Materials Literature
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Cu – Si O 2 – Si N x interconnects that were located 0.65–2.7-μm below the surface of silicon-integrated circuits were imaged in a scanning electron microscope and a transmission electron microscope with a scanning attachment by detecting backscattered electrons (BSEs) with an incident electron-beam energy (Eo) in the…
Abstract A series of manganese oxide‐loaded SBA‐15 (MnSBA‐ x h, x = 1, 2, 3, 4, 5, 6; h: hour(s)) mesoporous materials are synthesized via a facile, in‐situ reduction method with a surfactant template. The composite materials are characterized using Fourier‐transform infrared spectroscopy, X‐ray diffraction, N 2 sorpt…
Abstract Summary: Copolymers of ω ‐perfluorooctyalkyl acrylate C 8 F 17 ‐(CH 2 ) n′ OC(O)CHCH 2 with butyl acrylate were prepared by free radical polymerization. These compounds were characterized by 1 H and 19 F NMR spectroscopy. Thermal properties were evaluated by DSC and TGA analysis. By changing the fluorinated…
A new method for analyzing second-order phase transitions is presented and applied to the polaronic system La(0.7)Ca(0.3)MnO3. It utilizes heat capacity and thermal expansion data simultaneously to correctly predict the critical temperature's pressure dependence. Analysis of the critical phenomena reveals second-order…
Protein binders: Three representative polyoxometalate (POM) compounds, for example 1, which is of the Wells–Dawson class, were found to interact with the basic fibroblast growth factor (bFGF, right). The binding induces dramatic conformational changes in the growth factor. POMs are promising leads for compounds that m…
Hexagonal arrangement of iron oxide nanoparticles was fabricated by utilizing a single-layered film of diblock copolymer micelles. The synthesis was directly performed on the solid substrate by oxygen plasma with preserving the dimensional order of micelles so that separate procedures for synthesis and deposition of n…
We have previously demonstrated that the formation of and coalescence from polymer−cyclodextrin (CD) inclusion compounds (ICs) represents a very useful approach to modify the chain conformations and improve the crystallinity of various bulk polymers. The present work deals, for the first time, with the formation of a…
Within the framework: The fused benzodipyrrole unit within the sapphyrin 1 has a significant influence on its structure as compared to those of usual sapphyrins. The fused benzene ring partly inhibits distortion of the macrocycle about the dipyrrole unit (see structure of 1⋅2 H+ 2 (p-CH3C6H4SO3−); C gray, N blue, O re…
Abstract Perovskite titanates with nominal stoichiometry ABO 3+δ often exhibit quite interesting properties, but their structural characterization is not always rigorous. Herein, we demonstrate how excess oxygen can be incorporated in a titanate perovskite‐based lattice. A new family of layered perovskites La 4 Sr n –…
The mechanism of the formation of Si-C bonded monolayers on silicon by reaction of 1-alkenes with hydrogen-terminated porous silicon surfaces has been studied by both experimental and computational means. We propose that monolayer formation occurs via the same radical chain process as at single-crystal surfaces: a sil…
Abstract p‐Type conduction in amorphous oxide was firstly found in zinc rhodium oxide (ZnO·Rh 2 O 3 ) ( Adv. Mater. 2003 , 15 , 1409), and it is still the only p‐type amorphous oxide to date. It was reported that an ordered structure at the nanometer scale was contained and its electronic structure is not clear yet. I…
Abstract Summary: A convenient three‐step strategy has been developed for the preparation of well‐defined amphiphilic, linear‐hyperbranched block copolymers by hypergrafting. The synthetic procedure is based on a combination of carbanionic polymerization with the alkoxide‐based, controlled ring‐opening multibranching…
Abstract Summary: Polyethylene‐alumina nanocomposites were prepared using in situ polymerization. Alumina nanomers were prepared by treating alumina nanoparticles with an alkylaluminium compound and a vinyl alcohol. This approach led to (a) grafting double bonds onto the alumina surface, and (b) dispersion of alumina…
The theory of semiclassical carrier transport in semiconducting single-walled carbon nanotubes is presented. The focus is on transport in response to a small, axially applied field. Carriers are considered to scatter with longitudinal, torsional, and radial breathing acoustic phonons. Theory predicts large mobilities…
Abstract 1,4‐Bis[2‐(3,4‐ethylenedioxy)thienyl]‐2,5‐bis[6‐(1′‐butyl‐4,4′‐bipyridyl)hexyloxy]benzene tetrahexafluorophosphate (BEDOTPh‐2V) was synthesized and electropolymerized to form a viologen‐bearing conductive polymer [P(BEDOTPh‐2V)] film on an electrode surface. This polymer exhibits multicolor electrochromic beh…
Abstract Four compounds of the Bi 4 Ti 3 O 12 /BiFeO 3 system with the formula Bi 2 Bi n−1 (Ti,Fe) n O 3n+3 , n = 3, 4, 4.5 and 6 were studied using high‐temperature X‐ray powder diffraction and differential thermoanalysis methods. The crystal structure of the n = 6 phase was refined by the Rietveld method. An unusual…
Abstract In the field of thin‐layer‐structured inorganic nanotubes, morphological, structural, and chemical/physical modifications induced in synthetic stoichiometric chrysotile nanotubes have been evaluated as a function of the extent of Fe doping. Fe‐doped synthetic chrysotile nanocrystals have been obtained in the…
Abstract Polymer‐dispersed liquid crystals (PDLCs) are liquid‐crystal dispersions within a polymer matrix. These films can be changed from an opaque to a transparent state by applying a suitable alternating‐current electric field. PDLCs have attracted the interest of researchers for their applications as light shutter…
Free-volume theory for understanding depletion phenomena in mixtures of two species is generally derived using scaled-particle theory for those specific entities. Here we first give a general scaled-particle method for convex bodies in terms of the characteristic geometrical measures of the depletion agent, i.e., its…
In this paper, we describe the second-order nonlinear optical properties of a series of 1,3-dithiole-based electron donor-acceptor systems incorporating proaromatic donor and spacer groups. Modification of the proaromaticity of the quinoid spacer gives rise to NLO-phores with mubeta values ranging from -2000 x 10(-)(4…