Materials Literature
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The segmental dynamics of amorphous poly(dimethylsiloxane) (PDMS) in a lamellar poly(styrene)−poly(dimethylsiloxane) diblock (PS−PDMS) is investigated by means of broadband dielectric spectroscopy. Because of the absence of normal mode in PDMS, we have been able to analyze the low-frequency side of the α-relaxation in…
ADVERTISEMENT RETURN TO ISSUECommunicationNEXTFormation of Helical Hybrid Silica BundlesYonggang Yang, Miho Nakazawa, Masahiro Suzuki, Mutsumi Kimura, Hirofusa Shirai, and Kenji HanabusaView Author Information Department of Functional Polymer Science, Faculty of Textile Science and Technology, Shinshu University, Ueda…
A mesostructured hollow sphere form of carbon can be synthesized by using mesocellular foam (MCF) silica as template. A carbon structure composed of spherical hollows with closed walls and with mesopores of around 4 nm in diameter was prepared by the two-step impregnation of sucrose and successive carbonization under…
A rigid body boundary layer interface force (RIF) model for stress calculation on the nanoscale is proposed in this paper for calculating stress based on molecular dynamics. The RIF model is used to study the stress–stain behaviour when nanoscale single crystal copper is under uniaxial tension, and is used for 15 tens…
The scattering function for Schulz–Flory distributed spherical core–shell particles is derived analytically. A constant ratio of core to shell radii is assumed. The analytical expression, which does not require any numerical integration, provides a fast way to model experimental data by nonlinear least-squares fitting…
Abstract Single-crystalline CuO nanoleaves with an average thickness of about 10 nm and with lateral sizes of hundreds of nanometers to several micrometers have been successfully synthesized by microwave-heating of an aqueous solution containing copper salt and sodium hydroxide. CuO nanoleaves were characterized by po…
By using Monte Carlo simulations in the grand canonical ensemble we investigate the bulk phase behaviour of a model colloid–polymer mixture, the so-called Asakura–Oosawa model. In this model the colloids and polymers are considered as spheres with a hard-sphere colloid–colloid and colloid–polymer interaction and a zer…
In a previous study, we have reported chemical synthesis of novel aliphatic poly(butylene succinate-co-cyclic carbonate) P(BS-co-CC)s bearing various functionalizable carbonate building blocks, and this work will continue to present our new studies on their enzymatic degradation and in vitro cell biocompatibility assa…
We present the non-equilibrium phase diagram of rod-like colloids ( fd -viruses) under shear flow. The shear-induced displacement of the isotropic–nematic binodal is obtained from time resolved rheology measurements. Vorticity banding is observed within the biphasic region, as bounded by the binodal. Here, in the stat…
Two families of misfit cobalt oxides have been reinvestigated using neutron and synchrotron powder diffraction data and Rietveld structure refinements in the four-dimensional formalism for aperiodic structures. In the first system [Ca 2 CoO 3 ][CoO 2 ] 1.62 , the structure-specific features of two complex polytypic ph…
A Vps10p domain makes up the entire luminal part of Sortilin, and this type of domain is the hallmark of a new family of neuronal receptors that target a variety of ligands, including neurotrophins and neuropeptides. We have shown that two structural features of the Vps10p domain, the N-terminal propeptide and the C-t…
A mixed oxidation-state (Rh24+ and Rh25+) compound, [{Rh2(acam)4}2I]n.6nH2O (Hacam = acetamide), has been synthesized. The compound has a nonpenetrating diamondoid arrangement of {Rh2(acam)4} units linked by mu4-iodides. All of the dirhodium units are crystallographically equivalent, as are all of the iodide atoms. Th…
We report here the formation of high surface area silicon carbide materials comprising whiskers and nanotubes via a synthesis route, which utilizes mesoporous silica as sacrificial solid template. The silicon carbide materials are obtained via carbothermal reduction of mesoporous silica/carbon (i.e., SBA-15/sucrose) c…
A novel family of highly functionalized molecules consisting of a central 4-methyl-3,5-diacylaminobenzene platform linked in close proximity to the methyl group by two lateral aromatic rings each equipped with two long alkoxy chains has been rationally designed. The presence of amide tethers and a chelating phenanthro…
The dispersion of cubic nonlinearity in the organometallic dendrimer 1,3,5-(3,5-{trans-[(dppe)2(4-O2NC6H4CC)RuCC]}2C6H3CCC6H4-4-CC)3C6H3 can be understood in terms of an interplay of two-photon absorption and absorption saturation. Simple dispersion relations reproduce the behavior of both the real and imaginary compo…
The ability of Keggin-type phosphododecamolybdates (PMo 12 O 40 3 - ) to undergo chemisorption and to form anionic monolayers on platinum surfaces is explored here to produce stable colloidal solutions of polyoxometalate-protected platinum nanoparticles (size, 5−10 nm, as determined by transmission electron microscopy…
Centimeter scale aligned carbon nanotube arrays are grown from nanoparticle/metal catalyst pads. We find the nanotubes grow both “with” and “against the wind”. A metal underlayer provides in situ electrical contact to these long nanotubes with no post growth processing needed. Using the electrically contacted nanotube…
Transition metal heteropolyanions have been used to catalyze a variety of organic oxidations but have not previously been used for O2 generation, despite sharing some structural similarities with dioxoruthenium water-oxidation catalysts. In this study, we report that the di-Ru-substituted polyoxometalate (POM) [Ru2Zn2…
We have studied some of the rheological properties of suspensions of hard-sphere colloids with particular reference to behaviour near the concentration of the glass transition. First we monitored the strain on the samples during and after a transient step stress. We find that, at all values of applied step stress, col…
This study reports the synthesis and in vitro biological properties of dendrimer-antibody conjugates. The polyamidoamine dendrimer platform was conjugated to fluorescein isothiocyanate as a means to analyze cell binding and internalization. Two different antibodies, 60bca and J591, which bind to CD14 and prostate-spec…