Cheng Chen、Yin Cheng、Chung Him Yu 等 6 位作者2008-01-07Journal of Biomedical Materials Research Part A
Nanoparticles based on amorphous poly(3-hydroxybutyrate)-poly(ethylene glycol)-poly(3-hydroxybutyrate) (PHB-PEG-PHB) are potential drug delivery vehicles, and so their cytotoxicity and hemolysis assay were investigated in vitro using two kinds of animal cells. The PHB-PEG-PHB nanoparticles showed excellent biocompatib…
Graphene and Nanomaterials ApplicationsElectrospun Nanofibers in Biomedical Applicationsbiodegradable polymer synthesis and properties
Miguel Navarro‐Cía、Miguel Beruete、M. Sorolla 等 4 位作者2008-01-07Optics Express
Metamaterial structures are artificial materials that show unconventional electromagnetic properties such as negative refraction index, perfect lenses, and invisibility. However, losses are one of the big challenges to be surpassed in order to design practical devices at optical wavelengths. Here we report negative re…
Plasmonic and Surface Plasmon ResearchMetamaterials and Metasurfaces ApplicationsOptical Coatings and Gratings
H. Aglan、M. Calhoun、Lazbourne Allie2008-01-07Journal of Applied Polymer Science
Abstract In this study, the effects of environmental aging on the mechanical performance of elastomeric polyurethane (PU) were investigated using two accelerated aging techniques, namely, ultraviolet (UV) and hygrothermal (HT). Samples were prepared and subjected to UV and HT exposure for a period of 5 months and remo…
Natural Fiber Reinforced CompositesPolymer Nanocomposites and PropertiesPolymer composites and self-healing
Abul K. Azad、Antoinette J. Taylor、E. I. Smirnova 等 4 位作者2008-01-07Applied Physics Letters
We present the experimental characterization of planar terahertz metamaterials based on rectangular electric split-ring resonator designs. Comparisons to square-ring designs reveal that rectangular shapes greatly affect the overall metamaterial response by altering the spectral separation and coupling between multiple…
Terahertz technology and applicationsMetamaterials and Metasurfaces ApplicationsAntenna Design and Analysis
J.L. Sánchez Llamazares、T. Sánchez、Joana Santos 等 9 位作者2008-01-07Applied Physics Letters
Heusler alloy Mn50Ni40In10 was produced as preferentially textured ribbon flakes by melt spinning, finding the existence of martensitic-austenic transformation with both phases exhibiting ferromagnetic ordering. A microcrystalline three-layered microstructure of ordered columnar grains grown perpendicularly to ribbon…
Heusler alloys: electronic and magnetic propertiesShape Memory Alloy TransformationsCreativity in Education and Neuroscience
Alejandro Perez‐Velasco、Virginie Gorteau、Stefan Matile2008-01-07Angewandte Chemie International Edition
Slide rules: A new class of membrane-active rigid-rod molecules comprising π-acidic, n-semiconducting oligoperylenediimides is introduced (see picture). They are able to combine passive anion transport across lipid bilayers with photoactive electron transport in the other direction across intact vesicle membranes. Thu…
Metal-Organic Frameworks: Synthesis and ApplicationsSupramolecular Self-Assembly in MaterialsLuminescence and Fluorescent Materials
M L Gulrajani、Deepti Gupta、S. Periyasamy 等 4 位作者2008-01-07Journal of Applied Polymer Science
Abstract Silver nanoparticles were produced by a chemical reduction method that reduced silver nitrate with reducing agents such as hydrazine and glucose. The silver nanoparticles were characterized with transmission electron microscope, scanning electron microscope, and optical microscope. The effects of process para…
Silk-based biomaterials and applicationsGold and Silver Nanoparticles Synthesis and ApplicationsDyeing and Modifying Textile Fibers
Alon Bahabad、RON LIFSHITZ、Noa Voloch 等 4 位作者2008-01-07arXiv
Two well-known methods for the design of quasicrystal models are used to create novel nonlinear optical devices. These devices are useful for efficient three-wave mixing of several different processes, and therefore offer greater flexibility with respect to the more common periodic nonlinear photonic crystals. We demo…
Materials Science
Sandra Ninet、Frédéric Datchi2008-01-07arXiv
The high pressure(P)-high temperature(T) phase diagram of solid ammonia has been investigated using diamond anvil cell and resistive heating techniques. The III-IV transition line has been determined up to 20 GPa and 500 K both on compression and decompression paths. No discontinuity is observed at the expected locati…
Materials Science
Lluís Mañosa、Xavier Moya、Antoni Planes 等 10 位作者2008-01-07Applied Physics Letters
We report magnetization and differential thermal analysis measurements as a function of pressure across the martensitic transition in magnetically superelastic Ni–Mn–In alloys. It is found that the properties of the martensitic transformation are significantly affected by the application of pressure. All transition te…
Magnetic Properties and ApplicationsMagnetic and transport properties of perovskites and related materialsShape Memory Alloy Transformations
Hassan Raza、Edwin C. Kan2008-01-07arXiv
An atomistic model based on the spin-restricted extended Huckel theory (EHT) is presented for simulating electronic structure and I-V characteristics of graphene devices. The model is applied to zigzag and armchair graphene nano-ribbons (GNR) with and without hydrogen passivation, as well as for bilayer graphene. Furt…
Mesoscale and Nanoscale PhysicsMaterials Science
J. Briones、F. Montaigne、Daniel Lacour 等 6 位作者2008-01-07arXiv
The propagation of a domain wall in a submicron ferromagnetic spin-valve stripe is investigated using giant magnetoresistance. A notch in the stripe efficiently traps an injected wall stopping the domain propagation. The authors show that the magnetic field at which the wall is depinned displays a stochastic nature. M…
Materials Science
Jinsong Leng、Xin Lan、Y. J. Liu 等 8 位作者2008-01-07Applied Physics Letters
The electrical resistivity of a thermoresponsive polyurethane shape-memory polymer (SMP) filled with micron sized Ni powders is investigated in this letter. We show that, by forming conductive Ni chains under a weak static magnetic field (0.03T), the electrical conductivity of the SMP composite in the chain direction…
Conducting polymers and applicationsPolymer composites and self-healingAdvanced Sensor and Energy Harvesting Materials
Andrew Sunderland、LI Ju、Wayne McRae 等 4 位作者2008-01-07arXiv
In this paper we report a detailed investigation of a number of different materials commonly used in precision instrumentation in the view of using them as critical components in the magnetic gradiometer. The materials requirement inside a magnetic gradiometer is stringent because the presence of magnetic susceptible…
Materials Science
W. Chen、J-M. L. Beaujour、G. de Loubens 等 5 位作者2008-01-07arXiv
Spin-torque driven ferromagnetic resonance (ST-FMR) is used to study thin Co/Ni synthetic layers with perpendicular anisotropy confined in spin-valve based nanojunctions. Field swept ST-FMR measurements were conducted with a magnetic field applied perpendicular to the layer surface. The resonance lines were measured u…
Mesoscale and Nanoscale PhysicsMaterials Science
Naveen V. Kulkarni、Soumen Karmakar、Indrani Banerjee 等 7 位作者2008-01-07arXiv
The control of the crystalline phases of the nanoparticles grown in a direct-current transferred-arc plasma-assisted reactor is reported. The crystalline phases of the as synthesized nanoparticles are shown to critically depend on the operating gas pressure. The paper reports about the change in the crystalline phases…
Materials Science
K. Takenaka、K. Asano、M. Misawa 等 4 位作者2008-01-07Applied Physics Letters
Giant negative thermal expansion (NTE) recently discovered in antiperovskite manganese nitrides Mn3AN (A=Zn,Ga, etc.) is achieved by doping Ge on A as “relaxant” of the sharp volume change at the magnetic transition. To promote wider applications, we synthesized NTE antiperovskites without expensive Ge. We discovered…
Advanced Battery Materials and TechnologiesFerroelectric and Piezoelectric MaterialsThermal Expansion and Ionic Conductivity
Harini G. Sundararaghavan、Gary A. Monteiro、Norman A. Lapin 等 6 位作者2008-01-07Journal of Biomedical Materials Research Part A
Controlled crosslinking of collagen gels has important applications in cell and tissue mechanics as well as tissue engineering. Genipin is a natural plant extract that has been shown to crosslink biological tissues and to produce color and fluorescence changes upon crosslinking. We have characterized the effects of ge…
Cellular Mechanics and InteractionsCollagen: Extraction and CharacterizationTendon Structure and Treatment
C. Faugeras、A. Nerrière、M. Potemski 等 7 位作者2008-01-07arXiv
The results of micro-Raman scattering measurements performed on three different “graphitic” materials: microstructured disks of highly oriented pyrolytic graphite, graphene multilayers thermally decomposed from carbon-terminated surface of 4H-SiC and an exfoliated graphene monolayer are presented. Despite its multilay…
Graphite, nuclear technology, radiation studiesThermal properties of materialsGraphene research and applications
Deborah Prezzi、Daniele Varsano、Alice Ruini 等 5 位作者2008-01-07arXiv
We investigate from first principles the optoelectronic properties of nanometer-sized armchair graphene nanoribbons (GNRs). We show that many-body effects are essential to correctly describe both energy gaps and optical response. As a signature of the confined geometry, we observe strongly bound excitons dominating th…
2D Materials and ApplicationsGraphene research and applicationsQuantum and electron transport phenomena