Materials Literature
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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…
We argue that the presence of dissociated ions in block copolymers under electric fields can induce strong morphological changes and even lead to phase transitions. We investigate, in particular, diblock copolymers in the body centered cubic (bcc) phase. In pure dielectric materials (no free charges), a dielectric bre…
Spin doctoring: [FeIIH3L][FeIIIL](NO3)2, where H3L is a hexadentate tripod ligand bearing three imidazole groups, is formed in a one-pot assembly reaction, and is shown to be a homochiral mixed-valence spin-crossover compound. The structure consists of a 2D assembled sheet that is held together by imidazole–imidazolat…
Scanning tunneling microscopy can be utilized to individually probe single-molecule magnets that have been deposited on gold substrates (see schematic). Dilute solutions (in THF/H2O/NH4OH) of a dodecamanganese(III,IV) cluster surrounded by acetyl-protected thiol groups, [Mn12O12(L)16(H2O)4], have been used to prepare…
Three new luminescent and redox-active Ru(II) complexes containing novel dendritic polypyridine ligands have been synthesized, and their absorption spectra, luminescence properties (both at room temperature in fluid solution and at 77 K in rigid matrix), and redox behavior have been investigated. The dendritic ligands…
The electronic properties of the cleavage InAs(110) surface are studied using a semi-empirical tight-binding method which employs an extended atomic-like basis set. We calculate the surface electronic band structure which is studied as a function of the structural parameters of the surface. We describe and discuss the…
Atomic models of zigzag (n, 0)- and armchair (n,n)-like NiCl2 nanotubes (n = 4 - 29) formed by rolling (100) single layers of the bulk NiCl2 which crystallizes in the CdCl2-type structure, are constructed and their electronic properties and bond indices are investigated using the tight-binding band theory. The calcula…