Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTZinc oxide: an outstanding example of a binary compound semiconductorWolfgang H. HirschwaldCite this: Acc. Chem. Res. 1985, 18, 8, 228–234Publication Date (Print):August 1, 1985Publication History Published online1 May 2002Published inissue 1 August 1985https://pubs.acs.org/…
The detailed study of optical transmittance and reflectance in Al-doped ZnO thin films prepared by rf magnetron sputtering is described. Films obtained with Al 2 O 3 content up to 10 wt% showed an average transmittance above 85% in the visible range. The absorption edge was blue-shifted with increasing carrier concent…
The experimental evaluation of the parameters of a general stochastic model for the initiation of pitting corrosion on stainless steels is described. The variation of these parameters with experimental conditions is used in the development of a microscopic model. A microscopic model which accords with the observed beh…
Abstract Effective chain extenders for linear polyesters were investigated among some bis‐heterocycles, which were capable of coupling carboxyl terminals of the polyesters through addition reaction. Consequently, 2,2′‐bis(2‐oxazoline), 2,2′‐bis(5,6‐dihydro‐4H‐1,3‐oxazine) and N , N′ ‐hexamethylenebis(carbamoyl‐2‐ oxaz…
Abstract The infrared amide I band of collagens (rat and cod skin) and related compounds (polyproline, polyglycine, and polytripeptides) was studied. Assignment of amide I‐band components for polyproline II and polytripeptides (Gly‐Pro‐Pro) n and (Gly‐Pro‐Gly) n in the solid state and water solution was made. Three am…
An experimental study of the liquidus projection in a phase diagram of the Nd-Fe-B ternary system has been carried out. In the Nd-poor region, it is found that two phases, Fe 2 B and Nd 2 Fe 7 B 6 (T 2 ), coexist with the liquid. Two monovariant curves, L\rightleftharpoonsFe+Fe 2 B and L\rightleftharpoonsFe 2 B+T 2 ,…
A new method to measure thermal diffusivity of a thin sample was developed using a light-irradiated ac calorimetric technique. The experimental conditions and the fundamental equations for the measurement are discussed. In principle, this method can be applied no matter how thin a sample may be. This method was tested…
Chemisorption of small molecules is often used as a probe for By probing the surface properties of transition metal oxides. the interaction of molecules with the surface, information is often obtained on the oxidation state, the coordination symmetry, the degree of coordination unsaturation of the surface cations, the…
This article reviews published data on the mechanical properties of additively manufactured metallic materials. The additive manufacturing techniques utilized to generate samples covered in this review include powder bed fusion (e.g., EBM, SLM, DMLS) and ...Read More
▪ Abstract The phase-field method has recently emerged as a powerful computational approach to modeling and predicting mesoscale morphological and microstructure evolution in materials. It describes a microstructure using a set of conserved and ...Read More
A stochastic model for pit initiation is developed, involving as parameters an initiation frequency for pit nuclei, a death probability for unstable pits, and a critical age which defines the transition between a stable and an unstable pit. Emphasis is placed on validating methods for data analysis to recover the para…
A method is presented for finding particular normal modes for large molecules such as proteins and nucleic acids. The method is based on an iterative approach that extracts eigenvectors of interest from the full second-derivative matrix. Application of the method to the interdomain (hinge-bending) motion of lysozyme y…
We present ab initio Hartree–Fock and valence effective Hamiltonian (VEH) calculations on polyparaphenylene, polypyrrole, and polythiophene dimers and polymer chains. These polymeric materials are among the most studied compounds in the field of conducting polymers. We examine, as a function of the torsion angle betwe…
A simple, sensitive, and quantitative procedure is described for the measurement of collagen and protein content in tissue sections prepared from formalin-fixed paraffin-embedded samples. The method can detect as little as 5.7 micrograms of collagen per mg of protein. It is based on the selective binding of Sirius red…
The current state of experimental and theoretical research into cooperative phenomena in crystals containing off-center ions is reviewed. This field has attracted considerable attention in recent years because of the general interest in disordered systems, including spin glasses of which dipole glass is the electric a…
This review describes the present status of research on the blue phase of cholesteric liquid crystals—a phase state of liquid crystals with unusual properties, whose order parameter exhibits three-dimensional spatial periodicity and which appears in a narrow temperature interval (of the order of 1°). Experimental resu…
Tight divalent metal binding sites in Escherichia coli F1-adenosinetriphosphatase (F1-ATPase) were studied. Native enzyme contained two Mg per F1, confirming previous results. All of the Mg may be replaced by Co or Mn using a dissociation-repolymerization procedure. The substituted enzymes are homogeneous and contain…
The electrical small-polaron (SP) conductivity of Fe 3 O 4 is calculated above the Verwey transition taking into account the polaronic short-range order. It is shown that the conductivity results from the superposition of SP band and SP hopping conduction. Concerning the DC conductivity below room temperature, the SP…
The authors present electronic-structure calculations on chain-like compounds modelling the various microscopic components present in hydrogenated amorphous carbon (a-C:H) films. They demonstrate that the electronic properties are mainly governed by the graphitic component. They describe the influence of polyethylenic…
We show that in contrast to the secondary-electron intensity distribution, the spin polarization, P(E), yields useful information about the electron-electron interaction. The ratio of lifetimes of majority- to minority-spin electrons can be determined directly from the measured values of P(E) by ${\mathrm{\ensuremath{…