Materials Literature
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The kinetics of the γ-radiolytical or chemical reduction of AuIII Cl4-, or of the combination of both methods, is followed as a function of the experimental conditions through the time evolution of the surface plasmon spectrum of the gold nanoparticles formed or of their sizes as observed by AFM imaging. It appears fr…
Large-amplitude negative holographic surface-relief gratings are optically induced by resonant visible exposure in azobenzene dye-containing polymers. We propose a simple diffusion model accounting for the essential dynamic features of surface-relief grating formation. It accounts for intensity and polarization depend…
Tool Steels, Fifth Edition provides tutorial explanations along with engineering data on the production, selection, and use of tool steels and related materials. The first six chapters cover topics of a general nature including tool steel classifications and selection factors, primary production processes, the effects…
Fire Retardancy of Polymeric Materials: Strategies Intumescence - Mechanism Studies New Intumescent Polymeric Materials Flame Retarded Intumescent Textiles Intumescence - an Environmentally Friendly Process? Subject Index.
A device for the electrostatic transport and manipulation of liquid droplets on a solid surface is described. Arrays of microelectrodes are fabricated on a substrate, which is covered by a hydrophobic layer. Water droplets, typically a microliter in volume, take spherical shape on the surface and are caused to move by…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTCarbon Nanotube Tips: High-Resolution Probes for Imaging Biological SystemsStanislaus S. Wong, James D. Harper, Peter T. Lansbury,, and Charles M. LieberView Author Information Department of Chemistry and Chemical Biology Harvard University, 12 Oxford Street Cambridge,…
The structure of dispersed liquid crystal droplets elasticity, surface tension, and surface anchoring. For sufficiently large droplets with radius R K / W a, where K is the bulk elastic constant and W a is the anchoring coefficient, the surface terms prevail. As a result, the equilibrium states of large droplets conta…
A novel variation of the template route to mesoporous silica is presented, which extends the range of pore sizes that can be achieved to larger sizes. Polymer latex particles in the range from 20 to 400 nm with different surface functionalities are employed as templates. The synthesis of the latices, sol-gel processin…
We present the crystal structures and magnetic properties of a series of magnetic compounds, MII{N(CN)2}2, where M=Cu (1), Ni (2), Co (3) and Fe (4), and [Mn{N(CN)2}2(C2H5OH)2]Z·(CH3)2CO (5). In the isostructural compounds 1–4, the dicyanamide anion is triply coordinating through its three nitrogen atoms. It bridges t…
The hydrolysis and polymerization of a non-catalyzed silica sol was investigated by Fourier Transform Infrared Spectroscopy (FT-IR) and deconvolution of the infrared spectra. The hydrolysis was followed by the 1168 and 812 cm−1 bands which have been observed that decrease continously with the reaction time, and they d…
The contraction of a collagen lattice by resident fibroblasts causes strains to be developed within that lattice. These strains can be increased or decreased by altering the aspect ratio (ratio of length/width/thickness) of the fibroblast populated collagen lattice, as the cross-sectional area resisting the strain is…
A self-assembled monolayer on a planar gold substrate has been used to initiate the living cationic ring-opening polymerization of 2-ethyl-2-oxazoline. The polymer chain end was functionalized with an alkyl moiety by means of the termination reaction in order to form an amphiphilic brush-type layer. The resulting laye…
The modification of silicas and related materials by attachment of organic functionalities to their surface is an important area of research in heterogeneous catalysis and green chemistry. The methods available for the preparation of these hybrid organic–inorganic materials are reviewed, as are their applications as c…
Superparamagnetic agents in magnetic resonance imaging: physico-chemical characteristics and clinical applications. Superparamagnetic agents have been the subject of extensive research over the last decade. They consist of iron oxide nanoparticles which are highly effective in Magnetic Resonance Imaging (MRI). The par…
This paper compares the information provided by X-ray diffraction and Raman spectrometry in terms of the structural order in a wide set of carbon solids. A special emphasis is placed in checking the validity of the commonly used formula of Tuinstra and Koenig and establishing the magnitude of errors potentially derive…
The molecular characteristics of the first five generations of poly(propyleneimine) dendrimers with two different types of end groups have been investigated using small-angle neutron scattering (SANS), viscosimetry, and molecular dynamics simulations. The dimension of the poly(propyleneimine) dendrimers, as measured b…
This article will briefly review the development of metallomacrocycle syntheses and consider the distinction between equilibrium controlled self-assembly processes and kinetically controlled, but metal directed, macrocycle formation reactions. The use of octahedral rather than square planar or tetrahedral metal coordi…
THEORY OF TA. Apparatus. Measuring Conditions and Mathematical Treatment. Transition Behavior. Chemical Reactions. Physical Parameters. TA DATA. Polymers. Foods. Pharmaceuticals. Organic Materials. Explosives. Inorganic Materials Metals. Appendix.
The high-strain-rate mechanical response of α-titanium is examined in terms of the underlying deformation mechanisms that govern its macroscopic behavior. The mechanical behavior of α-titanium has been evaluated using quasistatic (10−5 to 100 s−1) compression testing with servohydraulic machines, dynamic (10−2 to 104…
This study provided the first evidence for an antioxidant action of the silk protein sericin by showing that sericin suppressed in vitro lipid peroxidation. Furthermore, sericin was found to inhibit tyrosinase activity. These results suggest that sericin may be a valuable natural ingredient for food and cosmetic indus…