Materials Literature
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An ideal electrical wire needs not only good conductivity for its central conductor but also a surrounding insulating layer to protect its current from leaking. We show that the extended metal-atom chain is a promising candidate to be the smallest molecular electrical wire for future practical applications. The electr…
Trimethylamine N-oxide and trimethylphosphine oxide guests are pairwise encapsulated in a dimeric capsule self-assembled from a tetraurea aryl extended calix[4]pyrrole. The capsule possesses polar functional groups in its interior capable of controlling the orientation of the included guests. A modest selectivity is o…
Four kinds of Si-atom pillared lamellar silicates (APZ-1−APZ-4) were prepared by thermal acid treatment in an autoclave at 443 K for 1−24 h using aqueous HCl. Layered silicates PLS-1, PLS-3, PLS-4, and PREFER, which consist of ferrierite layer sheets, could be converted into new open-framework microporous materials by…
Abstract A time‐dependent electrochemical and mechanical model of the bending of a conducting polymer actuator‐driven structure is presented, and the predicted response is compared with experimental results. The model uses time constants obtained from a transmission line model to describe the electronic and ionic char…
Leakage radiation microscopy (LRM) is used to directly image surface-plasmon-coupled emission (SPCE). When compared with the prism-based setup commonly used in SPCE research, LRM has the advantages of directly giving out the emitting direction without angle scanning, and the image generated of surface plasmon polarito…
The development of a kinase structural database, the kinase knowledge base (KKB), is described. It covers all human kinase domain structures that have been deposited in the Protein Data Bank. All structures are renumbered using a common scheme, which enables efficient cross-comparisons and multiple queries of interest…
Stimuli-responsive surfaces grafted with thermoresponsive polymers switch from hydrophilic to hydrophobic thermally, making these surfaces attractive in applications such as in microfluidics devices, as antifouling surfaces, and in cell culture and tissue engineering. These materials exhibit changes in wettability as…
Polyrotaxanes (PRs), in which α-cyclodextrins (α-CDs) were threaded onto poly(ethylene glycol) (PEG) chains capped with β-cyclodextrins (β-CDs), were prepared by click chemistry via a one-pot strategy in water at room temperature with high yield, up to 320 mg/100 mg PEG axis. The terminal β-CD cavity could be recogniz…
Nanosized boron(III) oxide-doped titania was prepared by homogeneous hydrolysis of titanium oxo-sulfate with urea in aqueous solutions in the presence of amorphous boron. The prepared samples were annealing at 700 degrees C. The structure of as-prepared samples was characterized by X-ray powder diffraction (XRD) and s…
Highly crystalline Pr6O11 nanorods were prepared by a simple precipitation method of triethylamine complex at 500°C. Synthesized Pr6O11 nanorods were uniformly grown with the diameter of 12-15 nm and the length of 100-150 nm without any impurities of unstable PrO2 phase. The Pr6O11 nanorod electrodes attained a high e…
It is an ever-growing challenge to develop nanodevices for controlling energy transport. An open question is whether we can create and control heat current at strict zero thermal bias, and if yes, how to do it. In this paper, we demonstrate that a nonlinear asymmetric system, when pushed out of equilibrium, can produc…
Two-dimensional nanoarrays of Ge quantum dots (QDs) with the ability to self-repair were epitaxially grown by self-organization on Si substrates using an ultrathin SiO(2) film technique. Nanometer-sized voids were patterned on ultrathin SiO(2) films by transcription of the pattern of block copolymer films using a sele…
Graphite inclusions in diamond, K-bearing clinopyroxene, garnet and kyanite and graphite coatings around microdiamonds from the ultrahigh-pressure Kokchetav Massif, northern Kazakhstan were investigated by means of scanning electron microscopy, laser Raman spectroscopy and X-ray diffraction. Important observations inc…
We report the synthesis of a new hydrocarbon copolymer which is soluble in supercritical carbon dioxide. Poly(vinyl acetate- alt -dibutyl maleate) (PVAc- alt -PDBM) copolymer was synthesized by free-radical polymerization mediated by the RAFT technique. Liquid CO 2 extraction was performed to remove the residual monom…
With the perspective of producing power-generating displays of various colors based on π-conjugated semiconducting polymers, we have developed a synthetic design aimed at addressing color states commonly difficult to attain. Herein, we report on the structure−property relationships and performance in photovoltaic devi…
Fluorescence spectroscopy is a powerful, extremely sensitive technique for the investigation of enzyme and ribozyme mechanisms. Herein, we describe the synthesis and characterization of water-soluble fluorescence probes for studying biocatalytic Diels-Alder reactions. These probes consist of anthracene and sulfonated…
Two iodoargentate hybrid solids {[Ni(2,2′-bipy)(THF) 2 (H 2 O) 2 ](Ag 10 I 12 )·2DMF} n ( 1 ) and {[Cu(2,2′-bipy) 3 ](Ag 5I7 )} n ( 2 ) (THF=tetrahydrofuran, DMF=N,N′-dimethyl formamide, 2,2′-bipy =2,2′-bipyridine) have been synthesized in a polar organic solvent, whose one-dimensional iodoargentate polymers are induc…
Three, no less and no more, is the number of naphthyridine oligoamide strands that intertwine to form a unique and robust triple helix architecture. The formation of either a parallel or antiparallel arrangement of the helical strands is governed by factors such as the polarity of the solvent (see picture).
N,N-Dimethylhydrazinium dicyanamide and nitrocyanamide ionic liquids (ILs) were prepared by quaterization of N,N-dimethylhydrazine with alkyl halides followed by metathesis reactions with silver dicyanamide or silver nitrocyanamide. The key physicochemical properties, such as melting point and decomposition temperatur…
In this study, simulation challenges intuitive models of "flexible" and "rigid" generation two triazine dendrimers as it pertains to solution conformation and conformation on binding DNA or siRNA sequences. These results derive from structural and energetic analyses of the binding events. Simulations of the rigid stru…