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Strong Acid–Nonionic Surfactant Lyotropic Liquid-Crystalline Mesophases as Media for the Synthesis of Carbon Quantum Dots and Highly Proton Conducting Mesostructured Silica Thin Films and Monoliths

Elif Berna Olutaş、Fadime Mert Balcı、Ömer Dag2015-09-02Langmuir

Lyotropic liquid-crystalline (LLC) materials are important in designing porous materials, and acids are as important in chemical synthesis. Combining these two important concepts will be highly beneficial to chemistry and material science. In this work, we show that a strong acid can be used as a solvent for the assem…

Liquid Crystal Research AdvancementsCarbon and Quantum Dots ApplicationsAerogels and thermal insulation

Stabilization of PbS quantum dots by high molecular polyvinylpyrrolidone

S. K. Evstropiev、I. M. Kislyakov、И. В. Багров 等 4 位作者2015-09-02Polymers for Advanced Technologies

The article describes the results of the investigations of optical and luminescent properties of PbS suspensions and composite coatings stabilized by high-molecular polyvinylpyrrolidone. Experiments show strong dependence of optical properties and stability of the materials on the concentration ratio between PbS nanop…

Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsCopper-based nanomaterials and applications

Reconfigurable multi-scale colloidal assembly on excluded volume patterns

Tara D. Edwards、Yuguang Yang、W. Neil Everett 等 4 位作者2015-09-02Scientific Reports

The ability to create multi-scale, periodic colloidal assemblies with unique properties is important to emerging applications. Dynamically manipulating colloidal structures via tunable kT-scale attraction can provide the opportunity to create particle-based nano- and microstructured materials that are reconfigurable.…

Material Dynamics and PropertiesSurfactants and Colloidal SystemsPickering emulsions and particle stabilization

Roughness reduction of large-area high-quality thick Al films for echelle gratings by multi-step deposition method

Zizheng Li、Jinsong Gao、Haigui Yang 等 5 位作者2015-09-02Optics Express

Generally, echelle grating ruling is performed on a thick Al film. Consequently, high-quality large-area thick Al films preparation becomes one of the most important factors to realize a high-performance large-size echelle grating. In this paper, we propose a novel multi-step deposition process to improve thick Al fil…

Photonic Crystals and ApplicationsOptical Coatings and GratingsSurface Roughness and Optical Measurements

Synthesis and Properties of Cellulose-Functionalized POSS-SiO2/TiO2 Hybrid Composites

Gwang-Wook Hong、Sivalingam Ramesh、Joo‐Hyung Kim 等 5 位作者2015-09-02Journal of Nanoscience and Nanotechnology

The mechanical, thermal, optical, electrical and morphological properties of cellulose, an excellent natural biomaterial, can be improved by organic-inorganic hybrid composite methods. Based on the pristine properties of cellulose, the preparation of cellulose-metal oxide hybrid nanocomposites using a dispersion proce…

biodegradable polymer synthesis and propertiesSilicone and Siloxane ChemistryAntimicrobial agents and applications

Structural characteristics and bonding environment of Ag nanoparticles synthesized by gamma irradiation within thermo‐responsive poly( N ‐isopropylacrylamide) hydrogel

Jelena Spasojević、Аleksandra Radosavljević、Jelena Krstić 等 8 位作者2015-09-02Polymer Composites

To produce well‐defined metal clusters stabilized in protective matrix, poly( N ‐isopropylacrylamide) (PNiPAAm) hydrogel with different initial concentration of polymer was used as nanoreactor. The in situ synthesis of well dispersed silver nanoparticles (AgNPs) was performed by gamma irradiation. The obtained AgNPs a…

Polymer Nanocomposites and PropertiesElectrospun Nanofibers in Biomedical ApplicationsPolymer Nanocomposite Synthesis and Irradiation

Basal Plane Fluorination of Graphene by XeF2via a Radical Cation Mechanism

Yijun Liu、Benjamin W. Noffke、Xiaoxiao Qiao 等 7 位作者2015-09-02The Journal of Physical Chemistry Letters

Graphene fluorination with XeF2 is an attractive method to introduce a nonzero bandgap to graphene under mild conditions for potential electro-optical applications. Herein, we use well-defined graphene nanostructures as a model system to study the reaction mechanism of graphene fluorination by XeF2. Our combined exper…

Graphene research and applicationsFiber-reinforced polymer compositesInorganic Fluorides and Related Compounds

PEO of rheocast A356 Al alloy: energy efficiency and corrosion properties

M. Mohedano、E. Matykina、R. Arrabal 等 5 位作者2015-09-02Surface and Interface Analysis

PEO coatings were developed under voltage‐controlled mode on a rheocast A356 aluminum alloy without and with pretreatment by conventional anodizing in sulphuric acid. Microstructure and composition of uncoated and coated materials were studied using SEM, EDS and XRD. The anodic precursor oxide layer preserves the micr…

Corrosion Behavior and InhibitionAluminum Alloy Microstructure PropertiesAnodic Oxide Films and Nanostructures

Behavior of sodium borosilicate glasses under compression using molecular dynamics

Dimitrios Kilymis、Jean‐Marc Delaye、Simona Ispas2015-09-02The Journal of Chemical Physics

We have performed classical molecular dynamics simulations in order to study the changes under compression in the local and medium range structural properties of three sodium borosilicate glasses with varying sodium content. These glasses have been isostatically compressed up to 20 GPa and then decompressed in order t…

High-pressure geophysics and materialsMaterial Dynamics and PropertiesGlass properties and applications

Organic Nano-Montmorillonite for Simultaneously Improving the Flame Retardancy, Thermal Stability, and Mechanical Properties of Intumescent Flame-Retardant Silicone Rubber Composites

Xingjian Li、Zijiang Yang、Jian-Gao Yao 等 4 位作者2015-09-02Journal of Macromolecular Science Part B

The flammability of room temperature vulcanized silicone rubber (RTVSR) composites filled with melamine phosphate (MP) as intumescent flame-retardant additives was characterized by limiting oxygen index (LOI), UL-94 test, and cone calorimeter. In addition, the thermal degradation of the composites was studied using th…

Polymer Nanocomposites and PropertiesFlame retardant materials and propertiesSilicone and Siloxane Chemistry

Synthesis and Luminescent Properties of Gd2MoO6:Eu3+

Sook Hyun Kwon、Byung Kee Moon、Jung Hyun Jeong 等 5 位作者2015-09-02Journal of Nanoscience and Nanotechnology

A series of 6 mol% Eu(3+) doped Gd2MoO6 samples were prepared by using the sol-gel method. The X-ray diffraction patterns of the samples confirmed their monoclinic structure after they were annealed at 1300 °C, and a scanning electron microscope image revealed closely packed particles. The excitation spectra showed th…

Luminescence Properties of Advanced MaterialsGas Sensing Nanomaterials and SensorsCatalysis and Oxidation Reactions

Microstructural Evolution and Its Effect on Mechanical Properties of Isotactic Polypropylene by Shear Plastic Deformation at Elevated Temperatures

Ting Lan Wang、Song Chao Tang、Jian Ding Chen2015-09-02Journal of Macromolecular Science Part B

Isotactic polypropylene (iPP) was plastically shear deformed by equal channel angular extrusion (ECAE) at extrusion temperatures varied from 45 to 125°C (25 mm/min). The evolutions of morphology and crystal orientation were studied by reflected optical microscopy (ROM), scanning electron microscopy (SEM), and X-ray di…

Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties

Optical Properties of Laser Lines and Fluorescent Spectrum in Cholesteric Liquid Crystal Laser

Mi‐Yun Jeong、Ki Soo Chung、J. W. Wu2015-09-02Journal of Nanoscience and Nanotechnology

We experimentally studied the comprehensive optical properties of the laser lines and fluorescent spectrum generated by a continuous tunable cholesteric liquid crystal (CLC) laser array. We found that the laser lines generated from a CLC with a right-handed circular helix were right-handed circular polarized and laser…

Photonic and Optical DevicesLiquid Crystal Research AdvancementsSemiconductor Lasers and Optical Devices

Vibration Control of Strain Gradient Nonlinear Micro-Cantilevers Using Piezoelectric Actuators

Ramin Vatankhah、Mohammad Ali Nojoumian、Hassan Salarieh2015-09-02Applied Mechanics and Materials

A closed-loop control algorithm is used for stabilization of a vibrating nonlinearstrain gradient micro Euler-Bernoulli cantilever beam usinglinear piezoelectric actuation.In this paper, the governing partial differential equation (PDE) of the nonlinear strain gradient beam with piezoelectric actuator is obtained. Gal…

Mechanical and Optical ResonatorsThermoelastic and Magnetoelastic PhenomenaNonlocal and gradient elasticity in micro/nano structures

Extraction and characterization of Retama monosperma fibers

Djamel Eddine Aïzi、HARCHE Meriem KAID2015-09-02AFRICAN JOURNAL OF BIOTECHNOLOGY

The aims of this study were to determine the good conditions for fibers extraction from Retama monosperma young stems and their mechanical, physical and chemical characteristics. The fibers were extracted using a range of NaOH concentration from 1 to 16% in a period of treatment of 1 to 24 h, coupled with a physical t…

Natural Fiber Reinforced CompositesAdvanced Cellulose Research StudiesBamboo properties and applications

Synthesis of Imine-Bearing ZnO Nanoparticle Thin Films and Characterization of Their Structural, Morphological and Optical Properties

Narinder Kaur、Sanjeev Sharma、Deuk Young Kim 等 5 位作者2015-09-02Journal of Nanoscience and Nanotechnology

We are presenting the first report on the fabrication of imine-bearing ZnO nanoparticle thin films grown on Corning glass by spin coating. The sol was prepared by dissolving imine-bearing ZnO nanoparticles in dimethylsulfoxide (DMSO). The thickness of the films was manipulated to be 125-200 nm. The X-ray diffraction (…

ZnO doping and properties

Simulation of Absorption Spectra of Metal Nanoparticles Embedded in Organic Media

Thananchai Dasri、Supachai Sompech2015-09-02Integrated ferroelectrics

Metal nanoparticles, silver and gold, of different sizes and shapes are actively being researched in a variety of different fields such as solar cells. The unique plasmonic properties of these particles, especially in the visible and NIR-region ranging from 400-1200 nm, are the basis for most of these applications. Th…

Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchNonlinear Optical Materials Studies

Quasi-Three-Coordinate Iron and Cobalt Terphenoxide Complexes {AriPr8OM(μ-O)}2 (AriPr8 = C6H-2,6-(C6H2-2,4,6-iPr3)2-3,5-iPr2; M = Fe or Co) with M(III)2(μ-O)2 Core Structures and the Peroxide Dimer of 2-Oxepinoxy Relevant to Benzene Oxidation

Pei Zhao、Hao Lei、Chengbao Ni 等 10 位作者2015-09-02Inorganic Chemistry

The bis(μ-oxo) dimeric complexes {Ar(iPr8)OM(μ-O)}2 (Ar(iPr8) = C6H-2,6-(C6H2-2,4,6-(i)Pr3)2-3,5-(i)Pr2; M = Fe (1), Co (2)) were prepared by oxidation of the M(I) half-sandwich complexes {Ar(iPr8)M(η(6)-arene)} (arene = benzene or toluene). Iron species 1 was prepared by reacting {Ar(iPr8)Fe(η(6)-benzene)} with N2O o…

Magnetism in coordination complexesLanthanide and Transition Metal ComplexesMetal-Catalyzed Oxygenation Mechanisms

Dielectric Properties of Pure and Gd‐Doped HfO 2 Ceramics

Chunchang Wang、Da Zhang、Hong Wang 等 6 位作者2015-09-02Journal of the American Ceramic Society

The pure, 2 at.%, and 20 at.% Gd‐doped HfO 2 ceramics were prepared by the standard solid‐state reaction technique. Dielectric properties of these ceramics were investigated in the temperature range 300–1050 K and frequency range 20–5 × 10 6 Hz. Our results revealed an intrinsic dielectric constant around 20 in the te…

Ferroelectric and Piezoelectric MaterialsFerroelectric and Negative Capacitance DevicesDielectric properties of ceramics

Interband transitions in epitaxial ferroelectric films of NaNbO3

M. Tyunina、D. Chvostová、Lide Yao 等 7 位作者2015-09-02Physical Review B

The interband optical transitions in cube-on-cube-type epitaxial ferroelectric $\mathrm{NaNb}{\mathrm{O}}_{3}$ thin films and a reference antiferroelectric $\mathrm{NaNb}{\mathrm{O}}_{3}$ crystal are studied in the spectral range of 0.74--9 eV using variable-angle spectroscopic ellipsometry. The energies and the types…

Ferroelectric and Piezoelectric MaterialsPhotorefractive and Nonlinear OpticsAcoustic Wave Resonator Technologies