Materials Literature
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Abstract Here we show the possibility to obtain azopolysiloxanes modified with nucleobases (adenine and thymine) with potential application in immobilization and nanomanipulation of biomolecules. We propose a photofluidization mechanism based on the concept of the conformational instability, which can explain the pres…
Dodecylamine-intercalated vanadium oxide nanotubes were obtained by distinct synthesis processes. Water intercalation in the nanotube structure was identified in a marked manner by the distortion of the $\mathrm{V}{\mathrm{O}}_{x}$ layers in the x-ray diffraction patterns and enhanced ${\mathrm{V}}^{4+}\mathrm{O}$ ab…
Biphenyl-bridged mesoporous organosilica with molecularly ordered pore walls was successfully synthesized under acid conditions in the presence of triblock copolymer P123 as structure-directing agent and butanol as additive. This material exhibited high surface area and larger pores and pore volume than the correspond…
We have investigated the self-assembling process of cellulose artificially synthesized via enzymatic polymerization as one of general problems of chemical reactions at specific sites and reaction-induced self-assembling process of reaction products in the context of nonequilibrium phenomenon and pattern formation. The…
A novel stabilized hemocompatible multicomponent coating was engineered by consecutive alternating adsorption of two polysaccharides, alginate (Alg) and heparin (Hep), onto a Nitinol surface via electrostatic interaction in combination with photoreaction in situ. For this purpose, a photosensitive cross-linker, p-diaz…
A wide variety of π-conjugated polymers have been synthesized by using organometallic polycondensations. For instance, Ni(0) complex-promoted dehalogenative polycondensation of dihaloaromatic compounds, X–Ar–X, affords poly(arylene)s, –(Ar)n–. Pd-catalyzed polycondensation gives alternating copolymers, –(Ar–Ar′)n–, an…
The effect of chain structure (supramolecular random copolymer vs supramolecular segmented copolymer) on material properties of supramolecular polymers was studied, using polyesters, end-functionalized with quadruple hydrogen-bonding ureidopyrimidinone (UPy) units. Mixing of miscible UPy homopolymers led to supramolec…
The effects of temperature and fluorine concentration on the field emission properties of diamond-like carbon (DLC) films were studied in detail. The atomic percentage of fluorine in the films was varied from 0 to 15.3 at.% as measured from energy-dispersive analysis of x-rays. The chemical bindings were investigated…
The Cs adsorption on InP(100) surface is studied with synchrotron radiation photoelectron spectroscopy. The charge transfer from Cs to the InP substrate is observed from the Cs induced In 4d and P 2p components, and this charge transfer results in surface dipole formation and lowering of the work function. The Cs 4d i…
Low-temperature Raman studies on (100)-oriented LaMnO 3 thin films of different thicknesses deposited on LaAlO 3 (100) substrate by using the pulsed laser deposition technique are presented. The phonon mode frequencies depend strongly on the thickness of the film and in comparison to the LaMnO 3 single crystal shift t…
Abstract Surface modification by plasma treatment is widely used for textiles and polymeric materials. Plasma processes are environmentally friendly and reduce chemicals and energy consumption. This study reports the effect of cold, low‐pressure oxygen plasma on the wettability properties of polypropylene (PP) nonwove…
Mobile poly(ethylene oxide) diglycidyl ether (PEODGE) segments were chemically grafted onto a soluble wheat protein (WP), and different network structures were formed via coupling reactions with ethyl diamine (EDA) in different PEODGE/EDA (PE) ratios. When the PE ratio was 1:1, linear PEs were the predominant segments…
Colloidal suspensions can be regarded as an ideal model system for such key daily materials as emulsions, protein solutions, foods, and inks. When colloidal particles strongly attract each other, they aggregate, phase-separate, and sometimes form gels. The basic understanding of this spatially heterogeneous jamming pr…
Conductive and mesoporous single-wall carbon nanohorn/resorcinol-formaldehyde aerogel composites were fabricated by embedding organic resorcinol-formaldehyde aerogels with single-wall carbon nanohorns. Samples were characterized with transmission electron microscopy, field emission scanning electron microscopy, nitrog…
Mechanical interactions between amorphous polymers and nanofillers were probed by measuring the tensile moduli of nanocomposite fibers with aligned single wall carbon nanotubes (SWNT) and carbon nanofibers (CNF). Polymer chains provide better load transfer and thereby higher tensile moduli when the polymer size is lar…
Abstract The mechanical properties and thermal stability of polymers can be enhanced through the formation of nanocomposites. Nanocomposites consisting of hybrid copolymers of methacrylcyclohexyl polyhedral oligomeric silsesquioxane (POSS‐1) and methyl methacrylate (MMA) with up to 92 wt % (51 mol %) POSS‐1 and with s…
Neutron elastic, inelastic, and high-energy x-ray scattering techniques are used to explore the nature of the polaron order and dynamics in the colossal magnetoresistive (CMR) system ${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}\mathrm{Mn}{\mathrm{O}}_{3}$. Polaron correlations are known to develop within a narrow temperatu…
Abstract Ultra‐thin, optically transparent and electrically conducting films of pure carbon nanotubes (CNTs) are widely studied thanks to their promise for broad applications. In the present work, we study and compare different deposition techniques for the production of these networks: dip‐coating, spray‐coating, vac…
Self-assembly vesicles have been made from a cyclodextrin (CD) supramolecular complex, which is cooperatively formed with natural beta-CD, 1-naphthylammonium chloride (NA), and sodium bis(2-ethyl-1-hexyl)sulfosuccinate (AOT) by weak noncovalent interactions. In the complex structure, a NA molecule is included inside a…
Lanthanide complexes of tetraamide derivatives of DOTA are of interest today because of their application as chemical exchange saturation transfer (CEST) agents for magnetic resonance imaging (MRI). The protonation constants of some simple tetraamide derivatives of DOTA and the stability constants of the complexes for…