Materials Literature
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Voltammetry of vinylferrocene (VFc)-immobilized polystyrene(PS)-based latex particles was carried out in aqueous suspensions by changing the size of latex particles in order to investigate the dependence of the electroactivity of the particles on their size. The anodic peak current was controlled by diffusion of the l…
In this Letter, we report on the motion of water droplets on surfaces decorated with molecular gradients comprising semifluorinated (SF) organosilanes. SF molecular gradients deposited on flat silica substrates facilitate faster motion of water droplets relative to the specimens covered with an analogous hydrocarbon g…
Interference effects between velocity and density of states, which occur as electrons move along open orbits in the extended Brillouin zone in anisotropic conductors, result in a change of wave functions' dimensionality at magic angle (MA) directions of a magnetic field. In particular, these $1\mathrm{D}\ensuremath{\r…
Polymorphism-the phenomenon that a given compound forms more than one crystalline arrangement of the molecules in the solid state- plays a crucial role in understanding organic conductors, superconductors, and magnets. We have found that solutions of a new phenalenyl radical can give rise to two (nonpolymorphic) cryst…
Pseudomonas aeruginosa ATCC 27853 accumulated poly(3-hydroxyalkanoates) (PHAs) after growth on saturated fatty acids with an odd number of carbon atoms. No nutrient limitation was required to induce PHA synthesis, although better yields were obtained when the medium was magnesium deprived. A comparative study was carr…
An accurate description of a columnar liquid crystal of hard disks at high packing fractions is presented using an improved free-volume theory. It is shown that the orientational entropy of the disks in the (one-dimensional) fluid direction leads to a different high-density scaling pressure compared to the prediction…
Electron beam- (EB-) induced graft polymerization of acrylic acid and the subsequent immobilization of arginine-glycine-aspartic acid (RGD) peptide onto nanopatterned polycaprolactone with parallel grooves is reported. A high concentration of carboxylic groups was introduced onto the polymer substrate by EB-induced po…
An automated approach for rapid on-line monitoring of the solid and liquid phases present in bioprocesses based on mid-IR Fourier transform spectrometry is introduced. The principles of this new approach are presented using the example of the quantitative and qualitative analysis of poly(beta-hydroxybutyric acid) (PHB…
Abstract Diblock copolymers consisting of methoxy poly(ethylene glycol) (MPEG) and poly(ϵ‐caprolactone) (PCL), poly(δ‐valerolactone) (PVL), poly( L ‐lactic acid) (PLLA), or poly(lactic‐ co ‐glycolic acid) (PLGA) as biodegradable polyesters were prepared to examine the phase transition of diblock copolymer solutions. M…
Positive and negative ions generated by laser-based ionization methods from three gold:thiolate cluster compounds are mass analyzed by time-of-flight mass spectrometry. The three compounds have similar inorganic core masses ( approximately 29 kDa, approximately 145 Au atoms) but different n-alkanethiolate ligands asso…
A theory of isothermal structural relaxation and creep of glasses below the glass transition temperature is given. According to the interstitialcy theory, the supercooled liquid state does not exist below a Kauzmann ``pseudocritical'' temperature ${T}_{k}$, which lies above the temperature ${T}_{K}$, commonly called t…
Abstract For the first time, hollow PbTe nanospheres with diameters of 80−140 nm have been prepared in an ether/glycerol microemulsion system and PbTe single‐crystalline nanotubes with diameters of 60−80 nm have been synthesised in a homogeneous ethanol/glycerol system. They can be facilely controlled via a solvotherm…
This review summarizes the recent progress in experimental determination of electron densities in inorganic crystals and its contribution to our understanding of bonding and density functional approximations. The experimental techniques for electron density mapping are presented, including the accurate measurement of…
Thin films of graft copolymers consisting of poly(N-isopropylacrylamide) (PNiPAAm) or poly(N,N-diethylacrylamide) (PDEAAm) as polymer backbone and poly(ethyleneglycol) as side chains were cross-linked on fluoropolymer substrates by low-pressure plasma treatment. All immobilized polymers exhibit a lower critical soluti…
Abstract A new method was developed for preparing polystyrene‐functionalized multiple‐walled carbon nanotubes (MWNTs) through the termination of anionically synthesized living polystyryllithium with the acyl chloride functionalities on the MWNTs. The acyl chloride functionalities on the MWNTs were in turn obtained by…
The synergetic effect in multicomponent catalysts is a topic of profound industrial importance and intense academic interest. On a newly identified multicomponent catalyst, $\mathrm{A}\mathrm{u}/\mathrm{I}\mathrm{r}{\mathrm{O}}_{2}/\mathrm{T}\mathrm{i}{\mathrm{O}}_{2}$, first-principles density-functional theory is an…
Structures of modular supramolecular architectures consisting of a hexameric, diphenylethyne-linked porphyrin macrocyclic array and the corresponding host-guest complex formed by inclusion of a tripyridyl guest molecule were characterized in solution using high-angle X-ray scattering. Scattering measurements made to 6…
In this work we review our present understanding of superconductivity in Magnesium Diboride from the theoretical perspective as it evolves from band structure calculations. Particular emphasis is placed on two gap superconductivity. Some of its peculiar consequences are discussed, in particular upper critical field an…
In a recent paper [Ferrari et al., Phys. Rev. E 69, 035102(R) (2004)], the scaling law of the fluctuations of the step limiting a crystal facet has been computed as a function of the facet size. Ferrari et al. use rigorous, but physically rather obscure, arguments. Approaching the problem from a different perspective,…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTRole of the Surface in Luminescent ProcessesBillie L. Abrams and Paul H. HollowayView Author Information Sandia National Laboratories, P.O. Box 5800-1421, Albuquerque, New Mexico 87185, and Department of Materials Science and Engineering, University of Florida, P.O. Box 116400,…