Materials Literature
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The synthesis, characterization, and catalytic properties of 1-3 nm-diameter bimetallic PdAu dendrimer-encapsulated catalysts are reported. Both alloy and core/shell PdAu nanoparticles were prepared. The catalytic hydrogenation of allyl alcohol was significantly enhanced in the presence of the alloy and core/shell PdA…
A free-standing nanoporous gold (NPG) membrane is made by dealloying commercially available white-gold leaf in nitric acid (see Figure). This porous material has an unusual combination of characteristics in that it is metallic with a continuous crystal lattice throughout the porous network, and has a pore size that is…
Abstract In recent decades, significant advances in drug‐delivery systems have enabled more effective drug administration. To deliver drugs to specific organs, a range of organic systems (e.g., micelles, liposomes, and polymeric nanoparticles) have been designed. They suffer from limitations, including poor thermal an…
A detailed study on the mechanism of band-to-band tunneling in carbon nanotube field-effect transistors (CNFETs) is presented. Through a dual-gated CNFET structure tunneling currents from the valence into the conduction band and vice versa can be enabled or disabled by changing the gate potential. Different from a con…
Biaxial compressive strain has been used to markedly enhance the ferroelectric properties of BaTiO3 thin films. This strain, imposed by coherent epitaxy, can result in a ferroelectric transition temperature nearly 500 degrees C higher and a remanent polarization at least 250% higher than bulk BaTiO3 single crystals. T…
Axial ligand exchange reactions of [Pt 3 (μ-dpmp) 2 (XylNC) 2 ](PF 6 ) 2 ( 1 ) with monoisocyanide molecules afforded a series of linear triplatinum complexes, [Pt 3 (μ-dpmp) 2 (RNC) 2 ](PF 6 ) 2 (R = 2,4,6-mesityl ( 2 ), tert -butyl ( 4 ), 4-tolyl ( 5 )) and [Pt 3 (μ-dpmp) 2 (XylNC)( t- BuNC)](PF 6 ) 2 ( 3 ), which w…
Herein, we describe a study aimed at synthesizing mixed-monolayer-protected CdS nanoparticles and investigating the reactivity of surface-bound functional groups in order to facilitate the immobilization of nanoparticles on a solid substrate as well as the construction of a three-dimensional nanocomposite. CdS nanopar…
We analyze differences in dynamics and in properties of the sampled potential energy landscape between different equilibrium trajectories, for a system of rigid water molecules interacting with a two-body potential. On entering in the supercooled region, differences between different realizations increase and survive…
High-resolution angle-resolved photoemission spectroscopy (ARPES) has been performed on layered cerium trichalcogenide $\mathrm{Ce}{\mathrm{Te}}_{3}$ to study the incommensurate charge-density-wave (CDW) mechanism. We found that ARPES spectra near the Fermi level along the superlattice direction ($\ensuremath{\Gamma}\…
Visible, near-infrared, IR and Raman spectra of magnesian gaspeite are presented along with explanations of spectral features. Of the cations, nickel ion is main source for the electronic features as a principal constituent in the mineral where as the bands in IR and Raman spectra are due to the vibrational processes…
The architecture of mesoporous silica was successfully controlled by adjusting the concentrations of a cationic surfactant and ammonia. An excess amount of the surfactant suppressed the grain growth and then induced the formation of small grains with a diameter below 20 nm. Consequently, assembly of the small-sized gr…
The positions of the ordered hydrogen isotopes of a protein and its bound solvent can be determined by using neutron crystallography. Furthermore, by collecting neutron data at cryo temperatures, the dynamic disorder within a protein crystal is reduced, which may lead to improved definition of the nuclear density. It…
Abstract The accelerated single electron transfer–degenerative chain transfer mediated living radical polymerization (SET–DTLRP) of vinyl chloride (VC) in H 2 O/tetrahydrofuran (THF) at 25 °C is reported. This process is catalyzed by sodium dithionite (Na 2 S 2 O 4 )‐sodium bicarbonate (NaHCO 3 ). Electron transfer co…
Abstract Randomly copolymerized poly(carbonate) glycols were employed as starting materials for the synthesis of polyurethane elastomers (PUEs). The poly(carbonate) glycols had hexamethylene (C 6 ) and tetramethylene (C 4 ) units between carbonate groups in various composition ratios (C 4 /C 6 = 0/100, 50/50, 70/30, a…
Ultrathin films of CuS and CuO have been obtained at the liquid-liquid interface by the reaction of copper cupferronate solution in toluene with Na(2)S or NaOH in aqueous solution. The films are generally single crystalline and around 40 nm thick. The thickness and crystallinity of the films are determined by the reac…
The lattice dynamical properties of ${\mathrm{Ba}}_{x}{\mathrm{Sr}}_{1\ensuremath{-}x}{\mathrm{TiO}}_{3}$ single crystals with $x=0.05$, 0.1, 0.2, 0.35, and 0.5 have been studied by Raman spectroscopy in the temperature range $5--300\phantom{\rule{0.3em}{0ex}}\mathrm{K}.$ We present the data on the composition and tem…
Abstract The orientation behavior of isotactic polypropylene (iPP) in α‐ and β‐crystal form was investigated by rheo‐optical Fourier transformed infrared (FTIR) spectroscopy. This method enabled quantification of the degree of orientation as a feature of structural changes during uniaxial elongation in not only the cr…
Core-level photoelectron spectra, in excellent agreement with ab initio calculations, confirm that the stable wetting layer of water on Ru{0001} contains O-H and ${\mathrm{H}}_{2}\mathrm{O}$ in roughly $3\ensuremath{\mathbin:}5$ proportion, for ${\mathrm{O}\mathrm{H}}_{x}$ coverages between 0.25 and 0.7 ML, and $T<…
Abstract The reactivities and reaction rates of the thiol–ene coupling reaction of 2‐ethyl‐(hydroxymethyl)‐1,3‐propanediol trimercapto acetate and 2‐ethyl‐(hydroxymethyl)‐1,3‐propanediol trimercapto propionate with two common unsaturated fatty acid methyl esters (methyl oleate and methyl linoleate) were evaluated. The…
For magnetic-dipolar modes in a ferrite, components of the magnetic flux density in a helical coordinate system are dependent on both an orientation of a gyration vector and a sign of a pitch. It gives four types of helical harmonics for magnetostatic-potential wave functions in a ferrite disk. Because of the reflecti…