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A Sub‐50‐nm Monosized Superparamagnetic Fe3O4@SiO2T2‐Weighted MRI Contrast Agent: Highly Reproducible Synthesis of Uniform Single‐Loaded Core–Shell Nanostructures

Feng Chen、Wenbo Bu、Yu Chen 等 11 位作者2009-11-24Chemistry - An Asian Journal

Oleic acid stabilized superparamagnetic iron oxide nanoparticles (SPION) were selected as the cores for fabrication of sub-50-nm monodisperse single-loaded SPION@SiO2 core-shell nanostructures. Parameters that influence the formation of SPION@SiO2 in the water-in-oil reverse microemulsion system have been systematical…

Nanoparticle-Based Drug DeliveryIron oxide chemistry and applicationsCharacterization and Applications of Magnetic Nanoparticles

Reversibly Stabilized Multifunctional Dextran Nanoparticles Efficiently Deliver Doxorubicin into the Nuclei of Cancer Cells

Yuling Li、Li Zhu、Zhaozhong Liu 等 8 位作者2009-11-24Angewandte Chemie

Eindringlinge: Der effiziente Transport von Antikrebswirkstoffen in Zellen gelingt mithilfe reversibel vernetzender Dextrannanopartikel, die unter reduktiven Bedingungen – wie sie im Zellinneren vorherrschen – schnell destabilisiert werden. Die Nanopartikel nehmen große Wirkstoffmengen auf, und sie können Doxorubicin…

Nanoparticle-Based Drug DeliveryAdvanced biosensing and bioanalysis techniquesGraphene and Nanomaterials Applications

Synthesis, micelle formation, and bulk properties of poly(ethylene glycol)‐b‐poly(pentafluorostyrene)‐g‐polyhedral oligomeric silsesquioxane amphiphilic hybrid copolymers

Hazrat Hussain、Beng Hoon Tan、Khine Yi Mya 等 6 位作者2009-11-24Journal of Polymer Science Part A Polymer Chemistry

Abstract The synthesis, micelle formation, and bulk properties of semifluorinated amphiphilic poly(ethylene glycol)‐ b ‐poly(pentafluorostyrene)‐ g ‐cubic polyhedral oligomeric silsesquioxane (PEG‐ b ‐PPFS‐ g ‐POSS) hybrid copolymers is reported. The synthesis of amphiphilic PEG‐ b ‐PPFS block copolymers are achieved…

Advanced Polymer Synthesis and CharacterizationSynthesis and properties of polymersSilicone and Siloxane Chemistry

Polarization-dependent GaN surface grating reflector for short wavelength applications

Joonhee Lee、Sungmo Ahn、Hojun Chang 等 6 位作者2009-11-24Optics Express

This study proposes a one-dimensional sub-wavelength grating structure on GaN surface which behaves as a reflector for transverse-electric polarized light in the blue wavelength range. The rigorous coupled-wave analysis method was used to analyze the effects of various structural parameters on the reflectance spectra…

Photonic and Optical DevicesPhotonic Crystals and ApplicationsOptical Coatings and Gratings

Reactivity Trends in the Oxidation of CO by Anionic Transition Metal Oxide Clusters

J. Ulises Reveles、Grant E. Johnson、Shiv N. Khanna 等 4 位作者2009-11-24The Journal of Physical Chemistry C

Evidence obtained by experiments in the gas phase and density functional theory calculations indicates that differences in the CO binding energy to the transition metal site and the overall change in energy and spin multiplicity from reactants to products, underlie the variation in relative reactivity observed for the…

Advanced Chemical Physics StudiesCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions

Aminoclay: A Designer Filler for the Synthesis of Highly Ductile Polymer-Nanocomposite Film

G. Johnsy、K. K. R. Datta、Vallayil Appukuttan Sajeevkumar 等 6 位作者2009-11-24ACS Applied Materials & Interfaces

Water-dispersible aminoclay synthesized in a single step process was used as an inorganic filler for preparing polyvinyl alcohol (PVA)-clay hybrid films. The PVA-clay hybrid films with different weight percentages of aminoclay were obtained by simple mixing and casting of aqueous solutions of clay and polymer. The com…

Polymer Nanocomposites and PropertiesPolymer composites and self-healingSilicone and Siloxane Chemistry

High-pressure phase transitions ofScPO4andYPO4

Fuxiang Zhang、Jianfei Wang、Maik Lang 等 6 位作者2009-11-24Physical Review B

${\text{ScPO}}_{4}$ and ${\text{YPO}}_{4}$ with the tetragonal zircon-structure were studied at room temperature and pressures up to $\ensuremath{\sim}50\text{ }\text{GPa}$. Pressure-induced phase transitions to the sheelite structure occur at 30 GPa for ${\text{ScPO}}_{4}$ and 16.3 GPa for ${\text{YPO}}_{4}$, respect…

Luminescence Properties of Advanced MaterialsHigh-pressure geophysics and materialsCrystal Structures and Properties

Random terahertz metamaterials

Ranjan Singh、Xinchao Lu、Jianqiang Gu 等 5 位作者2009-11-24Journal of Optics

Using terahertz time-domain spectroscopy, we investigate the normal incidence transmission through periodically and randomly arranged planar split ring resonators (SRRs). The introduction of positional disorder in metamaterials has no effect on the quality factor of the fundamental inductive–capacitive ( LC ) resonanc…

Metamaterials and Metasurfaces ApplicationsPlasmonic and Surface Plasmon ResearchPhotonic Crystals and Applications

Is there really a diagnostically useful relationship between the carbon–oxygen stretching frequencies in metal carboxylate complexes and their coordination mode?

David Martínez、Majid Motevalli、Michael Watkinson2009-11-24Dalton Transactions

An investigation into the relationship between the asymmetric and symmetric stretching modes of ancillary carboxylate ligands and their mode of binding in a family of manganese(III) complexes of tetradentate N(2)O(2) Schiff base ligands, which includes comparison of an (18)O isotopically labelled derivative, has been…

Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies

Vertically cross-linking silver nanoplate arrays with controllable density based on seed-assisted electrochemical growth and their structurally enhanced SERS activity

Guangqiang Liu、Weiping Cai、Lingce Kong 等 5 位作者2009-11-24Journal of Materials Chemistry

A facile seed-assisted electrochemical deposition (ECD) route has been presented to fabricate silver nanoplate arrays at room temperature. The nanoplates are hundreds of nanometres to several micrometres in dimension and tens of nanometres in thickness. All the nanoplates are standing vertically on the indium-tin oxid…

Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesElectrochemical Analysis and Applications

Making “smart polymers” smarter: Modern concepts to regulate functions in polymer science

Hans G. Börner、Hans Kühnle、Jens Hentschel2009-11-24Journal of Polymer Science Part A Polymer Chemistry

Abstract This highlight summarizes recent attempts and advances of macromolecular sciences to abstract the biological concept of regulation and import it into synthetic polymer systems. The differences of “responsive switching” exploited in smart polymers and “regulation” present in the biological world of proteins ar…

Advanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and propertiesPolymer Surface Interaction Studies

Two-Dimensional Networks of Lanthanide Cubane-Shaped Dumbbells

Didier Savard、Po‐Heng Lin、T.J. Burchell 等 7 位作者2009-11-24Inorganic Chemistry

The syntheses, structures, and magnetic properties are reported for three new lanthanide complexes, [Ln(III)(4)(mu(3)-OH)(2)(mu(3)-O)(2)(cpt)(6)(MeOH)(6)(H(2)O)](2) (Ln = Dy (1.15MeOH), Ho (2.14MeOH), and Tb (3.18MeOH)), based on 4-(4-carboxyphenyl)-1,2,4-triazole ligand (Hcpt). The three complexes were confirmed to b…

Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesLanthanide and Transition Metal Complexes

Design of diffractive lenses for focusing surface plasmons

Evgeni A. Bezus、Leonid L. Doskolovich、Nikolay L. Kazanskiy 等 5 位作者2009-11-24Journal of Optics

We present a method of designing diffractive optical elements for transforming and focusing surface plasmons. The method is based on a phase modulation of the surface plasmon provided by the dielectric block with varying geometric parameters located on the interface. The problem of SP diffraction by a dielectric block…

Photonic and Optical DevicesPhotonic Crystals and ApplicationsOptical Coatings and Gratings

Hydrogen Storage Properties of N-Doped Microporous Carbon

Lifeng Wang、Ralph T. Yang2009-11-24The Journal of Physical Chemistry C

A N-doped microporous carbon was synthesized by using NaY as a hard template and acetonitrile as the carbon and nitrogen precursor. The hydrogen storage measurements indicated that the N-doped microporous carbon had an 18% higher storage capacity than the pure carbon with a similar surface area. Furthermore, hydrogen…

Supercapacitor Materials and FabricationAdvanced Battery Materials and TechnologiesHydrogen Storage and Materials

Microwave‐assisted derivatization of cellulose in an ionic liquid: An efficient, expedient synthesis of simple and mixed carboxylic esters

Shirley Possidonio、Ludmila C. Fidale、Omar A. El Seoud2009-11-24Journal of Polymer Science Part A Polymer Chemistry

Abstract Microwave (MW)‐assisted cellulose dissolution in ionic liquids (ILs) has routinely led either to incomplete biopolymer solubilization, or its degradation. We show that these problems can be avoided by use of low‐energy MW heating, coupled with efficient stirring. Dissolution of microcrystalline cellulose in t…

Advanced Cellulose Research StudiesCatalysis for Biomass ConversionLignin and Wood Chemistry

Effects of Freezing/Thawing Cycles and Cellulose Nanowhiskers on Structure and Properties of Biocompatible Starch/PVA Sponges

Yixiang Wang、Chunyu Chang、Lina Zhang2009-11-24Macromolecular Materials and Engineering

Abstract Strong honeycomb like nanocomposite sponges were fabricated from starch and PVA by using repeated cycles of freezing and thawing and reinforcing with cellulose whiskers. Their structure and properties were investigated with WAXD, FT‐IR, SEM, DMTA, rheological measurements, and LSCM. The results revealed that…

Advanced Cellulose Research Studiesbiodegradable polymer synthesis and propertiesElectrospun Nanofibers in Biomedical Applications

Switchable Wettability of Thermo‐Responsive Biocompatible Nanofibrous Films Created by Electrospinning

Shuying Gu、Zhimei Wang、Jianbo Li 等 4 位作者2009-11-24Macromolecular Materials and Engineering

Abstract Thermo‐responsive PNIPAAm/PLLA nanofibrous films with tunable surface morphologies and better biocompatibility were prepared by electrospinning technique. The electrospun composite films possessed a “bead‐on‐string” structure. The wettability of nanofibrous films was observed by water CA measurements. The res…

Surface Modification and SuperhydrophobicityElectrospun Nanofibers in Biomedical ApplicationsPolymer Surface Interaction Studies

An improved method for single fiber tensile test of natural fibers

Wei Hu、Minh‐Tan Ton‐That、Florence Perrin‐Sarazin 等 4 位作者2009-11-24Polymer Engineering and Science

Abstract An improved Single Fiber Tensile Test (SFTT) for the natural fibers was depicted. Natural fibers have irregular shape, and are not uniform along the fiber length and also from one fiber to another. Applying the conventional method, which determine the fiber cross‐section by measuring the fiber diameter using…

Natural Fiber Reinforced CompositesAdvanced Cellulose Research StudiesAdditive Manufacturing and 3D Printing Technologies

Highly Stable Au Nanoparticles with Tunable Spacing and Their Potential Application in Surface Plasmon Resonance Biosensors

Shuyan Gao、Naoto Koshizaki、Hideo Tokuhisa 等 9 位作者2009-11-24Advanced Functional Materials

Abstract Colloidal Au‐amplified surface plasmon resonance (SPR), like traditional SPR, is typically used to detect binding events on a thin noble metal film. The two major concerns in developing colloidal Au‐amplified SPR lie in 1) the instability, manifested as a change in morphology following immersion in organic so…

Gold and Silver Nanoparticles Synthesis and ApplicationsAdvanced biosensing and bioanalysis techniquesPlasmonic and Surface Plasmon Research

Photoresponsive oil sorbers

Erandimala U. Kulawardana、Douglas C. Neckers2009-11-24Journal of Polymer Science Part A Polymer Chemistry

Abstract A photoresponsive oil sorber (POS) with a hydrophobic, photoresponsive core and shell has been synthesized via suspension polymerization. Lauryl acrylate, isodecyl acrylate, and tert ‐butylstyrene were used as monomers, 4‐(methacrylamino)azobenzene (Azo‐M) used as photoresponsive monomer, and bis(methacryloyl…

Surface Modification and SuperhydrophobicityAdvanced Sensor and Energy Harvesting MaterialsElectrohydrodynamics and Fluid Dynamics