Materials Literature
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We present a detailed magnetic study of the ${\mathrm{Pr}}_{1∕3}{\mathrm{Ca}}_{2∕3}\mathrm{Mn}{\mathrm{O}}_{3}$ manganite, where we observe the presence of small ferromagnetic (FM) domains (diameter $\ensuremath{\sim}10\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}}$) immersed within the charge-ordered antiferromagnetic (AF…
Abstract Magnetic nanoparticles embedded in polymer matrices are good examples of functional nanostructures with excellent potential for applications such as electromagnetic interference shielding, magneto‐optical storage, biomedical sensing, flexible electronics, etc. Control over the dispersion of the nanoparticle p…
Recent theory has found that native defects such as the O vacancy V(O) and Zn interstitial Zn(I) have high formation energies in n-type ZnO and, thus, are not important donors, especially in comparison to impurities such as H. In contrast, we use both theory and experiment to show that, under N ambient, the complex Zn…
The hierarchical self-assembly of disc-shaped molecules leads to the formation of discotic liquid crystals. These materials are of fundamental importance not only as models for the study of energy and charge migration in self-organized systems but also as functional materials for device applications such as, one-dimen…
For the first time, stable aqueous dispersions of polymer-coated graphitic nanoplatelets can be prepared via an exfoliation/in-situ reduction of graphite oxide in the presence of poly(sodium 4-styrenesulfonate).
The interactions of Cu(II)-meso-Tetrakis(n-N-methylpyridiniumyl)porphyrin (n = 2,3,4), respectively referred to as o-, m- and p-CuTMPyP, and DNA, poly<TEX>$[d(A-T)_2]$</TEX> and poly<TEX>$[d(G-C)_2]$</TEX> were investigated by circular and linear dichroism (CD and LD). In the o-CuTMPyP case, in which the rotation of t…
ZnSe/ZnS, UV-blue luminescent core shell quantum dots, were synthesized via a thermal decomposition reaction of organometallic zinc and solvent coordinated Selenium (TOPSe) in a hot solvent mixture. The synthetic conditions of the core (ZnSe) and the shell (ZnS) were independently studied at various reaction temperatu…
Rubber materials have good physical properties by crosslinking.Crosslink density of a rubber vulcanizate determines the physical properties. 1 By increasing the crosslink density, the modulus, hardness, resilience, and abrasion resistance increase, whereas the elongation at break, heat build-up, and stress relaxation…
Assembly of hybrid mesophases through the combination of amphiphilic block copolymers, acting as structuredirecting agents, and silicon sources using low acid catalyst concentration regimes is a versatile strategy to produce large quantities of high-quality ordered large-pore mesoporous silicas in a very reproducible…
We theoretically study the intraband transition spectrum of single electron transistors (SETs) composed of individual self-assembled quantum dots. The polarization of SETs is obtained by using the nonequilibrium Green's function technique and the Anderson model with three energy levels. Owing to nonradiative coupling…
Using the Green's function formalism, an ab initio theory for band structures of crystals is derived starting from the Hartree-Fock approximation. It is based on the algebraic diagrammatic construction scheme for the self-energy which is formulated for crystal orbitals (CO-ADC). In this approach, the poles of the Gree…
Initial, S(0), as well as coverage-dependent adsorption probability measurements, S(Theta), have been conducted at normal impact angle and as a function of the impact energy of CO(2), E(i), adsorption temperature, T(s), and copper precoverage, Theta(Cu) (at 300 K). S(0), which decreased from approximately 0.4 exponent…
44 samples of tetragonal hen egg-white lysozyme (HEWL) were obtained as a series of polycrystalline precipitates at 277 K and room temperature in the pH range between 6.56 and 3.33. The precipitates were investigated by the collection of high-resolution powder X-ray diffraction data at 295 K, which reveal the tetragon…
A new octacationic macrocycle, tetrakis-2,3-[5,6-di{2-(N-methyl)pyridiniumyl}pyrazino]porphyrazine, was obtained in its hydrated form as the water-soluble iodide salt. This compound, abbreviated as [(2-Mepy)(8)TPyzPzH(2)](I(8)).8H(2)O (2-Mepy = 2(N-methyl)pyridiniumyl moiety), was obtained by demetalation of the corre…
Gold nanocrystal dispersions in toluene−CO 2 mixtures were infused into cylindrical pores in mesoporous silica to achieve high loadings over 2 wt % in 24 h. The nanocrystals were highly dispersed according to transmission electron microscopy, and the loadings approached equilibrium. In contrast, the loadings were smal…
This paper reports on the synthesis of an amphiphilic miktoarm ABC star-shaped copolymer, s[(PEO)(PMLABz)(PCL)], consisting of biocompatible/bioresorbable arms. Indeed, PEO is a hydrophilic biocompatible poly(ethylene oxide) arm, PMLABz is a poly(benzyl β-malolactonate) arm precursor of a pH-sensitive bioresorbable po…
We present results of a systematic high-resolution transmission electron microscopy study of the thermal evolution of bundled single-walled carbon nanotubes (SWNTs) subjected to approximately 4-h high-temperature heat treatment (HTT) in a vacuum at successively higher temperatures up to 2200 degrees C. We have examine…
The crystal structure of the At4g34215 protein of Arabidopsis thaliana was determined by molecular replacement and refined to an R factor of 14.6% (R(free) = 18.3%) at 1.6 Angstroms resolution. The crystal structure confirms that At4g34215 belongs to the SGNH-hydrolase superfamily of enzymes. The catalytic triad of th…
The mono-, di-, and triamino-substituted cyclic phenylazomethine (CPA) and diamino-substituted linear phenylazomethine (OPA) were synthesized in one-step via dehydration of aromatic amine and ketone in the presence of titanium tetrachloride. The linear and branched aromatic polyamides were prepared by the direct polyc…
We report the synthesis of a new stoichiometric Yb compound, Rb 3 Yb 2 (PO 4 ) 3, by high-temperature solution methods. This is the first material of the A 3 I B 2 III (X V O 4 ) 3 family containing a lanthanide element and the only one that shows optical activity. We resolved the structure of Rb 3 Yb 2 (PO 4 ) 3, whi…