Materials Literature
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This paper considers the theory of electron field emission from nanoscale emitters with particular focus on thermal and electrical energy transport. The foundational theory of field emission is explored, and a model is presented that accounts explicitly for the energy band curvature produced by nanoscale tip emitters.…
An unconventional self-assembly process was integrated with traditional silicon microfabrication technologies to directly form hexagonally ordered nanoporous patterns on both SiO 2 and Si surfaces. Starting with an aluminium thin film deposited on a SiO 2 or Si substrate, an Al anodization process was employed to gene…
Abstract Comonomer effect on the mechanical and morphological behavior of the calcite (stearic acid coated calcium carbonate)‐filled polypropylene (PP), poly(propylene‐random‐ethylene) copolymer (CoPP), and poly(propylene‐ co ‐ethylene‐ co ‐1‐butene) terpolymer (TerPP) composites were investigated by using dumbbell ba…
The crystal structure of a new polymorph of nabumetone has been determined that displays dramatically lower stability yet differs only in weak intermolecular interactions from the known form.
The electronic eigenvalues and eigenstates of finite parts of Penrose structures are studied on the basis of a recently proposed three-dimensional solvable model [J. Phys. A 30, 7831 (1997)]. This model allows to take explicitely into account the geometry in three-dimensional space and involves no assumptions such as…
The structure and structural transition of the glycine residue adjacent to the N-terminal alanine residue of the poly(L-alanine), (Ala)(12-13), region in Samia cynthia ricini silk fibroin was studied using (13)C nuclear magnetic resonance (NMR). Most of the glycine carbonyl peaks in the (13)C solution NMR spectrum of…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTGold Nanoparticle Patterns on Polymer Films in the Presence of Poly(amidoamine) Dendrimers†Jongok Won, Kyo Jin Ihn, and Yong Soo KangView Author Information Department of Applied Chemistry, Sejong University, 98 Gunja, Gwangjin, Seoul, 143-747, Korea, Department of Chemical Eng…
A new strategy involving the introduction of a cationic surfactant, cetyltrimethylammonium bromide (CTAB), for the modification of electrodes with cobalt hexacyanoferrate (CoHCF) film has been found to be beneficial. The surfactant has been found to influence the electrochemical properties of the CoHCF-modified electr…
The incorporation of nanoparticles into a novel organogel occurs spontaneously when nanoparticle-containing AOT reverse micelles come into contact with a solution of p -chlorophenol in isooctane. The organogel consists of strands of stacked phenols that self-assemble to fibers and further to fiber bundles. Atomic forc…
Compounds from the solid solution ${\mathrm{Eu}}_{y}{\mathrm{Fe}}_{4\ensuremath{-}x}{\mathrm{Co}}_{x}{\mathrm{Sb}}_{12}$ were synthesized and found to crystallize in the partially filled skutterudite-type structure ${\mathrm{LaFe}}_{4}{\mathrm{P}}_{12}.$ The maximal Eu content gradually decreases from practically full…
Langmuir monolayers are good model systems for investigating the use of organic templates to control the growth and morphology of calcium carbonate. We investigate the structure of the organic–mineral interface using molecular dynamics methods. The monolayer consists of octadecanoic (stearic) acid molecules; the calci…
The surface-enhanced Raman scattering (SERS) spectra of guanine and its alkylated derivatives 7-methylguanine (7-MeG) and 9-ethylguanine (9-EtG) adsorbed to a silver colloid and a silver electrode are reported. The influence of the pH and the surface potential are studied. The interaction between the three molecules a…
Using a new charge-compensation strategy, we designed neutral molecules with perfectly planar C(C)(4)-type tetracoordinate carbon arrangements (ptC) employing DFT computations. These designs, based on the planar preference of methane dications, replace two remote carbons in spiroalkaplanes by borons or two remote hydr…
Iron oxide nanoparticles were synthesized inside 5 μm polyelectrolyte capsules. The capsule wall, made of polyelectrolyte multilayers of poly(styrenesulfonate) (PSS) and poly(allylamine hydrochloride) (PAH), is permeable for small ions but not for polymers. To perform particle synthesis exclusively in the capsule inte…
Sodium dodecyl sulphate (SDS), a detergent that mimics some characteristics of biological membranes, has been found to affect significantly fibril formation by a peptide from human complement receptor 1. In aqueous solution the peptide is unfolded but slowly aggregates to form fibrils. In sub-micellar concentrations o…
Abstract Crosslinking of homemade low‐density polyethylene (LDPE) was performed by electron‐beam (EB) irradiation. The gel content of the EB‐exposed LDPE was determined by the solvent‐extraction method. The degree of crosslinking was also evaluated by a hot set measuring test. The results obtained from both the gel–so…
Under well-controlled conditions, different polypyrrole variants can be galvanostatically prepared in acetonitrile + 1% H 2 O by changing the current density. At current densities down to 0.25 mA/cm 2, PPy(I) is electrosynthesized; at lower current densities, a mixture of PPy(I) and PPy(II) is generated. In the presen…
A low-temperature solution-based synthetic method was developed for the large-scale synthesis of one-dimensional nanostructures of alkali titanates. Two kinds of highly pure ribbonlike titanates were synthesized successfully in gram quantities without introducing any templates or catalysts. The structure and compositi…
A non-layer-shrinkage fluorinated ferroelectric liquid crystal compound, 8422[2F3], has been characterized by means of optical, x-ray, and calorimetric methods. The orientational distribution within macroscopic volumes, determined through wide-angle x-ray scattering and birefringence measurements, was found to be iden…
The synthesis and photophysical characterization of a generation 1 dendrimer containing four coumarin 2 laser dyes at the periphery and a perylenebis(dicarboximide) derivative at the core are described. It was found that 99% of the UV light absorbed by the peripheral coumarin 2 donor chromophores is transferred throug…