Materials Literature
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A tactic-al approach: By use of gold chemistry the first organic–inorganic polymer with a heterotactic architecture has been synthesized, and has enabled the first direct structural comparison of coordination polymers with isotactic, syndiotactic, and heterotactic architectures (see picture: naphthyl groups green, 4,4…
$\mathrm{Re}\mathrm{Ti}{\mathrm{O}}_{3+\ensuremath{\delta}∕2}$ ($\mathrm{Re}=\mathrm{La}$ and Nd) thin films have been deposited on $(100)\mathrm{La}\mathrm{Al}{\mathrm{O}}_{3}$ substrates using the pulsed laser deposition technique. The oxygen content in the formula can be tuned to some extent by carefully adjusting…
In continuation with our work on liquid crystals with unconventional molecular structures, two homologous series that have 1,4-disubstitution and 1,3,4-trisubstitution in the central phenyl ring, such as 2[(4-n-alkoxy-benzyloxy) phenyl azomethine]-5-methyl thiazole and 2-[(4-n-alkoxy-benzyloxy)-2-hydroxy salicyladimin…
The surface relaxations of the rutile $\mathrm{Ti}{\mathrm{O}}_{2}(110)(1\ifmmode\times\else\texttimes\fi{}1)$ clean surface have been determined by $\mathrm{O}\phantom{\rule{0.2em}{0ex}}1\phantom{\rule{0.3em}{0ex}}\mathrm{s}$ and $\mathrm{Ti}\phantom{\rule{0.2em}{0ex}}2{p}_{3∕2}$ scanned-energy mode photoelectron dif…
Novel palladium(II) complexes with bis(pyrazol-1-yl)methane ligands at the focal point of G0-G3 poly(aryl ether) Fréchet-type dendrons are reported. The molecular structures of the metallodendrimer series G0, G1, and G2 [(dend)CH(3,5-Me2pz)2(PdCl2)] have been determined by X-ray diffraction methods. The three structur…
A novel dimeric MnII complex {[Mn(N3O2)]Cl(OH2)}(2)2Cl (2) of a macrocyclic Schiff base ligand derived from the condensation of 2,2',6,6'-tetraacetyl-4,4'-bipyridine with 3,6-dioxaoctane-1,8-diamine in the presence of a stoichiometric amount of MnII has been prepared and characterized. The X-ray analysis of 2 reveals…
X-ray standing wave fields, excited in periodic nanostructured multilayers during Bragg diffraction, have been used to probe atomic migration in multilayers. Ion beam induced migration of Fe impurity atoms from the C layers to the Pt layers in a Pt(Fe)/C(Fe) multilayer, where each layer is about 2 nm thick, has been d…
In April 1991 the Commission on Aperiodic Crystals [1] adopted the following definition of a crystal:“[In the following] by ‘crystal’ we mean any solid having an essentially discrete diffraction diagram , [and by ‘aperiodic crystal’ we mean any crystal in which three-dimensional lattice periodicity can be considered t…
Poly(DL-lactic-co-glycolic acid) microspheres are prepared using a double-emulsion technique and are loaded with the model enzyme horseradish peroxidase (HRP). These microspheres can be used alone or as coatings for bioresorbable fibers that may be used as scaffolds for tissue regeneration applications. The present st…
Simple methods for producing continuous inorganic coatings on fibers have application in multiple technologies. The application of bioinspired strategies for the formation of particulate inorganic materials has been widely investigated and provides routes to inorganic materials under environmentally benign conditions.…
Lattice Monte Carlo simulations were performed to study the structure of hybrid organic-inorganic materials. Several cases were modeled where the composition corresponds to high surfactant concentration phases similar to that obtained from the synthesis of hybrid materials resulting from a phase separation. When using…
We investigate the self-assembly of anisotropic cone-shaped particles decorated by ringlike attractive "patches". In a recent paper, we demonstrated that the self-assembled clusters, which arise due to the conical particle's anisotropic shape combined with directional attractive interactions, are precise for certain c…
Two different types of peptide with high specificity for sPS. Phage libraries of random heptamer peptides were applied to syndiotactic polystyrene (sPS) film surfaces. Enzyme-linked immunosorbent assays with phage clones and a library quantitatively revealed greater apparent binding constants of clones to the target p…
[(n-C4H9)4N]2[Mo6O18(N-1-C10H(6)-2-CH3)] (1) has been prepared by the reaction of 1-amino-2-methylnaphthalene hydrochloride with [(n-C4H9)4N]4[alpha-Mo8O26] in the presence of 1,3-dicyclohexylcarbodiimide. Three solvent-free crystalline phases are isolated from the mixed solvents of acetone and acetic ether. The X-ray…
Photochromic process: Organoboron-functionalized 1,2-dithienylcyclopentene shows photochromism. Its absorption spectra can be modulated by fluoride and mercuric ions. The maximum of the photostationary state shifts from 560 to 490 nm upon the addition of fluoride anions and to 450 nm upon the addition of mercuric cati…
Abstract A new model to evaluate the elastic modulus of polymer nanocomposites is developed with emphasising on the role of inclusion/matrix interphase. The new model can be applied to polymer nanocomposites reinforced by inclusions with different shapes including spherical, cylindrical, and platelet. After validating…
Streptococcus mutans and certain other oral lactic-acid bacteria were found to have the ability to carry out malolactic fermentation involving decarboxylation of L-malate to yield L-lactic acid and concomitant reduction in acidity. The activity was inducible by L-malate in S. mutans UA159 growing in suspensions or bio…
The AAA ATPase, p97, achieves its versatility through binding to a wide range of cofactor proteins that adapt it to different cellular functions. The heterodimer UN (comprising Ufd1 and Npl4) is an adaptor complex that recruits p97 for numerous tasks, many of which involve the ubiquitin pathway. Insights into the stru…
Abstract Crystalline helical carbon nanotubes (HCNTs) are synthesized as the main products in the pyrolysis of acetylene at 450 °C over Fe nanoparticles generated by means of a combined sol–gel/reduction method. Transmission electron microscopy (TEM) images reveal that there are two HCNTs attached to each Fe 3 C nanop…
Intracellular trafficking of ammonium-functionalized single-walled carbon nanotubes reveals that after cell internalization the nanotubes translocate around the cell nucleus of human lung carcinoma cells (A549). The luminescent signal of the carbon nanotubes (no fluorescent labels) is used for 3D intracellular trackin…