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Self‐Assembling and Size‐Selective Synthesis of Ni and NiO Nanoparticles Embedded in Ordered Mesoporous Carbon and Polymer Frameworks

Wei Wang、Haiyan Wang、Wei Wei 等 5 位作者2011-10-20Chemistry - A European Journal

We demonstrate the self-assembling and size-selective synthesis of uniform and highly dispersed Ni or NiO nanoparticles with diameters below 12 nm embedded in ordered mesoporous carbon or polymer frameworks. Self-assembly is induced by evaporation of the solvent from a mixture of metal-containing liquid crystalline (L…

Supercapacitor Materials and FabricationMesoporous Materials and CatalysisPorphyrin and Phthalocyanine Chemistry

Use of artificial neural networks to determine parameters controlling the nanofibers diameter in electrospinning of nylon‐6,6

Reza Faridi‐Majidi、Hakimeh Ziyadi、Nader Naderi 等 4 位作者2011-10-20Journal of Applied Polymer Science

Abstract This study aimed to find out the primary factors influencing the diameter of electrospun nanofibers of nylon‐6,6 using artificial neural networks (ANNs). Four variables, namely, polymer concentration, working distance, injection rate, and applied voltage were considered as input parameters and the nanofibers…

Advanced Sensor and Energy Harvesting MaterialsConducting polymers and applicationsElectrospun Nanofibers in Biomedical Applications

Whey Protein Film with Oxygen Scavenging Function by Incorporation of Ascorbic Acid

Theeranun Janjarasskul、Kanitha Tananuwong、John M. Krochta2011-10-20Journal of Food Science

UNLABELLED: Residual O(2) in a package headspace can be removed by an O(2)-absorbing sachet, which can be harmful if swallowed by the consumer, or by a chemically-active plastic packaging film, which is difficult to recycle. An edible, O(2)-absorbing film would avoid these disadvantages. The objective of our research…

Postharvest Quality and Shelf Life ManagementNanocomposite Films for Food PackagingAdvanced Cellulose Research Studies

(1 − x ) Ba ( Zr 0.2 Ti 0.8 ) O 3 – x ( Ba 0.7 Ca 0.3 ) TiO 3 Ferroelectric Thin Films Prepared from Chemical Solutions

Guangqing Kang、Kui Yao、John Wang2011-10-20Journal of the American Ceramic Society

Using chemical solution approach on Pt/Ti/SiO 2 /Si substrates (1 − x ) Ba ( Zr 0.2 Ti 0.8 )O 3 – x ( Ba 0.7 Ca 0.3 ) TiO 3 (BZT–BCT) ferroelectric thin films were prepared for the first time. Dense and crack‐free films with perovskite structure were obtained from appropriately produced precursor solution through a mu…

Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsMicrowave Dielectric Ceramics Synthesis

Cellulose nanofibres and cellulose nanowhiskers based natural rubber composites: Diffusion, sorption, and permeation of aromatic organic solvents

P. M. Visakh、Sabu Thomas、Kristiina Oksman 等 4 位作者2011-10-20Journal of Applied Polymer Science

Abstract This article investigates the transport behavior of three aromatic organic solvents, viz. benzene, toluene, and p ‐xylene in natural rubber nanocomposite membranes containing cellulose nanofibres (CNFs) and cellulose nanowhiskers (CNWs) isolated from bamboo pulp. The solvent molecules act as molecular probes…

Natural Fiber Reinforced CompositesAdvanced Cellulose Research StudiesMaterial Properties and Processing

Improvement in Nonlinear Properties and Electrical Stability of ZnO Varistors with B 2 O 3 Additives by Nano‐Coating Method

Lihong Cheng、Guorong Li、Kaiyang Yuan 等 5 位作者2011-10-20Journal of the American Ceramic Society

The nonlinear properties and electrical stability of ZnO varistors were improved with B 2 O 3 additive using nano‐coating method. The microstructural morphology and nonlinear electrical properties with increasing B 2 O 3 contents were studied using SEM and C – V measurements. The influence of B 2 O 3 on grains and gra…

ZnO doping and propertiesGas Sensing Nanomaterials and SensorsCopper-based nanomaterials and applications

Designing Excited States: Theory‐Guided Access to Efficient Photosensitizers for Photodynamic Action

Yusuf Çakmak、Safacan Kölemen、Selin Duman 等 11 位作者2011-10-20Angewandte Chemie

Das rechnergestützte Design tetraradikalischer S1-Zustände wurde experimentell durch Synthese und anschließende Charakterisierung einschließlich Phosphoreszenzmessungen, Gebrauch von Einfangmolekülen und Zellkultur-Untersuchungen bestätigt. Dies führte zu einer Reihe orthogonaler Bodipy-Chromophor-Dimere mit bemerkens…

Porphyrin and Phthalocyanine ChemistryLuminescence and Fluorescent MaterialsPhotochromic and Fluorescence Chemistry

Performance of Effective Core Potentials for Density Functional Calculations on 3d Transition Metals

Xuefei Xu、Donald G. Truhlar2011-10-20Journal of Chemical Theory and Computation

The performance of popular Hartree-Fock-based effective core potentials in Hartree-Fock and density functional calculations of 3d transition metals has been evaluated by basis-set convergence studies for ten cases: the equilibrium bond dissociation energy (De) for dissociation of ground-state Ti2 to ground and excited…

Nuclear Physics and ApplicationsX-ray Diffraction in CrystallographyThermodynamic and Structural Properties of Metals and Alloys

Combining flagelliform and dragline spider silk motifs to produce tunable synthetic biopolymer fibers

Florence Teulé、Bennett Addison、Alyssa R. Cooper 等 9 位作者2011-10-20Biopolymers

The two Flag/MaSp 2 silk proteins produced recombinantly were based on the basic consensus repeat of the dragline silk spidroin 2 protein (MaSp 2) from the Nephila clavipes orb weaving spider. However, the proline-containing pentapeptides juxtaposed to the polyalanine segments resembled those found in the flagelliform…

Neurobiology and Insect Physiology ResearchSilk-based biomaterials and applicationsBiochemical and Structural Characterization

Enhanced Relaxometric Properties of MRI “Positive” Contrast Agents Confined in Three‐Dimensional Cubic Mesoporous Silica Nanoparticles

Rémy Guillet‐Nicolas、Jean‐Luc Bridot、Yongbeom Seo 等 5 位作者2011-10-20Advanced Functional Materials

Abstract Mesoporous silica nanoparticles (MSNs) are of growing interest for the development of novel probes enabling efficient tracking of cells in vivo using magnetic resonance imaging (MRI). The incorporation of Gd 3+ paramagnetic ions into highly porous MSNs is a powerful strategy to synthesize “positive” MRI contr…

Metal-Organic Frameworks: Synthesis and ApplicationsAdvanced MRI Techniques and ApplicationsLanthanide and Transition Metal Complexes

Mechanical Characterization of ZrB 2 –SiC Composites with Varying SiC Particle Sizes

Jeremy Watts、Gregory E. Hilmas、William G. Fahrenholtz2011-10-20Journal of the American Ceramic Society

Flexural strength, elastic modulus, and hardness were used to characterize the mechanical properties of ZrB 2 –SiC composites that contained varying SiC particle sizes. Dense ZrB 2 –SiC composites consisting of 70 vol% ZrB 2 and 30 vol% α‐SiC were produced via hot pressing. This series of composites had maximum SiC pa…

Advanced ceramic materials synthesisBoron and Carbon Nanomaterials ResearchAdvanced materials and composites

Anthracene-Fused BODIPYs as Near-Infrared Dyes with High Photostability

Lintao Zeng、Chongjun Jiao、Xiaobo Huang 等 6 位作者2011-10-20Organic Letters

An anthracene unit was successfully fused to the zigzag edge of a boron dipyrromethene (BODIPY) core by an FeCl(3)-mediated oxidative cyclodehydrogenation reaction. Meanwhile, a dimer was also formed by both intramolecular cyclization and intermolecular coupling. The anthracene-fused BODIPY monomer 7a and dimer 7b sho…

Nanoplatforms for cancer theranosticsPorphyrin and Phthalocyanine ChemistryLuminescence and Fluorescent Materials

Metal-insulator transition in a two-band model for the perovskite nickelates

SungBin Lee、Ru Chen、Leon Balents2011-10-20Physical Review B

Motivated by recent Fermi-surface and transport measurements on LaNiO${}_{3}$, we study the Mott metal-insulator transitions of perovskite nickelates, with the chemical formula $R$NiO${}_{3}$, where $R$is a rare-earth ion. We introduce and study a minimal two-band model, which takes into account only the e${}_{g}$ ban…

Ferroelectric and Piezoelectric MaterialsMagnetic and transport properties of perovskites and related materialsThermal Expansion and Ionic Conductivity

Direct Attachment of Oligonucleotides to Quantum Dot Interfaces

Hyunjoo Han、Joshua Zylstra、Mathew M. Maye2011-10-20Chemistry of Materials

A straightforward functionalization strategy for the direct attachment of single-stranded oligonucleotides (ssDNA) to quantum dot (qdot) interfaces is described. The approach takes advantage of a histidine-mediated phase transfer protocol that results in qdots with high colloidal stability in aqueous buffers. The weak…

Gold and Silver Nanoparticles Synthesis and ApplicationsAdvanced biosensing and bioanalysis techniquesQuantum Dots Synthesis And Properties

Large Dielectric Constant and M axwell– W agner Effects in BaTiO 3 /Cu Composites

Ning Xu、Pu Yong Ping、Zhuo Wang2011-10-20Journal of the American Ceramic Society

Dense ceramic composites with ferroelectric BaTiO 3 and metal Cu were prepared via the solid‐state reaction route at 1280°C in nitrogen atmosphere. The frequency and temperature dependence of impedance, resistance, and dielectric permittivity of BaTiO 3 / x Cu in the range of 10 −1 –10 6 Hz have been investigated, res…

Ferroelectric and Piezoelectric MaterialsDielectric materials and actuatorsDielectric properties of ceramics

Reaction coordinates for the crystal nucleation of colloidal suspensions extracted from the reweighted path ensemble

Wolfgang Lechner、Christoph Dellago、Peter G. Bolhuis2011-10-20The Journal of Chemical Physics

We study the mechanisms of the homogeneous crystal nucleation from the supercooled liquid to the crystal phase in the Gaussian core model for colloidal suspensions with the aim to find optimal reaction coordinates. We introduce a set of novel collective variables based on the local structure of particles. By applying…

Material Dynamics and PropertiesAdvanced Thermodynamics and Statistical Mechanicsnanoparticles nucleation surface interactions

Application of the Temkin Model to the Adsorption of CO on Gold

Christopher J. Pursell、Heather Hartshorn、Timothy B. Ward 等 5 位作者2011-10-20The Journal of Physical Chemistry C

A treatment of the Temkin model was developed for describing the adsorption of CO on gold. In this presentation, it is made clear that the Temkin thermodynamic model is an extension of the Langmuir model that incorporates a linear variation of the adsorption enthalpy. It is also stressed that the Temkin model can be i…

Catalytic Processes in Materials ScienceCatalysis and Oxidation Reactionsnanoparticles nucleation surface interactions

A New Family of Nonanuclear Lanthanide Clusters Displaying Magnetic and Optical Properties

Dimitris I. Alexandropoulos、Shreya Mukherjee、Constantina Papatriantafyllopoulou 等 8 位作者2011-10-20Inorganic Chemistry

The initial employment of 2-(hydroxymethyl)pyridine in 4f metal chemistry has afforded a new family of Ln(III)(9) clusters with a sandglass-like topology and dual physical properties; the Dy(III) member shows single-molecule magnetism behavior, while the Eu(III) analogue exhibits intense red photoluminescence.

Magnetism in coordination complexesLanthanide and Transition Metal ComplexesNanocluster Synthesis and Applications

Rheological behavior of concentrated silica suspension and its application to soft armor

Tae Jin Kang、Chang Youn Kim、Kyung Hwa Hong2011-10-20Journal of Applied Polymer Science

Abstract The objective of this study is to develop an advanced stab and/or ballistic proof material composed of shear thickening fluid (STF) and Kevlar composite fabric. In this study, we prepared STF using sphere silica and fumed silica as silica particles and ethylene glycol and polyethylene glycol (PEG 200) as medi…

Mechanical Behavior of CompositesTextile materials and evaluations

Nuclear Targeted Silver Nanospheres Perturb the Cancer Cell Cycle Differently than Those of Nanogold

Lauren A. Austin、Bin Kang、Chun‐Wan Yen 等 4 位作者2011-10-20Bioconjugate Chemistry

Plasmonic nanoparticle research has become increasingly active due to potential uses in biomedical applications. However, little is known about the intracellular effects these nanoparticles have on mammalian cells. The aim of this work is to investigate whether silver nanoparticles (AgNPs) conjugated with nuclear and…

Nanoparticles: synthesis and applicationsGold and Silver Nanoparticles Synthesis and ApplicationsRNA Interference and Gene Delivery