Materials Literature
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The Protein Crystallography Station (PCS) at Los Alamos Neutron Science Center is a high-performance beamline that forms the core of a capability for neutron macromolecular structure and function determination. Neutron diffraction is a powerful technique for locating H atoms and can therefore provide unique informatio…
Abstract In this paper, chalcopyrite AgInS 2 nanorods were synthesized for the first time by a one‐step, ambient pressure, environment friendly organic molten salt (OMS) method at 200 °C. The as‐synthesized products were characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive…
The dynamics of a strain-induced resistive phase transition in a ${\text{VO}}_{2}$ thin film was studied by using a low-frequency crystal bending stage. It was found that the resistance response of the film to strain excitation is determined by two time constants, interpreted as a nucleation lifetime, in the ${10}^{\e…
Defined face-to-face structures of phthalocyanine and porphyrin chromophores can be prepared using a modular strategy that allows directional, stepwise construction. μ-Oxo linkage between the central group of 14 metalloid atoms Si and Ge ensures π-overlap between the macrocycles, and exciton coupling effects further e…
We have investigated coadsorption of H 2 O and O ad on the stepped Pt(533) surface using temperature-programmed desorption in combination with isotope exchange. Water desorption from both bare and oxygen precovered Pt(533) gives rise to three easily identifiable peaks in the TPD spectrum between 140−210 K. Only in coa…
The ${\text{As}}_{2}{\text{S}}_{3}$ melt at room pressure represents a liquid having a three-dimensional network structure, semiconducting properties, and a huge viscosity. We have found that under high pressure a considerable change in the medium and short-range structure of this liquid is observed. Intermediate-rang…
<div class="section abstract"><div class="htmlview paragraph">Diesel particulate samples were collected from a light duty engine operated at a single speed-load point with a range of biodiesel and conventional fuel blends. The oxidation reactivity of the samples was characterized in a laboratory reactor, a…
A novel blue-emitting phosphor, Eu(2+)-doping Al(4)B(2)O(9), was prepared via a modified solid-state reaction. Al(4)B(2)O(9):Eu(2+) nanoparticles with diameters varying in a range from 20 to 50 nm were obtained using urea as an auxiliary reagent at the optimum temperature of 850°C. The crystallization and particle siz…
Multishell nanospheres have been proposed as a class of layered alternating metal-dielectric probes (LAMPs) that can greatly enhance sensitivity and multiplexing capabilities of optical molecular imaging . Here we theoretically demonstrate that the interplasmonic coupling within these spheres and hence their spectral…
ZnFe 2 O 4 nanoparticles have been prepared encased into sepiolite and faujasite matrixes. Transmission electron microscopy (TEM) images show hosted particles from 1 to 3 nm. From the zero field cooling (ZFC) and field cooling (FC) magnetic susceptibility data, the blocking temperatures distribution has been obtained,…
We prepared silica nanotube with nanochannel-wall in the columnar pores of a commercial anodic alumina membrane (F127-MST), and then made up an artificial biomembrane consisting of a hierarchical structure by introducing an enzyme, formaldehyde dehydrogenase, into the silica nanochannels. The formaldehyde dehydrogenas…
Face-centered cubic single crystals of $\ensuremath{\sigma}=1.55\text{ }\ensuremath{\mu}\text{m}$ diameter hard-sphere silica colloidal particles were prepared by sedimentation onto (100) and (110) oriented templates. The crystals had a wide interface with the overlaying liquid that was parallel to the template. The l…
A series of three dicyanovinyl (DCV)-substituted oligothiophenes (referred to collectively as DCV-nT-DCV, where n = 1−3) were prepared and their electrochemical and structural properties were examined. The introduction of this group results in favorable structural features: planarity, π-stack formation, and close inte…
Stable polymer-functionalized oil-in-water emulsion droplets are prepared with precise surface compositions, which are defined by that of the branched copolymer surfactant. The influence of composition, specifically ratios of methacrylic acid (MA) to ethylene glycol (EG), on acid-triggered inter-polymer/inter-droplet…
We report an x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD) study of a $5.4\text{ }\text{at}\text{.}\text{ }\mathrm{%}$ Co-doped indium tin oxide (ITO) thin film shown to exhibit ferromagnetism beyond room temperature. The XAS spectra at the $\text{Co}\text{ }{L}_{2,3}$ edge reveal pr…
In this report, the current state of computational studies on crystalline cellulose is reviewed. The discussion is focused on fully atomistic molecular-dynamics simulations as well as on other computational approaches which are relevant in the context of enzymatic degradation of cellulose. Finally, possible directions…
( RS )-2-Chloromandelic acid is a new example of chiral compounds that can exist as a racemic compound or a conglomerate depending on the crystallization conditions. Two polymorphic racemic compounds and one conglomerate were disclosed and characterized in this work. Commercially available racemic compound Form α can…
Stable aqueous suspensions of phospholipid-coated superparamagnetic Fe3O4 nanoparticles, or magnetoliposomes (MLs), were prepared and were separated by magnetic chromatography into size monodisperse fractions over a broad size range (50–130 nm). This development facilitated the first study of the size dependence of th…
Heterobimetallic supramolecular polymers were prepared by treatment of the supramolecular polymers composed of tris(spiroborate) type molecular connecting modules with a potassium cation. On the other hand, the addition of a barium cation led to dissociation of the supramolecular polymer chain. Modulation of polymer f…
Spin fluctuations are considered to be one of the candidates that drive a sign-reversed ${s}^{\ifmmode\pm\else\textpm\fi{}}$ superconducting state in the iron pnictides. In the magnetic scenario, whether the spin-fluctuation spectrum exhibits certain unique fine structures is an interesting aspect for theoretical stud…