Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTLayer-by-Layer Assembled Janus MicrocapsulesZhifeng Li, Daeyeon Lee, Michael F. Rubner, and Robert E. CohenView Author Information Department of Chemical Engineering and Department of Materials Science and Engineering and Center for…
l -Alaninium maleate (C 3 H 8 NO 2 + C 4 H 3 O 4 - ), a new organic nonlinear optical (NLO) material, is synthesized. Optical behavior such as UV−visible−NIR absorption spectra and second harmonic generation (SHG) were investigated to explore the NLO characteristics of the material for the first time. Thermal analysis…
BACKGROUND: We evaluated the effects of thermotherapy using magnetic nanoparticles, also referred to as magnetic fluid hyperthermia (MFH), combined with external radiation, in the Dunning model of prostate cancer. METHODS: Orthotopic tumors were induced in 96 male Copenhagen rats. Animals were randomly allocated to ei…
We investigate the stable structures of Fe-filled single-walled carbon nanotubes (SWNTs) on Ni(111), using density functional theory calculations. We find stable geometries and electronic states for the nanotube on Ni(111). We propose the possibility that the C-C bonds of carbon nanotube are broken by Fe wire and Ni s…
Thiourea has exhibited extremely rich dynamical behavior when being oxidized either through a chemical approach or via an electrochemical method. In this study, thermodynamic properties of thiourea and its oxides are investigated by measuring their thermogravimetry (TG), differential thermogravimetry (DTG), and differ…
Plastic flow behavior of low carbon steel has been studied at room temperature during tensile deformation by varying the initial strain rate of 3.3x10e-4 1/sec to the final strain rate ranging from 1.33x10e-3 1/sec to 2.0x10e-3 1/sec at a fixed engineering strain of 12%. Haasen plot revealed that the mobile dislocatio…
Two sets of amorphous carbon materials prepared at different routes are irradiated with swift (145 MeV) heavy ion (Ne6+). The structural parameters like the size of ordered grains along c and a axis i.e. Lc & La, the average spacing of the crystallographic planes (002) i.e. d002 and the fraction of the amorphous phase…
The unique properties of nanocomposites have seen them creating the next revolution in materials science. Their quantal properties as a result of their size have given them unique physical characteristics, previously not possible because of classical physical laws. There is now evidence that these may also extend into…
Recently, we reported the isothermal crystallization behaviors of poly( l -lactic acid) (PLLA) from the melt and glassy states, respectively [ J. Phys. Chem. B 2004, 108, 11514; Macromolecules 2004, 37, 6433]. Surprisingly, the quite different infrared (IR) spectral evolutions occur in the two crystallization processe…
Phase formation behaviors of double perovskite Sr 2 FeMoO 6 (SFMO) derived from mechanical activation were investigated. Polycrystalline double perovskite SFMO of grain sizes in nanometer range were synthesized by heat treatment of the precursors derived from mechanical activation of SrO, Fe 2 O 3 , and MoO 3 at tempe…
Abstract I want to thank H. Gajewski for many years of fruitful collaboration and his continuous encouragement, K. Gärtner We are interested in finite volume discretization schemes and numerical solutions for a nonlocal phase segregation model, suitable for large times and interacting forces. Our main result is a sche…
MgAl 2 O 4 spinel precursor was prepared using a heterogeneous sol–gel process. The effect of high‐energy milling on the precursor decomposition and spinel formation was investigated. The milling decreased the Al(OH) 3 dehydroxylation temperature from 190° to about 130°C. The activation energy for spinel formation dec…
Titania microtube arrays were fabricated by replication of human hair. The microtube is nanoporous in its wall and has nanoporous platelets on its outer surface, which were derived from cuticle cells on hair surface. The wall thickness of titania microtubes could be controlled by adjusting the number of sol–gel cycles…
We propose and demonstrate a low cost technique to fabricate submicrometer sieves using the association of laser interference lithography and nickel electroforming. The sieves are fabricated on glass substrates and are released from the substrate by adding a hexagonal sustaining structure, electroformed in nickel, usi…
The phases formed in the ternary system (Na 1/2 Bi 1/2 )TiO 3 –Bi 4 Ti 3 O 12 –BaTiO 3 (NBT–BTO–BT) were studied at 1150°C in air. A very accurate picture of the ternary phase diagram was obtained examining almost 90 different compositions, exploiting low‐angle XRD analyses to study the layer compounds. New compounds…
X-ray microdiffraction utilizing Fresnel zone plate focusing optics has been used to study microstructural properties of individual 90\ifmmode^\circ\else\textdegree\fi{} ferroelectric domains in ${\mathrm{BaTiO}}_{3}$. Diffraction measurements at a microfocused spot resolution of $0.3\text{ }\text{ }\ensuremath{\mu}\m…
We demonstrate that the finite rate of dielectric relaxation in liquid crystals which has been ignored previously causes profound effects in the fast dielectric reorientation of the director. We propose a theory of dielectric response in which the electric displacement depends not only on the present (as in the standa…
Transparent lanthanum‐doped lead zirconate titanate (PLZT) ceramics with high density were fabricated using spark plasma sintering (SPS), a recently developed hot‐pressing method. A wet–dry combination method was used to prepare the fine PLZT powders. The average grain size of the PLZT ceramics was less than 1 μm, bec…
Electrically-fused quartz glass, flame-fused quartz glass and plasma-fused quartz glass as well as synthetic fused silica samples were irradiated stepwise with a high energy Xe barrier discharge excimer lamp at 172 nm. VUV spectra were measured before and after every irradiation step. The results show that the VUV tra…
The addition of hydrogen atoms to models or experimental structures of proteins that contain only non-hydrogen atoms is a common step in crystallographic structure refinement, in theoretical studies of proteins, and in protein structure prediction. Accurate prediction of the hydrogen positions is essential, since they…