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Physical and Electrical Properties of Nanosized Mn‐ and Cr‐Doped Strontium Y‐Type Hexagonal Ferrites

Muhammad Javed Iqbal、Faroha Liaqat2009-12-21Journal of the American Ceramic Society

Nanometer‐sized crystallites of Y‐type strontium hexaferrite, Sr 2 Ni 2 Fe 12 O 22 and its Mn‐ and Cr‐doped derivatives have been synthesized by the sol–gel method. Y‐type phase formation was achieved at a considerably lower temperature of 950°C than is required in the traditional solid‐state method (1200°C). The effe…

Multiferroics and related materialsMagnetic Properties and Synthesis of FerritesElectromagnetic wave absorption materials

Preparation of polyoxometalates in ionic liquids by ionothermal synthesis

Shiwei Lin、Wenli Liu、Yangguang Li 等 6 位作者2009-12-21Dalton Transactions

Ionothermal synthesis was applied to the formation of polyoxometalates (POMs) and two new compounds [EMIM](8)Na(9)[WFe(9)(micro(3)-O)(3)(micro(2)-OH)(6)O(4)H(2)O(SiW(9)O(34))(3)].7H(2)O (, [EMIM](8)Na(9)[].7H(2)O, EMIM = 1-ethyl-3-methylimidazolium) and [EMIM](4)[SiMo(12)O(40)].12H(2)O (), have been successfully produ…

Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsVanadium and Halogenation Chemistry

Curie Temperature, Biaxial Elastic Modulus, and Thermal Expansion Coefficient of (K,Na)NbO3Piezoelectric Thin Films

Kenji Shibata、Kazufumi Suenaga、Akira Nomoto 等 4 位作者2009-12-21Japanese Journal of Applied Physics

We investigated fundamental parameters such as the Curie temperature, biaxial elastic modulus, and thermal expansion coefficient of (K,Na)NbO 3 (KNN) films on Pt/Ti/SiO 2 /Si substrates. From the temperature dependence of the dielectric constant of the KNN films, their Curie temperature was approximately 360 °C; this…

Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesGeophysics and Sensor Technology

Epitaxial ZnO Thin Films ona-Plane Sapphire Substrates Grown by Ultrasonic Spray-Assisted Mist Chemical Vapor Deposition

Hiroyuki Nishinaka、Y. Kamada、Naoki Kameyama 等 4 位作者2009-12-21Japanese Journal of Applied Physics

High-quality epitaxial ZnO thin films were grown by an ultrasonic spray-assisted mist chemical vapor deposition (CVD) on a-plane sapphire substrates with ZnO buffer layers. The ZnO thin films were grown with c -axis orientation without notable rotational domains. Surface morphologies and electrical properties were mar…

ZnO doping and propertiesCopper-based nanomaterials and applicationsGa2O3 and related materials

p -type conduction in beryllium-implanted hexagonal boron nitride films

Bin He、Wenjun Zhang、Zhiqiang Yao 等 13 位作者2009-12-21Applied Physics Letters

p -type conduction in hexagonal boron nitride (hBN) films was achieved by beryllium implantation and subsequent rapid thermal annealing treatment. The dependence of phase composition and electrical properties of hBN films on the implantation fluence and annealing was studied. A maximum resistivity reduction by six ord…

Graphene research and applicationsDiamond and Carbon-based Materials ResearchBoron and Carbon Nanomaterials Research

Targeting the efficacy of a dendrimer-based nanotherapeutic in heterogeneous xenograft tumors in vivo

Andrzej Myc、Jolanta F. Kukowska‐Latallo、Peter Cao 等 7 位作者2009-12-21Anti-Cancer Drugs

Our earlier studies have shown the in vitro and in vivo targeting of a generation 5 (G5) dendrimer-based multifunctional conjugate that contained folic acid (FA) as the targeting agent and methotrexate (MTX) as the chemotherapeutic drug. To clinically apply the synthesized G5-FA-MTX nanotherapeutic, it is important th…

RNA Interference and Gene DeliveryDendrimers and Hyperbranched PolymersProtein Degradation and Inhibitors

Pressure Effects on a Spin-Crossover Monomeric Compound [Fe(pmea)(SCN)2] (pmea = bis[(2-pyridyl)methyl]-2-(2-pyridyl)ethylamine)

Bao Li、Rong‐Jia Wei、Jun Tao 等 5 位作者2009-12-21Inorganic Chemistry

Spin-crossover (SCO) compounds are a sort of bistable material whose electronic and magnetic properties can be tuned by external physical stimuli, such as heat, light, and pressure. The title SCO compound [Fe(pmea)(NCS)(2)] (1; pmea = bis[(2-pyridyl)methyl]-2-(2-pyridyl)ethylamine) undergoes spin transition in such a…

Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies

The influence of the antiferromagnetic boundary on the magnetic property of La2NiMnO6

Xianjie Wang、Yu Sui、Yao Li 等 9 位作者2009-12-21Applied Physics Letters

Polycrystalline La2NiMnO6 compounds were fabricated at different temperatures and their magnetic properties were investigated. Although the antiferromagnetic antisite disorder degree changes a little, the antiferromagnetic coupling intensity increases with increasing synthesized temperature. When La2NiMnO6 sample was…

Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics

Patterning of Polymer Electrodes by Nanoscratching

Liqiang Li、Michael Hirtz、Wenchong Wang 等 6 位作者2009-12-21Advanced Materials

The patterning of conducting polymer PEDOT:PSS, an excellent organic electrode material, with high resolution (50 nm, middle part of figure) on both rigid and flexible substrates by AFM nanoscratching (left part of figure) is demonstrated. The high density electrode array (108 elements cm−2) and small area electrode p…

Organic Electronics and PhotovoltaicsConducting polymers and applicationsAnalytical Chemistry and Sensors

Covalent Bonding and the Trans Influence in Lanthanide Compounds

Karsten Krogh‐Jespersen、M.D. Romanelli、J.H. Melman 等 5 位作者2009-12-21Inorganic Chemistry

A pair of mer-octahedral lanthanide chalcogenolate coordination complexes [(THF)(3)Ln(EC(6)F(5))(3) (Ln = Er, E = Se; Ln = Yb, E = S)] have been isolated and structurally characterized. Both compounds show geometry-dependent bond lengths, with the Ln-E bonds trans to the neutral donor tetrahydrofuran (THF) significant…

Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesInorganic Fluorides and Related Compounds

Elastic relaxations associated with the Pm\bar {3}m –R\bar {3}c transition in LaAlO3: III. Superattenuation of acoustic resonances

Michael A. Carpenter、A. Buckley、Paul A. Taylor 等 4 位作者2009-12-21Journal of Physics Condensed Matter

Resonant ultrasound spectroscopy has been used to characterize elastic softening and anelastic dissipation processes associated with the Pm3m <--> R3c transition in single crystal and ceramic samples of LaAlO(3). Softening of the cubic structure ahead of the transition point is not accompanied by an increase in dissip…

Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesSolid-state spectroscopy and crystallography

Expanding the Family of Collagen Proteins: Recombinant Bacterial Collagens of Varying Composition Form Triple-Helices of Similar Stability

Chunying Xu、Zhuoxin Yu、Masayori Inouye 等 5 位作者2009-12-21Biomacromolecules

The presence of the (Gly-Xaa-Yaa)(n) open reading frames in different bacteria predicts the existence of an expanded family of collagen-like proteins. To further explore the triple-helix motif and stabilization mechanisms in the absence of hydroxyproline (Hyp), predicted novel collagen-like proteins from Gram-positive…

Enzyme Production and CharacterizationCollagen: Extraction and CharacterizationBone and Dental Protein Studies

Synthesis, structure and optical properties of zinc oxide hexagonal microprisms

Latha Kumari、W. Z. Li2009-12-21Crystal Research and Technology

Abstract Zinc oxide (ZnO) pencil‐head‐like (PHL) microprisms were synthesized by a hydrothermal route using a zinc (Zn) plate as a source and substrate. The structural analysis confirmed the formation of ZnO with hexagonal wurtzite phase on the hexagonal Zn substrate and the growth of the ZnO microparticles along the…

ZnO doping and propertiesGas Sensing Nanomaterials and SensorsGa2O3 and related materials

Multilayer nanoparticles with a magnetite core and a polycation inner shell as pH-responsive carriers for drug delivery

Miao Guo、Yan Yu、Xiaozhou Liu 等 7 位作者2009-12-21Nanoscale

Nanocarriers with multilayer core-shell architecture were prepared by coating a superparamagnetic Fe(3)O(4) core with a triblock copolymer. The first block of the copolymer formed the biocompatible outermost shell of the nanocarrier. The second block that contains amino groups and hydrophobic moiety formed the inner s…

Nanoparticle-Based Drug DeliveryCharacterization and Applications of Magnetic NanoparticlesGraphene and Nanomaterials Applications

Single step reductive polymerization of functional 3,4-propylenedioxythiophenes via direct C–H arylation catalyzed by palladium acetate

Anshu Kumar、Anshu Kumar、Anil Kumar 等 4 位作者2009-12-21Polymer Chemistry

In this Communication we report a single step reductive polymerization of ProDOT derivatives which is compatible with functional side chains and is amenable for scale-up.

Catalytic Cross-Coupling ReactionsConducting polymers and applicationsPolyoxometalates: Synthesis and Applications

Hybrid p-n junction light-emitting diodes based on sputtered ZnO and organic semiconductors

Jong H. Na、M. Kitamura、Munetaka Arita 等 4 位作者2009-12-21Applied Physics Letters

We fabricated light-emitting hybrid p-n junction devices using low temperature deposited ZnO and organic films, in which the ZnO and the organic films served as the n- and p-type component, respectively. The devices have a rectification factor as high as ∼103 and a current density greater than 2 A/cm2. Electroluminesc…

ZnO doping and propertiesPerovskite Materials and ApplicationsOrganic Light-Emitting Diodes Research

Stable Silver(I) Hydride Complexes Supported by Diselenophosphate Ligands

C. W. Liu、Hao‐Wei Chang、Bijay Sarkar 等 6 位作者2009-12-21Inorganic Chemistry

The first stable structure of silver(I) cluster cations [Ag(8)(mu(4)-H){Se(2)P(OR)(2)}(6)](+) [R = (i)Pr, 1; Et, 2] containing Ag(I)-hydride bridges (Ag-mu-H-Ag) in T symmetry was reported. The clusters having an interstitial hydride were composed of an octanuclear silver core in tetracapped tetrahedral geometry, whic…

Organometallic Complex Synthesis and CatalysisNanocluster Synthesis and ApplicationsInorganic Chemistry and Materials

Impact of Drying on Wood Ultrastructure Observed by Deuterium Exchange and Photoacoustic FT-IR Spectroscopy

Miro Suchy、Jenni Virtanen、Eero Kontturi 等 4 位作者2009-12-21Biomacromolecules

The impact of drying on the ultrastructure of fresh wood was studied by deuterium exchange coupled with FT-IR analysis. This fundamental investigation demonstrated that water removal leads to irreversible alterations of the wood structure, namely, supramolecular rearrangements between wood polymers. The deuteration of…

Advanced Cellulose Research StudiesLignin and Wood ChemistryCultural Heritage Materials Analysis

Spectroscopic properties of Er 3+ -doped lead phosphate glasses for photonic application

Clenilton Costa dos Santos、I. Guedes、C.-K. Loong 等 8 位作者2009-12-21Journal of Physics D Applied Physics

The spectroscopic characteristics of Er3+-doped lead phosphate glasses have been investigated, and Judd?Ofelt analysis was used to evaluate the effect of increasing the Er3+ content on the glass matrices. The intensity-dependent Judd?Ofelt parameters, ?(4) and ?(6), remained constant while ?(2) decreased. The concentr…

Luminescence Properties of Advanced MaterialsGlass properties and applicationsSolid State Laser Technologies

Biodistribution and long-term fate of silver nanoparticles functionalized with bovine serum albumin in rats

Lourdes Garza‐Ocañas、D. Ferrer、Justin L. Burt 等 9 位作者2009-12-21Metallomics

Silver nanocrystals (Ag NCs) hold promising antibiotic and antiviral properties in biological systems. The biodistribution of silvernanostructures injected into animals in vivo is currently unknown, remaining as a fundamental issue for potential therapeutic applications. Here, we injected Ag NCs capped with bovine ser…

Nanoparticles: synthesis and applicationsTrace Elements in HealthMoringa oleifera research and applications