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Jahn–Teller Effect in the B12F12 Radical Anion and Energetic Preference of an Octahedral B6(BF2)6 Cluster Structure over an Icosahedral Structure for the Elusive Neutral B12F12

Moritz Malischewski、Eric V. Bukovsky、Steven H. Strauss 等 4 位作者2015-11-25Inorganic Chemistry

The B12F12(-) radical anion was generated by oxidation of [CoCp2(+)]2B12F12(2-) with AsF5 in SO2. In the crystal structure of [CoCp2(+)]B12F12(-), the anion displays a lowered symmetry (D2h) instead of an Ih-symmetric dianion as a result of Jahn-Teller distortion. Moreover, shortening of the B-F bonds and subtle chang…

Boron and Carbon Nanomaterials ResearchRadiopharmaceutical Chemistry and ApplicationsBoron Compounds in Chemistry

Magnetic Modulation of Surface Plasmon Resonance by Tailoring Magnetically Responsive Metallic Block in Multisegment Nanorods

Insub Jung、Hee‐Jeong Jang、Songhee Han 等 5 位作者2015-11-25Chemistry of Materials

The modulation of quasi-one-dimensional plasmonic nanorods via the utilization of localized surface plasmon resonance is critical for achieving local dynamic tuning on the nanoscale as well as for fundamental studies. In particular, a magnetic field has been used as an effective external stimulus that can be activated…

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

Controlled Directional Motions of Molecular Vehicles, Rotors, and Motors: From Metallic to Silicon Surfaces, a Strategy to Operate at Higher Temperatures

Frédéric Chérioux、Olivier Galangau、Frank Palmino 等 4 位作者2015-11-25ChemPhysChem

In the last decade, many nanomachines with controlled molecular motions have been studied, mainly on metallic surfaces, which are easy to obtain very clean, and are stable over months. However, the studies of mechanical properties of nanomachines are mainly performed at very low temperatures, usually between 5 and 80…

Supramolecular Chemistry and ComplexesPorphyrin and Phthalocyanine ChemistrySupramolecular Self-Assembly in Materials

Microstructural and Topochemical Characterization of Thermally Modified Poplar (Populus cathayaha) Cell Wall

Zhe Ling、Zhe Ji、Dayong Ding 等 5 位作者2015-11-25BioResources

Although many studies have been conducted on the wood property and chemical changes caused by thermal modification, little has been reported on the microstructural and topochemical changes occurring in the cell wall during heat treatment. In this study, poplar (Populus cathayaha) was treated within a temperature range…

Wood Treatment and PropertiesNatural Fiber Reinforced CompositesBamboo properties and applications

Off–on fluorometric detection of cyanide anions in an aqueous mixture by an indane-based receptor

Yasuhiro Shiraishi、Masaya Nakamura、Tetsuri Kogure 等 4 位作者2015-11-25New Journal of Chemistry

An indanedione–coumarin conjugate behaves as an off–on type fluorescent receptor for rapid, selective, and sensitive detection of cyanide anions in an aqueous mixture via a nucleophilic interaction with the electrophilic β-carbon of the receptor.

Molecular Sensors and Ion DetectionLuminescence and Fluorescent MaterialsSulfur Compounds in Biology

EGFR/HER2 inhibitors effectively reduce the malignant potential of MDR breast cancer evoked by P-gp substrates in vitro and in vivo

Yiting Jin、Wei Zhang、Hongying Wang 等 7 位作者2015-11-25Oncology Reports

Multidrug resistance (MDR) induced by chemotherapy in breast cancer frequently leads to tumor invasion, metastasis and poor clinical outcome. We preliminarily found that the epidermal growth factor receptor (EGFR) is involved in enhancing the malignant potential of MDR breast cancer cells, but the mechanism remains un…

Nanoparticle-Based Drug DeliveryDrug Transport and Resistance MechanismsCancer therapeutics and mechanisms

Coatings for Superalloys

Mathias C. Galetz2015-11-25Superalloys

High-temperature coatings for superalloys can be divided into three categories: Two of them, diffusion and overlay coatings, are both used to protect a system from oxidation and corrosion. The third type, thermal barrier coatings, protects the substrate from thermal degradation.

High-Temperature Coating BehaviorsHigh Temperature Alloys and CreepNuclear Materials and Properties

Large π-Conjugated Quinacridone Derivatives: Syntheses, Characterizations, Emission, and Charge Transport Properties

Weiping Chen、Kui Tian、Xiaoxian Song 等 7 位作者2015-11-25Organic Letters

Two 11-ring-fused quinacridone derivatives, TTQA and DCNTTQA, have been synthesized by ferric chloride mediated cyclization and Knoevenagel reaction. Replacement of the carbonyl groups (in TTQA) with dicyanoethylene groups (in DCNTTQA) not only red-shifted the emission to the near-infrared region but also led to a non…

Organic Electronics and PhotovoltaicsOrganic Light-Emitting Diodes ResearchLuminescence and Fluorescent Materials

Separation and quantification of quantum dots and dissolved metal cations by size exclusion chromatography–ICP-MS

Pooya Paydary、Philip Larese‐Casanova2015-11-25International Journal of Environmental & Analytical Chemistry

The prevalence of engineered metallic nanoparticles within electronic products has evoked a need to assess their occurrence and fate within environmental systems upon potential release of these nanoparticles. Quantum dots (QDs) are mixed-metal nanocrystals with the smallest of particle sizes (2–10 nm) that readily lea…

Nanoparticles: synthesis and applicationsAnalytical chemistry methods developmentElectrochemical Analysis and Applications

Polytype Attainability in III–V Semiconductor Nanowires

Jonas Johansson、Zeila Zanolli、Kimberly A. Dick2015-11-25Crystal Growth & Design

We propose a model that explains the phenomenon of polytypism in metal particle-seeded III–V semiconductor nanowires. The model is based on classical nucleation theory, utilizing the axial next-nearest-neighbor Ising (ANNNI) model to account for interlayer interaction up to the third nearest-neighboring layer. We inve…

ZnO doping and propertiesSemiconductor materials and devicesNanowire Synthesis and Applications

Hispolon inhibits breast cancer cell migration by reversal of epithelial-to-mesenchymal transition via suppressing the ROS/ERK/Slug/E-cadherin pathway

Zhao Zhao、Yisheng Sun、Wei Chen 等 5 位作者2015-11-25Oncology Reports

Hispolon has been shown to have anticancer effects on various tumors. However, whether hispolon exerts anti-migration activity in breast cancer cells and the underlying mechanisms, have not been elucidated yet. In the present study, our data demonstrated that hispolon inhibited TPA-induced breast cancer MCF-7 cell mig…

Nanoparticle-Based Drug DeliveryCancer Cells and MetastasisMechanisms of cancer metastasis

Characterisation of the L-mode scrape off layer in MAST: decay lengths

F. Militello、L. Garzotti、J. Harrison 等 9 位作者2015-11-25Nuclear Fusion

Abstract This work presents a detailed characterisation of the MAST Scrape Off Layer in L-mode. Scans in line averaged density, plasma current and toroidal magnetic field were performed. A comprehensive and integrated study of the SOL was allowed by the use of a wide range of diagnostics. In agreement with previous re…

Ionosphere and magnetosphere dynamicsMagnetic confinement fusion researchFusion materials and technologies

Aspen Plus Simulation of Biomass Gasification with Known Reaction Kinetic

Marianne S. Eikeland、Rajan K. Thapa、B. M. Halvorsen2015-11-25Linköping electronic conference proceedings

The energy from biomass can be utilized through the thermochemical conversion processes of pyrolysis and gasification. The Aspen Plus simulation tool is applicable for simulation of the gasification processes.

Thermochemical Biomass Conversion ProcessesThermal and Kinetic AnalysisHeat transfer and supercritical fluids

Relationship between Mobility and Lattice Strain in Electrochemically Doped Poly(3-hexylthiophene)

Jacob L. Thelen、Shao-Ling Wu、Anna E. Javier 等 6 位作者2015-11-25ACS Macro Letters

Conjugated semiconducting polymers, such as poly(3-hexylthiophene) (P3HT), are poised to play an integral role in the development of organic electronic devices; however, their performance is governed by factors that are intrinsically coupled: dopant concentration, carrier mobility, crystal structure, and mesoscale mor…

Organic Electronics and PhotovoltaicsConducting polymers and applicationsSemiconductor materials and interfaces

Drift-induced modifications to the dynamical polarization of graphene

Mohsen Sabbaghi、Hyun‐Woo Lee、Tobias Stauber 等 4 位作者2015-11-25Physical Review B

The response function of graphene is calculated in the presence of a constant current across the sample. For small drift velocities and finite chemical potential, analytic expressions are obtained and consequences on the plasmonic excitations are discussed. For general drift velocities and zero chemical potential, num…

Quantum Information and CryptographyGold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon Research

Star-like copolymer stabilized noble-metal nanoparticle powders

Peng-Fei Cao、Yun-Hui Yan、Joey Dacula Mangadlao 等 5 位作者2015-11-25Nanoscale

The amphiphilic star-like copolymer polyethylenimine-block-poly(ε-caprolactone) (PEI-b-PCL) was utilized to transfer the pre-synthesized citrate-capped noble metal nanoparticles (NMNPs) from an aqueous layer to an organic layer without any additional reagents. Dynamic light scattering (DLS) and transmission electron m…

Gold and Silver Nanoparticles Synthesis and ApplicationsMolecular Junctions and NanostructuresNanomaterials for catalytic reactions

Synthesis and Self-Assembly of Amphiphilic Triblock Terpolymers with Complex Macromolecular Architecture

George Polymeropoulos、George Zapsas、Nikos Hadjichristidis 等 4 位作者2015-11-25ACS Macro Letters

of PS (polystyrene), P2VP (poly(2-vinylpyridine)), and PEO (poly(ethylene oxide)), never reported before, were synthesized by combining atom transfer radical and anionic polymerizations. The synthesis involves the transformation of the -Br groups of the previously reported Br-terminated 3-arm star diblock copolymers t…

Advanced Polymer Synthesis and CharacterizationPolymer Surface Interaction StudiesDendrimers and Hyperbranched Polymers

Shape-controlled growth of metal nanoparticles: an atomistic view

Mine Konuk、Sondan Durukanoğlu2015-11-25Physical Chemistry Chemical Physics

Recent developments in shape-controlled synthesis of metallic nano-particles present a promising path for precisely tuning chemical activity, selectivity, and stability of nano-materials. While previous studies have highlighted the macroscopic description of synthesis processes, there is less understanding as to wheth…

Gold and Silver Nanoparticles Synthesis and ApplicationsNanocluster Synthesis and Applicationsnanoparticles nucleation surface interactions

Metal-insulator transition in a weakly interacting disordered electron system

Chinedu E. Ekuma、Shuxiang Yang、Hanna Terletska 等 7 位作者2015-11-25Physical Review B

The interplay of interactions and disorder is studied using the Anderson-Hubbard model within the typical medium dynamical cluster approximation. Treating the interacting, nonlocal cluster self-energy $[{\mathrm{\ensuremath{\Sigma}}}_{c}[\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{\mathcal{G}}](i,j\ensuremath{\ne}i)]$…

Quantum and electron transport phenomenaOrganic and Molecular Conductors ResearchQuantum, superfluid, helium dynamics