Materials Literature
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In the past decade, a wide variety of ZnO crystals were prepared through wet chemical processing. However, the fundamentals of the nanoscale morphological variation of ZnO crystals on the crystal growth in aqueous solution systems have not been sufficiently studied. This paper is a review of the various morphologies o…
Sonochemical synthesis of zeolite A has been conducted by ultrasonic irradiation of mixtures of metakaolinite and NaOH solution. The hydrothermal synthesis at conventional synthesis conditions was undertaken to determine the sonochemical reliability. The enhancement of nucleation and crystallization rate of zeolite A…
A dianionic phenoxyamido ligand was the first to be used to stabilize organo-rare-earth metal amido complexes. Amine elimination reaction of Nd[N(TMS)(2)](3)(μ-Cl)Li(THF)(3) (TMS = SiMe(3)) with aminophenol [HNOH] {[HNOH] = N-p-methylphenyl(2-hydroxy-3,5-di-tert-butyl)benzylamine} in a 1 : 1 molar-ratio gave the anion…
Graft coatings of poly(N-isopropylacrylamide) (pNIPAM) are of considerable interest for the reversible control of bio-interfacial interactions. In this study, graft coatings were prepared by free radical polymerisation from surface-bound polymerisable groups, on silicon wafers and quartz crystal microbalance (QCM) sen…
Includes bibliographical references and index. | xv, 363 p. | ill. | 25 cm.
Apatite-type oxide-ion conductors have attracted considerable interest as potential fuel cell electrolytes. Atomistic modelling techniques have been used to investigate oxygen interstitial sites, protonic defects and water incorporation in three silicate and three germanate-based apatite-systems, namely La8Ba2(SiO4)6O…
Two organic–inorganic hybrid one dimensional (1D) sulfides [Mn(en)2(H2O)][Mn(en)2MnGe3S9] (1) and [Mn(en)2]2Sn2S6 (2) (en = ethylenediamine) have been prepared under solvothermal conditions and characterized by single-crystal X-ray diffraction. Metal–amino complexes play different roles in preparing these two compound…
A quadrature-rule type approximation of the quasi-continuum method for atomistic mechanics is presented. Simple analysis and computational experiments are presented that illustrate that the new method has, for the same accuracy, lower complexity compared to not only the quasi-continuum method, but also to cluster-type…
Research Article| January 01, 2010 The Minnesota Density Functionals and their Applications to Problems in Mineralogy and Geochemistry Yan Zhao; Yan Zhao Commercial Print Engine Lab, HP Labs, Hewlett-Packard Co., 1501 PageMill Road Palo Alto, California 94304, U.S.A., yan.zhao3@hp.com Search for other works by this au…
The self aggregation behaviour of meso-tetraarylporphyrins containing two carboxyphenyl units in adjacent and opposite positions, respectively, 5,10-bis(4-carboxyphenyl)-15,20-diphenylporphyrin (DiCPP-adj) and 5,15-bis(4-carboxyphenyl)-10,20-diphenylporphyrin (DiCPP-opp), was investigated at different pH values. Order…
Nanoparticles confined in small volumes exhibit functional properties different from that of the bulk material. Furthermore, the smaller the volume available then the greater the effects of confinement are observed to be. Metallic nanoparticles encapsulated within carbon nanotubes have been proposed for many applicati…
The reaction of molybdate with vanadium(V) in the presence of sulfite anions is explored showing how, via cation control, stepwise assembly through the {Mo(11)V(7)} cluster yields a {M(25)} cluster-based compound, [Mo(VI)(11)V(V)(5)V(IV)(2)O(52)(μ(9)-SO(3))(Mo(VI)(6)V(V)O(22))](10-) (1a), which was first discovered us…
A Solid-State Electrochemical Reaction as the Origin of Magnetism at Oxide Nanoparticle Interfaces, Martin-González, Marisol S., García, Miguel A., Lorite, Israel, Costa-Krämer, José L., Rubio-Marcos, Fernando, Carmona, N., Fernández, José F.
A systematic theoretical study of the structural and magnetic properties of small transition metal oxide clusters TM(n)O(m) (TM = Sc, Ti, V, Cr and Mn; n = 1, 2; m = 1-6) has been carried out by using an ab initio density functional theory approach. The O atoms are partly molecularly adsorbed in O-rich and few-valence…
Several 1,10-phenanthroline derivatives (PhoR), 2,2′-bipyridine derivatives (BpoR) and related europium complexes Eu(TTA)3PhoR and Eu(TTA)3BpoR were synthesized (HTTA = 2-thenoyltrifluoroacetone). Single crystal X-ray diffraction of Eu(TTA)3Php (Php = 2-(pyridyl)-1,10-phenanthroline) shows that Php acts as a tridentat…
We demonstrate a universal approach to assemble gold nanoparticles (AuNPs) into ordered robust nanostructures. Colloidal AuNPs are partially coated by thiol-containing ligands and then destabilised into anisotropic superstructures. In situ polymerization of the surface attached ligands produces enveloped nanoparticle…
Dense ZrB2–SiC and HfB2–SiC composites were fabricated at 1800°C by spark plasma sintering (SPS) using TaSi2 as sintering aid. The volume content of SiC was 5–30% and that of TaSi2 was 5% in the initial compositions. The additive of TaSi2 contributed to the densification of composites by the decomposition and simultan…
A glass with the composition BaO·Al2O2·B2O3 was annealed at 780 °C for 8 h. The samples were investigated by electron backscatter diffraction (EBSD). At the surface of the samples a first layer composed of BaAl2B2O7 crystals oriented with their crystallographic c-axes perpendicular to the surface was formed. This laye…
High quality silica MCM-41 has been synthesized in as little as 5 min using cetyltrimethylammonium bromide (CTMABr) as a template under basic conditions with the aid of ultrasonic irradiation.
A new imide ring-preformed dicarboxylic acid monomer bearing the N,N,N′,N′-tetraphenyl-1,4-phenylenediamine (TPPA) unit, i.e., N,N-bis(4-tert-butylphenyl)-N′,N′-bis(4-carboxyphthalimido)-1,4-phenylenediamine (2), was synthesized from the condensation of N,N-bis(4-aminophenyl)-N′,N′-bis(4-tert-butylphenyl)-1,4-phenylen…