Materials Literature
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The catalytic wet oxidation of lactose to carbon dioxide/water and to a value-added product, lactobionic acid, has been demonstrated in a flow reactor. Lactose (milk sugar) is a low value byproduct of the dairy industry and makes up the largest part of the solids in cheese whey. Costs associated with cheese whey dispo…
Six new aminoalkylsulfanyl polythiophenes (PTs), namely PTNHBoc, PTNMeBoc, PTNH 2, PTNHMe, PTNMe 2, and PTN + Me 3, were synthesized. Four of them were obtained through Stille coupling, whereas PTNH 2 and PTNHMe were obtained through deprotection via N -Boc precursors. The solubility changes going from the protected a…
For antitumor drugs with an intracellular action site in the nucleus, effective internalization of the drugs into cancer cells and accumulation in the nucleus should be the determinant step for high antitumor activity. We synthesized a novel chitosan derivative by grafting stearic acid onto chitosan. The derivative ca…
Abstract We recently showed, using tight‐binding calculations, that nonequilibrium valley polarization can be realized in graphene, when the current is injected through a “valley filter”: a ballistic point contact with zigzag edges. Here we demonstrate that the effect is surprisingly robust against changing the crysta…
A series of BaTiO 3 –MgO–glass mixtures has been sintered via liquid‐phase sintering in a reducing atmosphere at 1280°C by controlling MgO/CaO ratio in an aluminum borosilicate glass composition, and the subsequent microstructure, phase evolution, and dielectric properties have been investigated. The growth of BaTiO 3…
This paper presents an adaptive multiscale simulation of deformations of curved crystalline structures such as carbon nanotubes (CNTs). It is based on quasicontinuum approach, which is a coarse-graining method. For fully nonlocal quasicontinuum, high-order interpolation functions are adopted to locate the deformed pos…
A chemical liquid-phase deposition method is used to synthesize perpendicularly branched nanotripods on substrates through continuous replenishment of nutrients into solution. A good control in crystal growth from oriented tripods to faceted crystals has been achieved, and more complex nanostructures are expected to b…
The wetting behavior of thin films of $4\mathrm{\text{\ensuremath{-}}}n\mathrm{\text{-octyl-}}{4}^{\ensuremath{'}}\mathrm{\text{-cyanobiphenyl}}$ (8CB) on Si is investigated via optical and x-ray reflectivity measurement. An experimental phase diagram is obtained showing a broad thick-thin coexistence region spanning…
The effect of Mn doping on the cubic to hexagonal phase transition temperature in BaTiO 3 has been determined by quenching samples with different Mn contents from a range of temperatures. Under conditions of equilibrating samples in air over the range 1000°–1400°C, cubic solid solutions BaTi 1− x Mn x O 3−δ form over…
High Resolution Image Download MS PowerPoint Slide Visible craze initiation stress has been measured for a wide range of linear and branched monodisperse polystyrenes (PS) soaked in diethylene glycol. Results show that, for a given time under stress, craze initiation in linear PS is disentanglement-dominated below a c…
The behavior of bubbles confined in tubes and channels is important in medical and industrial applications. In these small spaces, traditional means of experimentally observing bubble dynamics are often impossible or significantly perturb the system. A laser Doppler vibrometer (LDV) requires a narrow (<1 mm diameter)…
Abstract A series of imidazolium‐based ionic liquid monomers bearing a terminal pyrrole moiety were synthesized and electrochemically polymerized. It is found that the polymerizability of the synthesized ionic liquids is strongly dependent on the type of the counteranions. Although bromide monomer is not polymerizable…
Abstract In this paper we report the results obtained for inter‐matrix synthesis (IMS) and characterization of monometallic and bimetallic polymer‐stabilized metal nanoparticles (PSMNPs). The IMS procedure is based on the use of appropriately functionalized polymeric membranes as nanoreactors, which allows both synthe…
Abstract Copolymerization of ornithine‐ and lysine‐derived N ‐propargylamides, N ‐α‐ tert ‐butoxycarbonyl‐ N ‐δ‐fluorenylmethoxycarbonyl‐ L ‐ornithine N ′‐propargylamide ( 1 ), N ‐α‐ tert ‐butoxycarbonyl‐ N ‐ε‐fluorenylmethoxycarbonyl‐ L ‐lysine N ′‐propargylamide ( 2 ), N ‐α‐fluorenylmethoxycarbonyl‐ N ‐δ‐ tert ‐buto…
RGD (arginine-glycine-aspartic acid) is a known peptide sequence that binds platelet integrin GPIIbIIIa and disrupts platelet-fibrinogen binding and platelet cross-linking during thrombosis. RGD peptides are unsuitable for clinical applications due to their high 50% inhibitory concentration (IC50) and low in vivo resi…
We use multispeckle dynamic light scattering to study the dynamics of physical gelation of methylcellulose in water. Following a temperature ramp to above 55 °C, a polymer network is formed which can be destroyed upon cooling the gel. We monitor this process by detecting the total scattered light intensity which shows…
Lead‐free (K 0.44 Na 0.52 Li 0.04 )(Nb 0.80− x Ta 0.20 Sb x )O 3 piezoelectric ceramics were prepared by the ordinary sintering method. The much higher Pauling electronegativity of Sb compared with Nb makes the ceramics more covalent. By increasing x from 0.00 to 0.06, the phase structure of the ceramics changed from…
The dyad RuLRe contains (Re(bpy)(CO)3Cl) and (Ru(bpy)(bpyam)2)2+ termini (bpy = 2,2'-bipyridine; bpyam = 4,4'-diethylamido-2,2'-bipyridine) separated by a flexible ethylene spacer. Luminescence studies reveal the expected Re --> Ru photoinduced energy transfer, with partial quenching of Re(I)-based triplet metal-to-li…
We have examined bulk structure models for icosahedral AlPdMn in terms of the densities, compositions, and interplanar spacings for the fivefold planes that might represent physical surface terminations. We focus on four models that contain no partial or mixed occupancies, but some comparison is made to a fifth model…
TFTs based on solution-processed CdSe films as the semiconductor and a solution-processed nanoscopic self-assembled gate dielectric are fabricated. The devices exhibit high electron mobilities at low operating voltages.