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。
Quartz grains from the McArthur River uranium deposit of the Athabasca Basin, Saskatchewan, are characterized by three distinct types of cathodoluminescence (CL): 1) halos surrounding U- and Th-bearing mineral inclusions, and 2) patches and 3) continuous rims along grain boundaries and fractures. These three types of…
Ultrasuperpara magnetic iron oxide (USPIO) nanoparticles were synthesized with iron chloride using a sonochemical method. The size of the USPIO nanoparticles was controlled by ultrasonic exposure time and power. The USPIO nanoparticles had a narrow size distribution, a perfect magnetite crystal structure, and high sat…
In the last decade, there have been several investigations into the route by which a polymer melt that has been subjected to flow transforms into a crystalline state. Crystallization of polymers from flowing or stressed melts is a technologically important problem since most thermoplastics are subjected to intense flo…
Superparamagnetic /spl gamma/-Fe/sub 2/O/sub 3/(Au) core(shell) nanoparticles with narrow size distribution and different shell thicknesses are synthesized. On conjugation with serum albumin, this set of particles forms an ideal candidate to be used in magnetic targeted drug delivery and hyperthermia treatment. In thi…
Movement of biofilm into the suspended state as a result of erosion and sloughing is inevitable. The causes for this have been widely attributed to the presence of high shear stress, excess nutrients or a combination of both parameters. It is believed that the extracellular polymeric substances (EPS) of biofilm contri…
Measurements using a fiber-optic probe hydrophone, high-speed camera, and B-mode ultrasound showed attenuation of the trailing negative-pressure phase of a lithotripter shock pulse under conditions that favor generation of cavitation bubbles, such as in water with a high content of dissolved gas or at high pulse repet…
In this paper, the physics that determines the performance limits of a diffractive optical element based on a liquid-crystal (LC) optical phased array (OPA) is investigated by numerical modeling. The influence of the fringing electric fields, the LC material properties, and the voltage optimization process is discusse…
A circular braiding process is adapted to produce three-dimensional shapes by braiding over a contoured mandrel. The present work deals with the simulation of various braided structures. The simulated structures are based on geometrical models developed for yarns on different shapes of mandrels. The geometry of a brai…
Electrostatic interactions drive the adsorption of polycationic single-molecule magnets onto anionic monolayers self-assembled on gold surfaces. Well-isolated magnetic clusters have been deposited and characterized using scanning tunneling microscopy and X-ray photoemission spectroscopy.
Abstract The influence of clay preparation procedure on sorption and hydrolysis of carbaryl (1-naphthyl, A-methyl carbamate) by the reference smectite SWy-2 was examined. For research purposes, reference clays are sometimes used without purification, or more commonly, the <2 μm size fraction is obtained by gravity…
The chemical state and local environment of sulfur in basaltic glasses from the eastern Galapagos rift and quenched laboratory experiments have been investigated by synchrotron-radiation S K-edge X-ray absorption near-edge structure (XANES) spectroscopy, using an energy-selective fl uorescence detector. We have also i…
Size-controlled gold nanocrystals were conveniently synthesized through direct electroreduction of bulk AuCl(4)(-) ions in the presence of poly(N-vinylpyrrolidone) (PVP). PVP greatly enhanced the gold particle formation process and also significantly retarded the gold electrodeposition process, allowing the electroche…
A computational model is developed to predict the ferroelastic and ferromagnetic domain structures in ferromagnetic shape-memory alloys by combining the phase-field approach, micromagnetics and the microelasticity theory of Khachaturyan [Theory of Structural Transformations in Solid (Wiley, New York, 1983)]. As an exa…
The selectivity of anticancer drugs in targeting the tumour tissue presents a major problem in cancer treatment. In this article we review a new generation of smart liposomal nanocarriers that can be used for enhanced anticancer drug and prodrug delivery to tumours. The liposomes are engineered to be particularly degr…
BACKGROUND AND PURPOSE: Iron oxide-based contrast agents have been investigated as more specific MR imaging agents for central nervous system (CNS) inflammation. Ferumoxtran-10 is a virus-size nanoparticle, taken up by reactive cells, that allows visualization of the phagocytic components of CNS lesions. Ferumoxtran-1…
Alessandra Ambruosia, Hiromitsu Yamamotob & Jörg Kreuteraa Johann Wolfgang Goethe-Universität, Institut für Pharmazeutische Technologie, Marie-Curie-Straße 9, D-60439, Frankfurt am Main, Germanyb Gifu Pharmaceutical-University, Laboratory of Pharmaceutical Engineering, 5-6-1 Mitahora-higashi, 502-8585, Gifu, JapanInst…
We report on the magnetic properties of CuO nanoparticles prepared by the sol-gel method. M (T) curves show a blocking temperature at T/sub B/=135 K and 160 K for 13 nm and 17 nm size particles, respectively, in measuring field H=100 Oe. The M-H data for both the samples show a reversal magnetization at 300 K, whereas…
Over the past half-decade, the fundamental physical properties of left-handed(LH) metamaterials (MMs) have been established both theoretically and experimentally,and several novel MM-based microwave applications with unique characteristics have already been proposed. This paper provides a recall of the main properties…
Ce-doped borosilicate (BSG), phosphosilicate (PSG), and borophosphosilicate (BPSG) glasses (B:P:Si molar ratios 8:0:92, 0:8:92, and 8:8:84; Ce:Si molar ratio 1 x 10(-)(4) to 1 x 10(-)(2)) were prepared by the sol-gel method. High-resolution transmission electron microscopy (HRTEM), (31)P, (29)Si, and (11)B magic angle…
Surface effects significantly influence the functionality of semiconductor nanocrystals. A theoretical understanding of these effects requires an atomic-scale description of the surface. We present an atomistic tight-binding theory of the electronic and optical properties of passivated and unpassivated CdS nanocrystal…