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Are trinuclear superhalogens promising candidates for building blocks of novel magnetic materials? A theoretical prospect from combined broken-symmetry density functional theory and ab initio study

Yang Yu、Chen Li、Bing Yin 等 7 位作者2013-08-06The Journal of Chemical Physics

The structures, relative stabilities, vertical electron detachment energies, and magnetic properties of a series of trinuclear clusters are explored via combined broken-symmetry density functional theory and ab initio study. Several exchange-correlation functionals are utilized to investigate the effects of different…

Magnetism in coordination complexesAdvanced Condensed Matter PhysicsInorganic Chemistry and Materials

Bioactive baculovirus nanohybrids for stent based rapid vascular re-endothelialization

Arghya Paul、Cynthia B. Elias、Dominique Shum‐Tim 等 4 位作者2013-08-06Scientific Reports

Present study, for the first time, reports the development of a nanohybridized baculovirus based stent that can locally promote vascular re-endothelialization by efficient delivery of pro-angiogenic vascular endothelial growth factor (Vegf) genes. In vitro data demonstrated rapid expression of functionally active Vegf…

Angiogenesis and VEGF in CancerElectrospun Nanofibers in Biomedical Applications3D Printing in Biomedical Research

Polydiacetylene‐Peptide 1D Nanomaterials

Stephen R. Diegelmann、John D. Tovar2013-08-06Macromolecular Rapid Communications

Polydiacetylenes have received intense attention on account of their well-established chromic alterations that are detectable often by the naked eye, making them ideal for a variety of applications such as biosensory materials. These polymers have been fabricated in a variety of materials platforms including 3D crysta…

Antimicrobial Peptides and ActivitiesSupramolecular Self-Assembly in MaterialsPolydiacetylene-based materials and applications

Dose-Related Alterations of Carbon Nanoparticles in Mammalian Cells Detected Using Biospectroscopy: Potential for Real-World Effects

Junyi Li、Rebecca Strong、Júlio Trevisan 等 7 位作者2013-08-06Environmental Science & Technology

Nanotechnologies generate a wide range of engineered nanomaterials that enter into our ecosystem, especially carbon-based nanoparticles (CNPs). As these novel materials acquire ever increasing numbers of applications, they may pose a risk to organisms, including humans. However, our knowledge of nanoparticle-induced e…

Nanoparticles: synthesis and applicationsSpectroscopy Techniques in Biomedical and Chemical Research

Redox Reactions in Prussian Blue Analogue Films with Fast Na+ Intercalation

Masamitsu Takachi、Tomoyuki Matsuda、Yutaka Moritomo2013-08-06Japanese Journal of Applied Physics

Electronic state of cobalt and manganese Prussian blue analogues were systematically investigated against Na+ intercalation by means of the infrared and X-ray absorption spectroscopies. The spectroscopies revealed that 3.8 and 3.4 V plateaus in the discharge curve of Na x Co[Fe(CN)6]0.902.9H2O (denoted as NCF90) are a…

Advancements in Battery MaterialsSupercapacitor Materials and FabricationAdvanced Battery Materials and Technologies

Syntheses, Crystal Structures, and Physical Properties of Two Noninterpenetrated Pillar-Layered Metal–Organic Frameworks Based on N,N′-Di(4-pyridyl)-1,4,5,8-naphthalenetetracarboxydiimide Pillar

Lei Han、Lan-Ping Xu、Lan Qin 等 6 位作者2013-08-06Crystal Growth & Design

Two 3D noninterpenetrated pillar-layered metal–organic frameworks have been synthesized under solvothermal reactions based on a N, N ′-di(4-pyridyl)-1,4,5,8-naphthalenetetracarboxydiimide (DPNDI) pillar. Single-crystal X-ray diffraction analyses revealed that compound [Co 3 (BDC) 3 (DPNDI)(DMF) 2 ]·2CH 3 CN ( 1 ) disp…

Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesCovalent Organic Framework Applications

Atomic Force Microscopy Nanomechanics Visualizes Molecular Diffusion and Microstructure at an Interface

Dong Wang、Thomas P. Russell、Toshio Nishi 等 4 位作者2013-08-06ACS Macro Letters

Here we demonstrate a simple, yet powerful method, atomic force microscopy (AFM) nanomechanical mapping, to directly visualize the interdiffusion and microstructure at the interface between two polymers. Nanomechanical measurements on the interface between poly(vinyl chloride) (PVC) and poly(caprolactone) (PCL) allow…

Polymer Nanocomposites and PropertiesPolymer Surface Interaction StudiesForce Microscopy Techniques and Applications

Protective Organic Coatings with Anticorrosive and Other Feedback-Active Features: Micro- and Nanocontainers-Based Approach

Dmitry Grigoriev、D. Akcakayiran、Matthias Schenderlein 等 4 位作者2013-08-06CORROSION

Development of materials possessing the ability to recover their main function(s) in response to destructive impacts is, today, one of most rapidly growing fields in material science. In particular, protective organic coatings with the features to heal or restore their protective function autonomously are of great int…

Advanced Polymer Synthesis and CharacterizationPolymer composites and self-healingPolymer Surface Interaction Studies

Molecular Weight Dependence of Exciton Diffusion in Poly(3‐hexylthiophene)

Zarifi Masri、Arvydas Ruseckas、E. V. Emelianova 等 13 位作者2013-08-06Advanced Energy Materials

Abstract A joint experimental and theoretical study of singlet exciton diffusion in spin‐coated poly(3‐hexylthiophene) (P3HT) films and its dependence on molecular weight is presented. The results show that exciton diffusion is fast along the co‐facial π–π aggregates of polymer chromophores and about 100 times slower…

Organic Electronics and PhotovoltaicsOrganic Light-Emitting Diodes ResearchConducting polymers and applications

Boron neutron capture therapy induces cell cycle arrest and cell apoptosis of glioma stem/progenitor cells in vitro

Ting Sun、Zizhu Zhang、Bin Li 等 9 位作者2013-08-06Radiation Oncology

BACKGROUND: Glioma stem cells in the quiescent state are resistant to clinical radiation therapy. An almost inevitable glioma recurrence is due to the persistence of these cells. The high linear energy transfer associated with boron neutron capture therapy (BNCT) could kill quiescent and proliferative cells. METHODS:…

Boron and Carbon Nanomaterials ResearchRadiopharmaceutical Chemistry and ApplicationsBoron Compounds in Chemistry

Surface integral method for second harmonic generation in metal nanoparticles including both local-surface and nonlocal-bulk sources

Carlo Forestiere、Antonio Capretti、Giovanni Miano2013-08-06Journal of the Optical Society of America B

We propose a numerical method, based on surface integral equations (SIE), for evaluating the second harmonic (SH) scattering by metal nanoparticles (NPs) of arbitrary shape, considering both nonlocal-bulk and local-surface SH sources, induced by the electromagnetic field at the fundamental frequency. We demonstrate th…

Gold and Silver Nanoparticles Synthesis and ApplicationsMetamaterials and Metasurfaces ApplicationsPlasmonic and Surface Plasmon Research

Poly(3-hexylthiophene) Molecular Bottlebrushes via Ring-Opening Metathesis Polymerization: Macromolecular Architecture Enhanced Aggregation

Suk‐kyun Ahn、Deanna L. Pickel、W. Michael Kochemba 等 13 位作者2013-08-06ACS Macro Letters

We report a facile synthetic strategy based on a grafting through approach to prepare well-defined molecular bottlebrushes composed of regioregular poly(3-hexylthiophene) ( rr -P3HT) as the conjugated polymeric side chain. To this end, the exo -norbornenyl-functionalized P3HT macromonomer was synthesized by Kumada cat…

Fuel Cells and Related MaterialsPolymer Surface Interaction StudiesSynthetic Organic Chemistry Methods

Cement hydration: the role of adsorption and crystal growth

Gilberto Artioli、Jeffrey W. Bullard2013-08-06Crystal Research and Technology

Portland cement is a fundamental structural and binding material for industry and society. Its structural and physical properties at different scales show a complexity that can presently be barely managed through experimental and computational methods. State of the art problems and trends in cement studies will be bri…

Concrete and Cement Materials ResearchCalcium Carbonate Crystallization and InhibitionMagnesium Oxide Properties and Applications

Advances in semiconductor nanowire growth on graphene

A. Mazid Munshi、H. Weman2013-08-06physica status solidi (RRL) - Rapid Research Letters

Abstract magnified image Here we review the recent research activities on the epitaxial growth of semiconductor nanowires (NWs) on graphene substrates. Semiconductor NWs with quasi one‐dimensional structure have become an active research field due to their various interesting physical properties and potentials for fut…

Graphene research and applications2D Materials and ApplicationsNanowire Synthesis and Applications

Improving the rheological properties of crumb rubber modified binder using hydrogen peroxide

Khaldoun Shatanawi、Szabolcs Biro、Mohammad Naser 等 4 位作者2013-08-06Road Materials and Pavement Design

To overcome the problems of segregation between the rubber particles and the asphalt binder in the crumb rubber modified asphalts (CRMAs) different solutions were tested, including the establishment of chemical bonds between the different components of CRMA and the asphalt materials. In this research, a chemical metho…

Asphalt Pavement Performance EvaluationPolymer Nanocomposites and PropertiesInfrastructure Maintenance and Monitoring

Atomic Layer Epitaxy AlN for Enhanced AlGaN/GaN HEMT Passivation

Andrew D. Koehler、Neeraj Nepal、Travis J. Anderson 等 7 位作者2013-08-06IEEE Electron Device Letters

Enhancements in AlGaN/GaN high-electron-mobility transistor (HEMT) performance have been realized through ultrathin (4 nm) AlN passivation layers, formed by atomic layer epitaxy (ALE). A combination of ex situ and in situ surface cleans prepare the surface for deposition of ALE AlN. HEMTs passivated by high crystallin…

ZnO doping and propertiesGaN-based semiconductor devices and materialsGa2O3 and related materials

Enzyme-Modified Carbon-Fiber Microelectrode for the Quantification of Dynamic Fluctuations of Nonelectroactive Analytes Using Fast-Scan Cyclic Voltammetry

Leyda Z. Lugo‐Morales、Philip L. Loziuk、Amanda K. Corder 等 7 位作者2013-08-06Analytical Chemistry

Neurotransmission occurs on a millisecond time scale, but conventional methods for monitoring nonelectroactive neurochemicals are limited by slow sampling rates. Despite a significant global market, a sensor capable of measuring the dynamics of rapidly fluctuating, nonelectroactive molecules at a single recording site…

Electrochemical sensors and biosensorsConducting polymers and applicationsElectrochemical Analysis and Applications

Spectroscopy of light-molecule endofullerenes

Malcolm H. Levitt2013-08-06Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences

Molecular endofullerenes are supramolecular systems consisting of fullerene cages encapsulating small molecules. Although most early examples consist of encapsulated metal clusters, recently developed synthetic routes have provided endofullerenes with non-metallic guest molecules in high purity and macroscopic quantit…

Graphene research and applicationsFullerene Chemistry and ApplicationsSynthesis and Properties of Aromatic Compounds

Magnetization dynamics in permalloy films with stripe domains

Wee Tee Soh、Nguyen N. Phuoc、C.Y. Tan 等 4 位作者2013-08-06Journal of Applied Physics

Through a systematic investigation of the field-dependent dynamic magnetization of a series of NiFe films with and without stripe domains in conjunction with the static magnetization process, we demonstrate that the experimental rotatable anisotropy field is not a fixed value but strongly varied with the external in-p…

Magnetic properties of thin filmsTheoretical and Computational PhysicsMagnetic Properties and Applications

Conformational states and recognition of amyloidogenic peptides of human insulin-degrading enzyme

Lauren A. McCord、Wenguang Liang、Evan Dowdell 等 8 位作者2013-08-06Proceedings of the National Academy of Sciences

Insulin-degrading enzyme (IDE) selectively degrades the monomer of amyloidogenic peptides and contributes to clearance of amyloid β (Aβ). Thus, IDE retards the progression of Alzheimer's disease. IDE possesses an enclosed catalytic chamber that engulfs and degrades its peptide substrates; however, the molecular mechan…

Protein Structure and DynamicsAlzheimer's disease research and treatmentsEnzyme Structure and Function