Materials Literature
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We demonstrate passive feedback cooling of a mechanical resonator based on radiation pressure forces and assisted by photothermal forces in a high-finesse optical cavity. The resonator is a free-standing high-reflectance micro-mirror (of mass m=400ng and mechanical quality factor Q=10^4) that is used as back-mirror in…
The quantum magnet NiCl$_2$-4SC(NH$_2$)$_2$ is a candidate for observing Bose-Einstein Condensation of spin degrees of freedom in applied magnetic fields. An XY antiferromagnetic ordered state occurs in a dome-shaped region of the temperature-field phase diagram between H$_{c1}$ = 2.1 T and H$_{c2}$ = 12.6 T and below…
Electronic structure codes usually allow to calculate the work function as a part of the theoretical description of surfaces and processes such as adsorption thereon. This requires a proper calculation of the electrostatic potential in all regions of space, which is apparently straightforward to achieve with plane wav…
We present a simple, robust and highly efficient method for optimizing all parameters of many-body wave functions in quantum Monte Carlo calculations, applicable to continuum systems and lattice models. Based on a strong zero-variance principle, diagonalization of the Hamiltonian matrix in the space spanned by the wav…
ADVERTISEMENT RETURN TO ISSUEPerspectiveNEXTPaclitaxel Prodrugs: Toward Smarter Delivery of Anticancer AgentsMariusz Skwarczynski, Yoshio Hayashi, and Yoshiaki KisoView Author Information Department of Medicinal Chemistry, Center for Frontier Research in Medicinal Science, 21st Century COE Program, Kyoto Pharmaceutica…
We have carried out first-principles calculation of Mg(0001) free-standing thin films to study the oscillatory quantum size effect exhibited in the surface energy, work function, interlayer relaxation, and adsorption energy of the atomic hydrogen adsorbate. The quantum well states have been shown. The calculated energ…
Abstract Cellulose derivatives of carboxymethyl cellulose sodium salt (CMC), hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), and enzymatically treated cellulose have been electrospun, and the microstructure of the resulting nanofibers has been analyzed by scanning electron microscopy (SEM). Before electros…
Electrochromic (EC) materials are able to change their optical properties, reversibly and persistently, by the application of an electrical voltage. These materials can be integrated in multilayer devices capable of modulating the optical transmittance between widely separated extrema. We first review the recent liter…
Ein bisschen Farbe ins Leben! An ein Donor-Acceptor-substituiertes Stilben gebundene Antikörper fluoreszieren stark im blauen und grünen Farbbereich. Photophysikalische und Strukturanalysen deuten an, dass die Bindung von Antikörpern die Eigenschaften der angeregten Zustände von Stilben verändert. Derartige Komplexe k…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
The Strategic National Stockpile (SNS) was developed by the Centers for Disease Control and Prevention (CDC) to deliver critical medical supplies to the site of a national emergency.1 Situations in which SNS might be deployed are during the release of biological or chemical weapons or during natural disasters. In thes…
Large-scale long continuous FeS(2) nanowire filled carbon nanotubes (CNTs) were one-step synthesized in the presence of NaN(3) in supercritical CS(2) at 500 °C using ferrocene as the iron source. The CNTs have outer diameters in the range of 15-25 nm and the core FeS(2) nanowires inside CNTs are characterized as singl…
Abstract The dynamics of the concentration fluctuations in end‐grafted polystyrene brushes in a theta solvent (cyclohexane) are probed by evanescent wave dynamic light scattering at different wavevectors q and temperatures. When the solvent quality changes from marginal to poor, the relaxation function C ( q , t ) exh…
Linear viscoelastic properties and dielectric behavior of poly(1‐butene)/multiwalled carbon nanotube (MWCNT) nanocomposites were investigated. Dynamic mechanical analysis showed significant increase in storage modulus in the rubbery regime. The tan δ peak temperature remained constant; however, the peak intensity was…
Abstract We present results on the use of ellipsometry as a novel probe for the crystallization kinetics in thin films of a diblock copolymer. Ellipsometry makes use of the change in polarization induced upon the reflection of light from a film‐covered substrate to enable the calculation of the refractive index and th…
The compressive creep characteristics at 1625°C of liquid‐phase‐sintered silicon carbide ceramics containing 5 and 15 wt% of crystalline Y 3 Al 5 O 12 (YAG) as the secondary phase were studied. In the two cases, strains between 10% and 15% were reached without failure. The creep behavior was characterized by a stress…
Synthetic routes leading to the first polyhedral oligosilsesquioxane derivatives incorporating niobium are reported. Tetrasilanol ( c -C 6 H 11 ) 6 Si 6 O 7 (OH) 4 ( 2 ), for which an improved laboratory-scale synthesis is reported, cleanly reacts with Nb(OEt) 5 to afford the dinuclear niobasilsesquioxane [( c -C 6 H…
The alumina–zirconia (Al 2 O 3 –ZrO 2 ) system is considered as one of the most useful nanocomposites, finding widespread applications in structural field. To provide optimal performance, the scale reduction of the initial powder or of the final grain morphology is of particular importance. To accomplish this, we deve…
The occurrence of air-trapping inside poly-eta-caprolactone nanopits was investigated by measuring the contact angles of water droplets on a set of defined nanotopographies. It is shown that the advancing angles follow the Cassie-Baxter theory, thus revealing the presence of air bubbles inside the biodegradable nanopa…