Materials Literature
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We demonstrate that the half-doped bilayer manganite La_{1}Sr_{2}Mn_{2}O_{7} exhibits CE-type charge-ordered and spin-ordered states below $T_{N, CO}^A = 210$ K and below $T_{N}^{CE} \sim 145$ K, respectively. However, the volume fraction of the CE-type ordering is relatively small, and the system is dominated by the…
The microstructure and domain structures of high performance temperature-compensated sintered magnets with composition of Sm0.56GdxDy0.44−x(TM)7.22 (TM=Co0.68Fe0.22Cu0.08Zr0.02)7.22 (0.0⩽x⩽0.4) have been investigated by using electron microscopy and magnetic force microscopy. Both microstructure and magnetic propertie…
Low-energy electron diffraction intensity vs voltage (LEED I-V) measurements and analysis are used to determine the multilayer surface relaxation of W(110). Measurements and analysis are presented for both flat and vicinal surfaces, demonstrating that surface roughness leads to only small errors in LEED structure dete…
The nature of the interaction between highly oriented pyrolitic graphite (HOPG) and adsorbed Ti is examined by soft x-ray photoelectron spectroscopy. By monitoring the C $1s$ signal, it is found that Ti does not chemically bond to, but only interacts through the Van der Waals force with, a pristine HOPG surface. Time-…
Recent studies with the anthracycline Adriamycin have demonstrated its activation by formaldehyde and subsequent binding to DNA in vitro. Since formaldehyde levels are known to be higher in cells of myeloid origin and the structurally related drug mitoxantrone is most effective against cancers of myeloid origin, this…
We study the effect of wall–fluid interactions on the state conditions and the effective properties of a model dodecane fluid confined between parallel solid walls. A significant increase in the effective density of the confined fluid is observed with increasing strength of the wall–fluid interaction. The effect of th…
We report the results of magnetization measurements on powder samples of [NiCu(pba)(D 2 O) 3 ]·2D 2 O (pba=1,3-propylenebis(oxamato),C 7 H 6 N 2 O 6 ) and [Ni(dpt)(H 2 O)Cu(pba)]·2H 2 O (dpt=bis-(3-aminopropyl)amine, C 6 H 17 N 3 ), which are regarded as the S =1/2 and 1 ferrimagnetic chain and dimer, respectively. Th…
Transparent, conductive indium tin oxide (ITO) films were fabricated by pulsed-laser deposition on substrates held at room temperature. We investigated the relationship between electrical/optical properties of the films and the material stoichiometry, measured by Rutherford backscattering. The lowest resistivity films…
Using the sol–gel method, PbTiO3 films of 21, 64, 128, 210, 310, and 420 nm thicknesses were obtained on (0001) sapphire. Raman scattering and x-ray diffraction techniques were used to study the correlation between the film thickness and the structural changes on these films. The Raman and x-ray intensities in 21 nm f…
We demonstrate compaction of DNA with nanoscale biomimetic constructs which are robust synthetic analogs of globular proteins. These constructs are approximately 15 nm in diameter, shell crosslinked knedel-like (SCKs) nanoparticles, which are prepared by covalent stabilization of amphiphilic di-block co-polymer micell…
Porous silicon Fabry-Pérot optical filters with reflectivity peaks in the visible and near infrared spectral range have been manufactured electrochemically and characterized with variable angle spectroscopic ellipsometry. Generalized ellipsometry and the Bruggeman effective medium approximation were employed to study…
The DNA binding domain of H-NS protein was studied with various N-terminal deletion mutant proteins and identified by gel retardation assay and heteronuclear 2D- and 3D-NMR spectroscopies. It was shown from gel retardation assay that DNA binding affinity of the mutant proteins relative to that of native H-NS falls in…
Fluorinated ether ketone oligomers bearing a crosslinkable ethynyl group at the chain end have been investigated for low-loss polymer optical waveguide devices. These oligomers are designed to achieve low birefringence and were synthesized by the reaction of 4,4′-(hexafluoroisopropylidene)diphenol with an excess decaf…
During ion etching (IE) processes used for making a Pt electrode in the fabrication of ferroelectric capacitors, the film is exposed to radiation and energetic ion bombardment. The influence of such processes on polarization-electric field characteristics of lead zirconate titanate thin film capacitor has been reporte…
The effect of the density of states on the lifetime of low-energy electrons in metals has been studied using a golden rule approach. Simple approximations to the real density of states of metals have been used allowing analytical results, which show that the free-electron scaling $(E\ensuremath{-}{E}_{F}{)}^{\ensurema…
As previously reported, a selectively strong green emission due to the Ho3+: (5F4, 5S2)→5I8 transitions is observed in Nd3+–Ho3+ co-doped ZrF4-based fluoride glasses under 800 nm excitation. As an attempt to more enhance Ho3+ up-conversion luminescences in the Nd3+–Ho3+ co-doped ZrF4-based glasses, Yb3+ ions were adde…
A study of resonant-x-ray scattering in a charge-ordered perovskite manganese oxide ${\mathrm{Nd}}_{1/2}{\mathrm{Sr}}_{1/2}{\mathrm{MnO}}_{3}$ was performed. Dipole-resonant superlattice reflections originating from the orderings of the charge and orbital with ${Q}_{\mathrm{charge}}=(0,1,0)$ and ${Q}_{\mathrm{orbital}…
In the finite field (FF) treatment of vibrational polarizabilities and hyperpolarizabilities, the field-free Eckart conditions must be enforced in order to prevent molecular reorientation during geometry optimization. These conditions are implemented for the first time. Our procedure facilities identification of field…
We have investigated the charge-density distribution of an antiferromagnetic bi-layered manganite, NdSr 2 Mn 2 O 7 , by the maximum entropy method (MEM) using the synchrotron X-ray powder data. The magnetic structure below T N =150 K is known to be a layered-type (A-type). We have found a significant change of the ele…
The interfacial effect of the fluid phase on the growth morphology of crystals is very difficult to describe. This is particularly so for crystallization systems with complicated growth units. Based on newly developed morphological theories, a new approach, the so-called interfacial structure (IS) analysis is develope…