Materials Literature
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Abstract High second‐order susceptibilities are created by thermal poling in bulk germanium disulfide based chalcogenide glasses. Experimental conditions of the poling treatment (temperature, voltage, time) were optimized for each glass composition. The second‐order nonlinear signals were recorded by using the Maker f…
Lichtbündel: Nanostrukturierte Anordnungen von NaMF4 (M=Seltenerdmetall) lassen sich mit einer Hydrothermalmethode herstellen. Sie bestehen aus Nanopartikeln mit gut einzustellenden Morphologien (Röhren, Scheiben oder Stäbe), Phasen (kubisch oder hexagonal) und Größen (80–900 nm). Ein NaYF4-System, das zusätzlich mit…
The extinction spectra of J-aggregated dyes on gold nanoparticles, which exhibit interferences between the plasmonic and dye resonances, are simulated by a quantum mechanical model that considers the dye transition to interact through transition-dipole coupling with a continuum of nanoparticle states. This alternative…
Shear can impart a high degree of orientational order to block copolymer thin films containing two or more layers of spherical domains, but the orientational order appears to plateau at a limited level with increasing shear stress. At high stresses, the only defects which remain in the film are isolated dislocations,…
$X$- and $Q$-band electron paramagnetic resonance measurements are reported on ${\mathrm{Mn}}^{4+}$-doped $\mathrm{Ba}\mathrm{Ti}{\mathrm{O}}_{3}$ single crystals in the rhombohedral low-temperature phase. The ${\mathrm{Mn}}^{4+}$ probe ion is statistically substitute for the isovalent ${\mathrm{Ti}}^{4+}$ ion. The cr…
Abstract Silica thin films with variable pore hierarchy (different combinations of small meso‐, large meso‐, and macropores) were produced via evaporation induced self‐assembly in a one‐pot synthesis. A suitable block copolymer and an ionic liquid served as porogens for the generation of different types of mesopores w…
Abstract Fourier transform infrared (FTIR) spectroscopy techniques were used in the study of the effect of microwave (MW) heating on the structural properties of cotton fibers and on the mercerization mechanism of these fibers. Samples of the fibers were microwave heated for different times and different microwave pow…
A facile way to prepare sheet- and tubelike free-standing films of poly(acrylic acid) (PAA)/poly(allylamine hydrochloride) (PAH) was developed by exfoliating PAA/PAH multilayer films from substrates in acid aqueous solution containing copper ions. The exfoliation of the PAA/PAH film from the substrate was achieved by…
Abstract In this study, the composites of thermoresponsive poly( N ‐isopropylacrylamide) (PNIPAm) and mesoporous silica particles were synthesized. 3‐(Trimethoxysilyl)propyl methacrylate (MOP) was used to introduce double bonds on silica particles. First, MOP‐modified spherical silica particles were prepared by the se…
Some shape memory alloys like NiTi show noticeable high damping property inpseudoelastic range. Due to its unique characteristics, a NiTi alloy is commonly used forpassive damping applications, in which the energy may be dissipated by the conversion frommechanical to thermal energy. This study presents a shape memory…
Five diamines with thiophene-based bridges--(E)-1,2-bis{5-[bis(4-butoxyphenyl)amino]-2-thienyl}ethylene (1), 5,5'-bis[bis(4-methoxyphenyl)amino]-2,2'-bithiophene (2), 2,6-bis[bis(4-butoxyphenyl)amino]dithieno[3,2-b:2',3'-d]thiophene (3), N-(4-tert-butylphenyl)-2,6-bis[bis(4-methoxyphenyl)amino]dithieno[3,2-b:2',3'-d]p…
The self-assembly reaction between trivalent lanthanide ions, 2,2':6',2' '-terpyridine (terpy) ligand, and octacyanotungstate(V) leads to the formation of two series of isomorphous cyano-bridged compounds: (i) one-dimensional (1-D) chains [Ln(terpy)(DMF)(4)][W(CN)(8)].6H(2)O.C(2)H(5)OH (Ln = Ce-Dy) and (ii) dinuclear…
Two new linear pentanickel complexes [Ni5(bna)4(Cl)2][PF6]2 (1) and [Ni5(bna)4(Cl)2][PF6]4 (2; bna=binaphthyridylamide), were synthesized and structurally characterized. A derivative of 1, [Ni5(bna)4(NCS)2][NCS]2 (3), was also isolated for the purpose of the conductance experiments carried out in comparison with [Ni5(…
The quadrupolar ruthenium alkynyl cruciform complex is reversibly converted to tetravinylidene complex or tetraruthenium(III) tetracationic complex forms by protonation or oxidation, respectively; linear and nonlinear proto- and electrochromism studies reveal independent switching of NLO properties by the protic and e…
Three new copper iodobismuthates, red tetranuclear [n-Bu(4)N][Cu(2)(CH(3)CN)(2)Bi(2)I(10)] (1), dark-red infinite linear [Et(4)N](2n)[Cu(2)Bi(2)I(10)](n) (2), and black polymeric ladderlike [Cu(CH(3)CN)(4)](2n)[Cu(2)Bi(2)I(10)](n) (3), crystallize from solutions of BiI3 and CuI in the presence of different cations. A…
Conductive polymer chains were directly grafted on a variety of organic substrates containing aromatic functionalities. In this one-step mechanism, the covalent linkages between the substrates and the conducting polymers are created. The enhanced adhesion by grafting enables high-resolution patterning (down to 60 nm)…
PURPOSE: To prospectively determine the cellular iron uptake by using R2 and R2* mapping with multiecho readout gradient-echo and spin-echo sequences. MATERIALS AND METHODS: All experiments were approved by the institutional animal care committee. Lung carcinoma cells were lipofected with superparamagnetic iron oxides…
Three separate organic, fluorescent emitter molecules with emission spectra corresponding to either blue, orange, or yellow have been covalently attached to an inorganic polyhedral oligomeric silsesquioxane (POSS) core in several controllable combinations. We were able to functionalize POSS with eight of the same emit…
A novel electroactive silsesquioxane precursor, N-(4-aminophenyl)-N'-(4'-(3-triethoxysilyl-propyl-ureido) phenyl-1,4-quinonenediimine) (ATQD), was successfully synthesized from the emeraldine form of amino-capped aniline trimers via a one-step coupling reaction and subsequent purification by column chromatography. The…
Magnetic and fluorescent multifunctional chitosan nanoparticles as a smart drug delivery system, Li, Linlin, Chen, Dong, Zhang, Yanqi, Deng, Zhengtao, Ren, Xiangling, Meng, Xianwei, Tang, Fangqiong, Ren, Jun, Zhang, Lin