde durch Anwendung von Schutzgruppentechniken synthetisiert. Auf diese Weise konnte eine präzise Lokalisierung der Säuregruppen in den hydrophoben Phenylenschichten und der Aminogruppen an den hydrophilen Kiese…
Environmental and health studies on nanomaterials are appearing in the literature at a rapid pace. These studies will address important issues related to the environmental health and safety (EHS) of nanomaterials. As noted in many recent workshop and agency reports, studies devoted toward the environmental fate and tr…
This letter derives a closed-form analytical approximation of the output harmonic spectrum of a single-phase two-level inverter under the action of hysteresis current control. The analytical approach consists of first describing the error current as a triangular signal of variable duty cycle and frequency, and subsequ…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTEffect of Matrix Molecular Mass on the Crystallization of β-Form Isotactic Polypropylene around an Oriented Polypropylene FiberXiaoli Sun†, Huihui Li†, Xiuqin Zhang‡, Dujin Wang‡, Jerold M. Schultz§, and S. Yan*†View Author Information† State Key Laboratory of Chemical Resource…
Multiwalled carbon nanotubes (MWCNTs) and metal oxide composites, including MWCNTs@SnO 2, MWCNTs@ZrO 2, MWCNTs@Fe 2 O 3, as well as corresponding metal oxides (MO) hollow structure consisted of SnO 2, ZrO 2, or CeO 2 metal oxide single crystals, respectively, are produced using porous carbonaceous coating and multiwal…
Control over crystal growth by acidic matrix macromolecules is an important process in the formation of many mineralized tissues. Highly acidic macromolecules are postulated intermediates in tissue mineralization, because they sequester many calcium ions and occur in high concentrations at mineralizing foci in distant…
Bacillus anthracis is a gram-positive spore-forming bacterium that causes anthrax. With the increased threat of anthrax in biowarfare, there is an urgent need to characterize new antimicrobial targets from B. anthracis. One such target is dihydrodipicolinate synthase (DHDPS), which catalyzes the committed step in the…
The electronic properties of PbSe quantum dots containing a nonstoichiometric Pb:Se ratio are investigated by ab initio density functional theory. We take five nearly spherical PbSe nanocrystals with effective diameters ranging from 11.22 to 31.86 Å into account and compare their electronic properties before and after…
We report studies on magnetization dynamics in NiO nanoparticles of average size 5 nm. Temperature and time dependence of dc magnetization, wait time dependence of magnetic relaxation (aging) and memory phenomena in dc magnetization are studied with various temperature and field protocols. We observe that the system s…
The intramolecular interactions responsible for the planarity observed in poly(3,4-ethylenedioxythiophene) and small 3,4-ethylenedioxythiophene-containing oligomers have been investigated using quantum mechanical methods. Specifically, the relative influence of electron-donating effects, pi-conjugation, and geometric…
The synthesis, characterization, and some properties of new glutathione-mediated biodegradable sugar-based copolyurethanes are described. These copolyurethanes were obtained by polyaddition reaction of mixtures of 2,2'-dithiodiethanol (DiT) and 2,3,4-tri-O-benzyl-L-arabinitol (ArBn) or 2,3,4-tri-O-methyl-L-arabinitol…
The inhomogeneity of as-grown single-walled carbon nanotubes (SWCNTs), in terms of chiral structure, is a major obstacle to integration of these novel materials in advanced electronics. While separation methods have circumvented this problem, current synthesis approaches must be refined for large-scale production of S…
Multipodal nanoparticles (NPs) with controlled tethers are promising principal building blocks, useful for constructing more complex materials, much like atoms are connected into more complex molecules. Here we report colloidal sphere templating as a viable means to create tetrapodal NPs with site-specific tethers. Am…
In this work, poly(3-hydroxybutyrate- co -3-hydroxyvalerate) (PHBV)/bamboo pulp fiber composites were melt-compounded and injection-molded. Tensile, impact and dynamic mechanical properties of the composites were studied. In contrast to many other short natural fiber reinforced biocomposites which demonstrate decrease…
Dye is coabsorbed with CdSe nanocrystals (see image), strongly increasing the amount of charge injected into TiO2 from CdSe nanocrystals and providing an additional degree of control over the electron charge-transfer process. This could have important implications in the development of supracollectors with enhanced ab…
A series of heterobimetallic 3d-4f cluster coordination compounds has been synthesized using a Schiff-base ligand (H(3)L), a trinuclear iron(III) precursor complex and lanthanide nitrates as reactants. Five new isostructural complexes were prepared with the ligand in 4 different forms, i.e., neutral and 3 different le…
We have successfully immobilized phosphotungstic acid (PTA), a polyoxometalate, on the surface of boron-doped diamond (BDD) surface through electrostatic self-assembly of PTA on pyridinium dye-functionalized-BDD. The inorganic/organic bilayer structure on BDD is found to exhibit fast surface-confined reversible electr…