Materials Literature
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A ferrimagnet with a 3D molecular network (depicted) has been synthesized and characterized. The compound is composed of units of mixed-valence Mn4 clusters, a unit that is well known for its single-molecule magnet properties, and MnII paramagnetic units. Both building blocks are linked by a dicyanamide bridging ligan…
Single-walled carbon nanotubes have been reacted with osmium tetroxide (OsO(4)) in solution in the presence of O(2) and UV irradiation at 254 nm. We observe one main structural motif, namely thickly coated nanotube structures, densely covered with OsO(2), consisting of multiple bundles of derivatized tubes. In a few i…
When multilayer films are built up with polycations and polyanions, their thickness can grow either linearly or exponentially with the number of deposited layer pairs, depending for example on the nature of the polyelectrolytes used. We investigate in the present work the construction of a film using a binary mixture…
The thermal conductivities of 40 pyrochlores with the composition A2B2O7 (A = La, Pr, Nd, Sm, Eu, Gd, Y, Er or Lu; B = Ti, Mo, Sn, Zr or Pb) are predicted by molecular dynamics simulations. The trends in the behaviour can be fully understood in terms of the differences in the density and the speed of sound in the mate…
Optical properties of the deposited gold films are discussed in connection with the Casimir force prediction. Voids in the films and electron scattering on the grain boundaries reduce the force at small separations on the 2% level in comparison with the bulk material prediction. The contribution of the patch potential…
A rational representation for the self-energy is explored to interpolate the solution of the Anderson impurity model in general orbitally degenerate case. Several constrains such as the Friedel's sum rule, high--frequency moments and the value of quasiparticle residue are used to establish the equations for the coeffi…
Self-immolative dendrimers have recently been developed and introduced as a potential platform for a multi-prodrug. These unique structural dendrimers can release all of their tail units, through a self-immolative chain fragmentation, which is initiated by a single cleavage at the dendrimer's core. Incorporation of dr…
This study addresses the electrical and optical properties of radio frequency magnetron sputtered aluminum doped zinc oxide (ZnO:Al) films. The main focus was on the improvement in carrier mobility μ to achieve simultaneously high transparency for visible and particularly near-infrared light and low resistivity. The i…
The largest single-molecule magnet (SMM) to date has been prepared and studied. Recrystallization of known [Mn(12)O(12)(O(2)CCH(2)Bu(t))(16)(H(2)O)(4)] (1; 8Mn(III), 4Mn(IV)) from CH(2)Cl(2)/MeNO(2) causes its conversion to [Mn(30)O(24)(OH)(8)(O(2)CCH(2)Bu(t))(32)(H(2)O)(2)(MeNO(2))(4)] (2; 3Mn(II), 26Mn(III), Mn(IV))…
Neural progenitor cells were encapsulated in vitro within a three-dimensional network of nanofibers formed by self-assembly of peptide amphiphile molecules. The self-assembly is triggered by mixing cell suspensions in media with dilute aqueous solutions of the molecules, and cells survive the growth of the nanofibers…
Abstract Novel nano-structured clays were synthesized from cation exchange reaction by the intercalation of rhodium complexes with ligand spacers into clay. Expansion of interlayer space of the modified clays depends on the spacers. A unique conformation of pillar complexes was detected by cross polarization magic ang…
We have used metalorganic chemical vapor deposition to deposit thin GaInP2 passivating films on both isolated and close-packed arrays of colloidal InP/GaInP2 core-shell nanocrystals. Conformal GaInP2 layers of 10–20 nm were grown on the nanocrystals after organic capping molecule removal by a thermal annealing treatme…
Abstract By using a powerful synchrotron X-ray radiation, lattice deformation of strain-induced crystallites in carbon-black-filled natural rubber with nominal stress was clarified. The degree of deformation of the unit cell became smaller by filling with carbon black. This result implies that as some local stress was…
A scaleable and site-specific patterning approach with individual addressability is demonstrated via an electropolymerization process within the gap of electrodes. The method can pattern conducting polymer structures by applying a bias between desired electrodes in a monomer vapor. The reaction is proposed to happen i…
A brief review is given of the development of phosphors for solid-state lighting and the properties of new materials that are being developed for this emerging technology to achieve higher efficiencies, full color rendition and ultra-long life characteristics.
A series of biodegradable amphiphilic graft polymers were successfully synthesized by grafting poly(2,2-dimethyltrimethylene carbonate) sequences onto a water-soluble polymer poly-α,β-[N-(2-hydroxyethyl)-L-aspartamide] (PHEA) backbone. We established the feasibility of preparing these novel graft polymers by the ring-…
Two-dimensional extremely thin single-crystalline α-Si3N4 microribbons have been achieved in bulk via a thermal decomposition nitridation. The α-Si3N4 microribbons have small thicknesses of ∼10–20 nm, large widths of ∼10–25 μm and long lengths ranging from several hundred micrometers to the order of millimeters, and h…
Abstract The electrochemical characteristics of a series of heteroleptic tris(phthalocyaninato) complexes with identical rare earths or mixed rare earths (Pc)M(OOPc)M(OOPc) [M = Eu...Lu, Y; H 2 Pc = unsubstituted phthalocyanine, H 2 (OOPc) = 3,4,12,13,21,22,30,31‐octakis(octyloxy)phthalocyanine] and (Pc)Eu(OOPc)Er(OOP…
The interactions of electron beams (e− beam) with ferroelectric oxides based on lead zirconate titanate have been quantified. The beam energy and dose dependencies of surface charge have been manipulated to influence local polarization orientation. The mechanism of ferroelectric domain polarization of 100 nm grains in…
We present a theoretical investigation on the structural and electronic properties of isolated nickel impurities in diamond. The atomic structures, symmetries, formation and transition energies, and hyperfine parameters of isolated interstitial and substitutional Ni were computed using ab initio total energy methods.…