Materials Literature
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This review revolves around the question which general distribution of scatterers (in a Euclidean space) results in a pure point diffraction spectrum. Firstly, we treat mathematical diffration theory and state conditions under which such a distribution has pure point diffraction. We explain how a cut and project schem…
This paper describes a photon-counting study of the cavitation luminescence produced by flow over a hydrofoil. This has previously been identified in water saturated with xenon. The four objectives of this study are: to determine whether luminescence can be obtained using air-saturated water; to quantify this emission…
The stability of charge ordered phases of bismuth based ${\mathrm{Bi}}_{0.5}{\mathrm{Ca}}_{0.5}{\mathrm{MnO}}_{3}$ and ${\mathrm{Bi}}_{0.5}{\mathrm{Sr}}_{0.5}{\mathrm{MnO}}_{3}$ oxides is investigated by magnetization measurements in magnetic fields up to 130 T. Marked differences exist when comparing the critical fie…
We have developed a multicomponent K–Er codoped silica-based sol-gel glass that presents high luminescence quantum yield (∼100 times larger than that of an Er-doped silica sol-gel glass) and long emission lifetime at 1.54 μm (17 ms). The glass was heat treated to melting temperature with the optical properties of the…
In this letter, we report a process for room-temperature assembly of patterned and periodic structures of carbon nanotubes (CNTs). Well-defined patterns with less than a 10-μm linewidth and variable thickness were readily deposited. The CNTs show long-range in-plane orientation ordering and adhere strongly to the subs…
We used a broadband, free-space, focused-beam system to measure the transmission and reflection in left-handed-material (LHM) slabs. The samples were made of alternating patterns of copper wires and split-ring resonators on Rogers 5880 substrates separated by Rohacell™ spacers. The measured data show very good agreeme…
A novel Gd(III) complex, GdDOTA-(BOM)4, has been prepared by a simple three-step procedure. The complex showed high T1-relaxivity values in serum albumin solutions, blood and plasma, resulting from high affinity for serum albumin. The T1-relaxivity in plasma, 67.4 s-1 mM-1 (20 MHz, 37 degrees C), makes it a promising…
The conversion of electrical energy into mechanical work plays an important role in robotics. In his Perspective, Baughman discusses new materials that may be used as actuators. He highlights the report of Weissmueller et al., who show how nanostructured platinum might eventually be used as electrochemical actuators t…
The absorption spectra of a series of compounds of the type [Mo(2)(DAniF)(3)](O(2)CXCO(2))[Mo(2)(DAniF)(3)] (DAniF = N,N '-di-p-anisylformamidinate) have been measured and revealed a strong dependence of the electronic transitions and, therefore, the colors upon the chemical nature of the dicarboxylate linker. The mor…
We have developed a novel method for site-selective deposition (SSD) of thin films using a seed layer. The deposition process of anatase TiO 2 from an aqueous solution was evaluated in detail using a quartz crystal microbalance, and it was found that the nucleation and initial growth of anatase TiO 2 were accelerated…
The spin engineering of CoxPd1−x alloy films on Pb(Zr0.52Ti0.48)O3 substrates was studied by measuring the polar Kerr rotation hysteresis loops and their electric field dependencies. The electric field dependence of polar Kerr rotation strongly depends on the composition of the CoPd alloys. This is especially so in th…
Self-redox decompositions of two cobalt−hydroxide−nitrates [Co II 0.80 Co III 0.20 (OH) 2.00 (NO 3 ) 0.14 (CO 3 ) 0.03 ·0.77H 2 O and Co II (OH) 1.50 (NO 3 ) 0.40 (CO 3 ) 0.05 ·0.05H 2 O] have been investigated with various analytical methods under an oxygen-free atmosphere. The investigated compounds all have a lamel…
Chirality from the crystal lattice: The achiral diarylethene 1 a crystallizes in a monoclinic chiral space group, that is, two different kinds of crystals, (M)-1 a and (P)-1 a, are obtained. Photoirradiation of (P)-1 a furnished optically pure closed-ring isomer (R,R)-1 b in the single crystal (see scheme). The photoc…
Optical measurements of the shear response of semidilute dispersions of polymer-dispersed multiwalled carbon nanotubes are presented. For a weakly elastic polymer melt, the data suggest that the semiflexible tubes orient along the direction of flow at low shear stress, with a transition to vorticity alignment above a…
Thin films of polystyrene (PS) and poly(methyl methacrylate) (PMMA) were spun-cast onto silicon substrates, annealed, and analyzed by atomic force microscopy (AFM), total electron yield (TEY), and partial electron yield (PEY) near-edge X-ray absorption fine structure (NEXAFS) spectroscopy in order to resolve conflicti…
The synthesis, luminescence properties, experimental determination and theoretical calculation of the emission quantum yield of Eu(NTA)3.2L complexes, where NTA is naphtoiltri-fluroacetone and L denotes H2O or DMSO (dimethyl sulphoxide), were reported. The compounds were characterized by elemental analysis (carbon, hy…
Bi 3.35 La 0.75 ( Ti 1−x W x ) 3 O 12 (BLTW) and Bi3.35La0.75(Ti1−xMox)3O12 (BLTM) (x=0.3%, 0.5%, 1%, and 2%) films were fabricated on Pt/Ti/SiO2/Si〈100〉 structures by a sol-gel method at 750 °C. The B-site substitution with high-valent cations, W6+ or Mo6+, in Bi3.35La0.75Ti3O12 (BLT) enhanced the remanent polarizati…
A (polymer network/nematic liquid crystal/chiral dopant) composite exhibiting a chiral nematic (N*) phase at room temperature has been developed. Because the helical twisting power of the chiral dopant increases with increasing temperature and the polymer network affects the molecular rearrangement of the liquid cryst…
CdSe nanocrystal thin films exhibit stable and quantitative electrochemical responses when treated with cross-linking molecules such as dithiols or diamines. For the first time, a voltammetric response is recorded for the reduction of the nanocrystals with quantitative injection of electrons in the 1S e state. Injecti…
Meissner fraction in the superconducting state of lead archaeological artifacts is used to evaluate the mass of the uncorroded metal in the sample. Knowing the total mass of the sample the mass of all corrosion products is established. It is shown that this mass correlates with the archaeological age of the lead artif…