Materials Literature
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Highly ordered mesoporous silver, which exhibits well-defined mesopores, high surface area and pore volume, has been successfully obtained using a cubic mesoporous silica, KIT-6, with controlled surface hydrophobicity as the hard template.
Abstract Application of cuprous oxide (Cu 2 O) thin films for methane gas sensors was investigated. The Cu 2 O films were prepared by the thermal oxidation of Cu films under reduced partial pressure of oxygen. The XRD and AFM measurements were performed to investigate crystal structure and the surface properties of sy…
The effective atomic numbers Z(eff) of some fatty acids and amino acids have been calculated by two numerical methods, a direct method and an interpolation method, in the energy range of 1 keV-20 MeV. The notion of Z(eff) is given a new meaning by using a modern database of photon interaction cross sections (WinXCom).…
The CO oxidation reaction on Rh(111) was studied both at low pressures (≤2 × 10 −4 Torr) under steady-state conditions and at high pressures (0.01−88 Torr) in a batch reactor at various gaseous reactant compositions. Surface CO and O coverages were determined using polarization modulation infrared reflection absorptio…
On a roll: Attachment of flexible coils to the middle of a rigid rod generates T-shaped rod-coil molecules that self-assemble into layers that roll up to form filled cylindrical and hollow tubular scrolls, depending on the coil length, in the solid state (see picture); the rods are arranged parallel to the layer plane.
The microstructure and deformation mechanics of carbon-nantotube networks are measured, and demonstrate a crossover from strain-induced deformation, dominated by aggregates of short rigid nanorods, to deformation dominated by individual long semi-flexible nanotubes. Our results suggest that short nanotubes provide the…
Direct visualization of photoinduced tunneling charge transfer (TCT) in an Au(5)/para-aminothiophenol (PATP)/Ag(6) junction in which Au and Ag clusters form the first and second layer, respectively, is provided by the charge difference density (see picture; green and red stand for holes and electrons, respectively). W…
We report the investigation of titania (Degussa P25) supported gold catalysts prepared by magnetron sputtering. Catalysts grown on natural fumed titania were structurally unstable, resulting in the rapid coarsening of 2.4 nm gold clusters into large ∼20 nm gold clusters in a few days at room temperature under normal a…
Abstract A series of rigid π‐conjugated mono‐, bis‐, tris‐, and tetrakis(terpyridine)s 3 – 8 was synthesized in high yields by means of Horner–Wadsworth–Emmons (HWE) reactions between benzyl phosphonates 1 and an aldehyde‐functionalized terpyridine derivative 2 . The photophysical properties of the materials in soluti…
Two Cys-containing analogues of the anticancer drug Kahalalide F are synthesized and conjugated to 20 and 40 nm gold nanoparticles (GNPs). The resulting complexes are characterized by different analytical techniques to confirm the attachment of peptide to the GNPs. The self-assembly capacity of a peptide dramatically…
Inelastic neutron scattering (INS), electron spin resonance (ESR), and nuclear magnetic resonance (NMR) measurements were employed to establish the origin of the strong magnetic signal in lightly-hole-doped La1-xSrxCoO3, x approximately 0.002. Both INS and ESR low temperature spectra show intense excitations with larg…
We describe the preparation and solution properties of Janus micelles, i.e., non-centrosymmetric nanoparticles with compartmentalized shells, viaco-assembly of two fully water-soluble block copolymers. They consist of a mixed core of poly(N-methyl-2-vinyl pyridinium iodide) (P2MVP) and poly(acrylic acid) (PAA), and a…
The efficiency of photovoltaic energy conversion processes is often limited by the fact that electronic properties, band-gap and reflectivity of the employed cell (or cell material) and the spectral distribution of sunlight do not sufficiently match. In this context, solar spectral converters and concentrators that re…
Binding kinetics of platinum-, silica-, and gold-binding peptides were investigated using a modified surface plasmon resonance spectroscopy (SPR). Platinum binding septa-peptides, quartz-binding dodecapeptides, and gold-binding 14-aa peptides were originally selected using phage or cell surface display libraries using…
Uniform Lu 2 O 3:Eu 3+ nanorods and nanowires have been successfully prepared through a simple solution-based hydrothermal process followed by a subsequent calcination process without using any surfactant, catalyst, or template. On the basis of X-ray diffraction, thermogravimetric analysis and differential scanning ca…
Abstract Novel Raman tags called nanoaggregate‐embedded beads (NAEBs) have been developed. NAEBs are silica‐coated, dye‐induced aggregates of a small number of metal nanoparticles. In this work, the Raman reporters used to induce aggregation of gold nanoparticles include strongly binding dyes such as XRITC, TRITC, and…
Liquid-vapor phase-change processes are becoming increasingly important in a wide variety of fields ranging from energy conversion, to microelectronics cooling, MEMs devices, and self-assembly. The phase change in these systems is governed by processes that occur at the contact line, where three phases meet. Evidence…
Density-functional calculations have been performed to investigate the adsorption of CO(2) on defected graphite (0001) represented by a single graphene sheet. The interaction with a vacancy defect gives a computed molecular binding energy of approximately 136 meV in a strong physisorbed state. Subsequently, chemisorpt…
Abstract Carbon‐nanotube (CNT) composites have attracted a lot of attention because of their potential applications in many fields. Here, recent advances in the synthesis of CNT composites using supercritical fluids (SCFs) are highlighted. SCFs exhibit unique features for the synthesis of composites because of their u…
The production of a new class of glycolipid–metal nanoparticle conjugates, namely, sophorolipid reduced/capped silver nanoparticles is demonstrated for the first time, by unveiling the reducing and capping abilities of sophorolipid derived from oleic acid. It is also demonstrated that the sophorolipid capped Ag nanopa…