bluuebunny/crossref_metadata_2025 huggingface dataset:
A Facile Synthesis of Nitrogen-Doped Highly Porous Carbon Nanoplatelets: Efficient Catalysts for Oxygen Electroreduction
Authors: Zhang Yaqing , Zhang Xianlei , Ma Xiuxiu , Guo Wenhui , Wang Chunchi , Asefa Tewodros , He Xingquan
Published: February 2017

The oxygen reduction reaction (ORR) is of great importance for various renewable energy conversion technologies such as fuel cells and metal-air batteries. Heteroatom-doped carbon nanomaterials have proven to be robust metal-free electrocatalysts for ORR in the above-mentioned energy devices. Herein, we demonstrate the synthesis of novel highly porous N-doped carbon nanoplatelets (N-HPCNPs) derived from oatmeal (or a biological material) and we show the materials’ high-efficiency as electrocatalyst for ORR. The obtained N-HPCNPs hybrid materials exhibit superior electrocatalytic activities towards ORR, besides excellent stability and good methanol tolerance in both basic and acidic electrolytes. The unique nanoarchitectures with rich micropores and mesopores, as well as the high surface area-to-volume ratios, present in the materials significantly increase the density of accessible catalytically active sites in them and facilitate the transport of electrons and electrolyte within the materials. Consequently, the N-HPCNPs catalysts hold a great potential to serve as low-cost and highly efficient cathode materials in direct methanol fuel cells (DMFCs).
Influence of Doping and Excitation Powers on Optical Thermometry in Yb3+-Er3+ doped CaWO4
Authors: Wang Xiangfu , Wang Yemin , Bu Yanyan , Yan Xiaohong , Wang Jing , Cai Peiqing , Vu Thiquynh , Seo Hyo Jin
Published: February 2017

Optical thermometry has been widely studied to achieve an inaccessible temperature measurement in submicron scale and it has been reported that the temperature sensitivity depends mainly on host types. In this work, we propose a new method to improve the optical temperature sensitivity of Yb3+-Er3+ co-doped CaWO4 phosphors by doping with Li+, Sr2+, and Mg2+ ions and by controlling excitation powers of 980 nm laser. It is found that the thermometric parameters such as upconversion emission intensity, intensity ratio of green-to-red emission, fluorescence color, emission intensity ratios of thermally coupled levels (2H11/2/4S3/2), and relative and absolute temperature sensitivity can be effectively controlled by doping with Li+, Sr2+, and Mg2+ ions in the Yb3+-Er3+ co-doped CaWO4 system. Moreover, the relative sensitivity SR and the absolute sensitivity SA are proved to be dependent on the pump power of 980 nm laser. The sensitivities of SR and SA in Yb3+-Er3+ co-doped CaWO4 increase about 31.5% and 12%, respectively, by doping with 1 mol% Sr2+.
Simple platform for chronic imaging of hippocampal activity during spontaneous behaviour in an awake mouse
Authors: Villette Vincent , Levesque Mathieu , Miled Amine , Gosselin Benoit , Topolnik Lisa
Published: February 2017

Chronic electrophysiological recordings of neuronal activity combined with two-photon Ca2+ imaging give access to high resolution and cellular specificity. In addition, awake drug-free experimentation is required for investigating the physiological mechanisms that operate in the brain. Here, we developed a simple head fixation platform, which allows simultaneous chronic imaging and electrophysiological recordings to be obtained from the hippocampus of awake mice. We performed quantitative analyses of spontaneous animal behaviour, the associated network states and the cellular activities in the dorsal hippocampus as well as estimated the brain stability limits to image dendritic processes and individual axonal boutons. Ca2+ imaging recordings revealed a relatively stereotyped hippocampal activity despite a high inter-animal and inter-day variability in the mouse behavior. In addition to quiet state and locomotion behavioural patterns, the platform allowed the reliable detection of walking steps and fine speed variations. The brain motion during locomotion was limited to ~1.8 μm, thus allowing for imaging of small sub-cellular structures to be performed in parallel with recordings of network and behavioural states. This simple device extends the drug-free experimentation in vivo, enabling high-stability optophysiological experiments with single-bouton resolution in the mouse awake brain.
Enhancing lysosomal biogenesis and autophagic flux by activating the transcription factor EB protects against cadmium-induced neurotoxicity
Authors: Pi Huifeng , Li Min , Tian Li , Yang Zhiqi , Yu Zhengping , Zhou Zhou
Published: February 2017

Cadmium (Cd), a highly ubiquitous heavy metal, is a well-known inducer of neurotoxicity. However, the mechanism underlying cadmium-induced neurotoxicity remains unclear. In this study, we found that Cd inhibits autophagosome-lysosome fusion and impairs lysosomal function by reducing the levels of lysosomal-associated membrane proteins, inhibiting lysosomal proteolysis and altering lysosomal pH, contributing to defects in autophagic clearance and subsequently leading to nerve cell death. In addition, Cd decreases transcription factor EB (TFEB) expression at both the mRNA and protein levels. Furthermore, Cd induces the nuclear translocation of TFEB and TFEB target-gene expression, associated with compromised lysosomal function or a compensatory effect after the impairment of the autophagic flux. Notably, restoration of the levels of lysosomal-associated membrane protein, lysosomal proteolysis, lysosomal pH and autophagic flux through Tfeb overexpression protects against Cd-induced neurotoxicity, and this protective effect is incompletely dependent on TFEB nuclear translocation. Moreover, gene transfer of the master autophagy regulator TFEB results in the clearance of toxic proteins and the correction of Cd-induced neurotoxicity in vivo. Our study is the first to demonstrate that Cd disrupts lysosomal function and autophagic flux and manipulation of TFEB signalling may be a therapeutic approach for antagonizing Cd-induced neurotoxicity.
TRPA1 mediated aggravation of allergic contact dermatitis induced by DINP and regulated by NF-κB activation
Authors: Kang Jun , Ding Yong , Li Baizhan , Liu Hong , Yang Xu , Chen Mingqing
Published: February 2017

The possible pathogenic role and mechanism of Di-iso-nonyl phthalate (DINP) in allergic dermatitis is still controversial. This work has shown that oral exposure to DINP exacerbated allergic dermatitis tissue lesions in FITC-sensitized mice. The lesions was accompanied by an enhancement of TRPA1 expression and an increase in IgG1, IL-6 and IL-13 levels. This work also found that blocking TRPA1 by HC030031 effectively prevented the development of allergic dermatitis resulting from oral exposure to DINP and/or FITC-sensitized mice. This result is marked by the down regulation of IgG1 levels, a reduction in mast cell degranulation and a decrease in IL-6 and IL-13 levels. We also showed that blocking NF-κB inhibited TRPA1 expression, and that blocking TRPA1 had no significant effect on the activation of NF-κB or TSLP expression. This study helps in understanding the role DINP exposure plays in the development of allergic dermatitis and provides new insight into the mechanisms behind the DINP-induced adjuvant effect.
A hybrid MBE-based growth method for large-area synthesis of stacked hexagonal boron nitride/graphene heterostructures
Authors: Wofford Joseph M. , Nakhaie Siamak , Krause Thilo , Liu Xianjie , Ramsteiner Manfred , Hanke Michael , Riechert Henning , J. Lopes J. Marcelo
Published: February 2017

Van der Waals heterostructures combining hexagonal boron nitride (h-BN) and graphene offer many potential advantages, but remain difficult to produce as continuous films over large areas. In particular, the growth of h-BN on graphene has proven to be challenging due to the inertness of the graphene surface. Here we exploit a scalable molecular beam epitaxy based method to allow both the h-BN and graphene to form in a stacked heterostructure in the favorable growth environment provided by a Ni(111) substrate. This involves first saturating a Ni film on MgO(111) with C, growing h-BN on the exposed metal surface, and precipitating the C back to the h-BN/Ni interface to form graphene. The resulting laterally continuous heterostructure is composed of a top layer of few-layer thick h-BN on an intermediate few-layer thick graphene, lying on top of Ni/MgO(111). Examinations by synchrotron-based grazing incidence diffraction, X-ray photoemission spectroscopy, and UV-Raman spectroscopy reveal that while the h-BN is relaxed, the lattice constant of graphene is significantly reduced, likely due to nitrogen doping. These results illustrate a different pathway for the production of h-BN/graphene heterostructures, and open a new perspective for the large-area preparation of heterosystems combining graphene and other 2D or 3D materials.
The Influence of Protein Intake on Calcium Balance
Authors: Rouy E. , Tome D.
Published: February 2017

Protein and calcium metabolisms interact at multiple levels. It is well known that an increase in the protein content of the diet causes an increase of the calcium concentration in the urine. However, the exact consequences of protein intake on the calcium economy are debated. Indeed, there are two explanations for increased calciuria: increased calcium absorption or increased bone resorption. Currently, there is no clear answer; however, there is increasing evidence that protein intake is not harmful to bone. In fact, an increased protein intake would probably be beneficial for bone. This chapter reviews the different aspects of the protein–calcium interaction and discusses the proposed mechanisms. The consequences for health are also considered, especially on bone strength and kidney-stone formation.
Three-dimensional defocused orientation sensing of single bimetallic core–shell gold nanorods as multifunctional optical probes
Authors: Kim Geun Wan , Lee So Young , Ha Ji Won
Published: February 2017

The defocused scattering field distributions enabled a determination of the 3D orientations of single bimetallic AuNRs without angular degeneracy through a pattern-match analysis technique.
Confocal Raman imaging and chemometrics applied to solve forensic document examination involving crossed lines and obliteration cases by a depth profiling study
Authors: Borba Flávia de Souza Lins , Jawhari Tariq , Saldanha Honorato Ricardo , de Juan Anna
Published: February 2017

This article describes a non-destructive analytical method developed to solve forensic document examination problems involving crossed lines and obliteration.
Surface-assisted laser desorption/ionization time-of-flight mass spectrometry of small drug molecules and high molecular weight synthetic/biological polymers using electrospun composite nanofibers
Authors: Bian Juan , Olesik Susan V.
Published: February 2017

Polyacrylonitrile/Nafion®/carbon nanotube (PAN/Nafion®/CNT) composite nanofibers were prepared using electrospinning.
Multiple bifurcations with signal enhancement in nonlinear mid-infrared thermal lens spectroscopy
Authors: Totachawattana Atcha , Hong Mi K. , Erramilli Shyamsunder , Sander Michelle Y.
Published: February 2017

Mid-infrared nonlinear photothermal spectroscopy with multiple bifurcations is demonstrated on liquid crystals across multiple phase transitions.
Ultrafast laser-probing spectroscopy for studying molecular structure of protein aggregates
Authors: Jung Huihun , Szwejkowski Chester J. , Pena-Francesch Abdon , Tomko John A. , Allen Benjamin , Özdemir Şahin Kaya , Hopkins Patrick , Demirel Melik C.
Published: February 2017

We report the development of a new technique to screen protein aggregation based on laser-probing spectroscopy with sub-picosecond resolution.
Detection of reactive aldehyde biomarkers in biological samples using solid-phase extraction pre-concentration and liquid chromatography with fluorescence detection
Authors: Hogard Michael L. , Lunte Craig E. , Lunte Susan M.
Published: February 2017

Fluorescence derivatization allows for detection of lipid peroxidation biomarkers of epilepsy-induced oxidative stress.
Ni–Al/layered double hydroxide/Ag nanoparticle composite modified carbon-paste electrode as a renewable electrode and novel electrochemical sensor for hydrogen peroxide
Authors: Habibi Biuck , Azhar Fahimeh Farshi , Fakkar Jhila , Rezvani Zolfaghar
Published: February 2017

Cyclic voltammograms of the bare CPE (a and c) and Ni–Al/LDH/Ag NPs/CPE (b and d) respectively in the presence and absence of. Inset is cyclic voltammograms Ni–Al/LDH/CPE in the absence (a) and presence (b) of H2O2.
Naphthalene diimide-difluorobenzene-based polymer acceptors for all-polymer solar cells
Authors: Deng Ping , Ho Carr Hoi Yi , Lu Yong , Li Ho-Wa , Tsang Sai-Wing , So Shu Kong , Ong Beng S.
Published: February 2017

Two new difluorobenzene-naphthalene diimide polymer acceptors, P1 and P2, were developed as polymer acceptors for all-polymer solar cells.
Real-time monitoring of conformational transitions of single-molecule histone deacetylase 8 with nanocircuits
Authors: You Seungyong , Froberg James , Yu Junru , Haldar Manas , Sedigh Abbas , Mallik Sanku , Srivastava D. K. , Choi Yongki
Published: February 2017

A novel, electronic single-molecule approach captures the dynamic conformational interconversion of HDAC8 and various ligands during the catalytic reaction.
3R phase of MoS2 and WS2 outperforms the corresponding 2H phase for hydrogen evolution
Authors: Toh Rou Jun , Sofer Zdeněk , Luxa Jan , Sedmidubský David , Pumera Martin
Published: February 2017

Herein, we compare the bulk, 2H and 3R phases of two most prevalent TMD materials: MoS2 and WS2.
Hydrogen autotransfer and related dehydrogenative coupling reactions using a rhenium(i) pincer catalyst
Authors: Piehl Patrick , Peña-López Miguel , Frey Anna , Neumann Helfried , Beller Matthias
Published: February 2017

A novel rhenium complex bearing a non-innocent PNP pincer ligand was prepared.
Quantitative assessment of kosmotropicity of hydrated ionic liquids by nuclear magnetic resonance
Authors: Nikawa Yohsuke , Fujita Kyoko , Ohno Hiroyuki
Published: February 2017

The NMR chemical shift variation of H2O varied with the component ion and reflected the kosmotropicity quantitatively in hydrated ionic liquids.
Preservation of electronic properties of double-decker complexes on metallic supports
Authors: Cirera B. , Matarrubia J. , Kaposi T. , Giménez-Agulló N. , Paszkiewicz M. , Klappenberger F. , Otero R. , Gallego J. M. , Ballester P. , Barth J. V. , Miranda R. , Galán-Mascarós J. R. , Auwärter W. , Ecija D.
Published: February 2017

We report a multi-method study of the self-assembly and electronic invariance of double-decker complexes on distinct metal surfaces.
Reactivity of4Fe+(CO)n=0–2+ O2: oxidation of CO by O2at an isolated metal atom
Authors: Ard Shaun G. , Martinez Oscar , Brown Steven A. , Sawyer Jordan C. , Armentrout P. B. , Viggiano Albert A. , Shuman Nicholas S.
Published: February 2017

The kinetics of Fe+(CO)n+ O2yield insight on the mechanism of O2bond cleavage and CO oxidation occurring at a single non-noble metal atom.
Oligomerization process of Bcl-2 associated X protein revealed from intermediate structures in solution
Authors: Shih Orion , Yeh Yi-Qi , Liao Kuei-Fen , Sung Tai-Ching , Chiang Yun-Wei , Jeng U-Ser
Published: February 2017

Linear oligomerization of ditopic BAX-dimers into tri-dimer helical units then into a rod-like structure, as revealed using integrated ESR/SAXS/MD analyses.
Epitaxial chemical vapour deposition growth of monolayer hexagonal boron nitride on a Cu(111)/sapphire substrate
Authors: Uchida Yuki , Iwaizako Tasuku , Mizuno Seigi , Tsuji Masaharu , Ago Hiroki
Published: February 2017

Highly oriented, epitaxial growth of monolayer h-BN on Cu(111)/sapphire substrate by ambient pressure chemical vapour deposition.
Synthesis of three crystalline forms of Al2O3 featuring rod-like fibers and their effect on the gaseous degradation of 1-chloronaphthalene
Authors: Lu Huijie , Li Qianqian , Su Guijin , Zheng Minghui , Zhao Yuyang , Miao Xue , Liu Yalu , Huang Xinchen , Zhao Yanhui
Published: February 2017

The effect of different crystalline forms of Al2O3 on the degradation of CN-1 is shown where γ-Al2O3 displays superior oxidation activity.
The basket-type dimer layers based on tetra-electron reduced heteropoly blue directed by copper/nickel and strontium linkers
Authors: Wang Wei-wei , Lv Jing-hua , Yu Kai , Wang Chun-mei , Zhang He , Wu Chu , Zhou Bai-bin
Published: February 2017

Two basket-type dimer layers have been prepared, which exhibit highly efficient catalytic ability for the degradation of typical dyes and bifunctional electrocatalytic behaviors.
A computational study of aromaticity and photophysical properties of unsymmetrical azatrioxa[8]circulenes
Authors: Baryshnikov Gleb V. , Valiev Rashid R. , Minaev Boris F. , Ågren Hans
Published: February 2017

In the present work we have studied a series of unsymmetrical azatrioxa[8]circulenes in order to explain the impact of outer substituents and benzoannelation on photophysical constants and aromaticity of these compounds.
Synthesis of quaternary phosphonium N-chloramine biocides for antimicrobial applications
Authors: Li Lingdong , Zhou Hao , Gai Fangyuan , Chi Xiaofang , Zhao Yuebiao , Zhang Fengxiang , Zhao (Kent) Zongbao
Published: February 2017

We synthesized a phosphoniumN-chloramine biocide which has distinctively higher antimicrobial efficacy than the previously developed ammonium counterpart.
Nitrogen doped graphite felt decorated with porous Ni1.4Co1.6S4 nanosheets for 3D pseudocapacitor electrodes
Authors: Zhang Xiang , Zheng Yuying , Zhou Jun , Zheng Wenqing , Chen Dongyang
Published: February 2017

High performance 3D pseudocapacitor electrodes consisting of a nitrogen doped graphite felt (NGF) substrate and porous Ni1.4Co1.6S4 nanosheets has been successfully prepared via a facile hydrothermal reaction.
Fabrication of Co3O4 nanoparticles in thin porous carbon shells from metal–organic frameworks for enhanced electrochemical performance
Authors: Qiu Bin , Guo Wenhan , Liang Zibin , Xia Wei , Gao Song , Wang Qingfei , Yu Xiaofeng , Zhao Ruo , Zou Ruqiang
Published: February 2017

Ultrasmall Co3O4 nanoparticle with thin porous carbon shell is reported by employing metal–organic framework as precursor and CO2 as oxidizing atmosphere, which exhibits a long cycling stability and high rate performance for Li-ion battery.
Growth of Zr/N-codoped TiO2 nanorod arrays for enhanced photovoltaic performance of perovskite solar cells
Authors: Zhang Zhenlong , Li Junfeng , Wang Xiaoli , Qin Jianqing , Shi Wenjia , Liu Yuefeng , Gao Huiping , Mao Yanli
Published: February 2017

The PCE of Zr/N–TiO2 based solar cells is 31.6% higher than that of solar cells based on un-doped TiO2.
Fabrication of functional 3D multi-level microstructures on transparent substrates by one step back-side UV photolithography
Authors: Kang Myeongwoo , Byun Jae Hwan , Na Sangcheol , Jeon Noo Li
Published: February 2017

This paper describes simple photolithography-based methods to fabricate multi-level three-dimensional (3D) microstructures without repeated processes using flexible and transparent film substrates such as polyethylene terephthalate (PET).
An in situ formed MnO–Co composite catalyst layer over Ni–Ce0.8Sm0.2O2−x anodes for direct methane solid oxide fuel cells
Authors: Zhao Jie , Xu Xiaoyong , Zhou Wei , Zhu Zhonghua
Published: February 2017

An in situ formed MnO–Co composite, with Co distributed over MnO, improved the stability of conventional Ni–SDC anodes in wet CH4.
Electrochemical performance of Na0.6[Li0.2Ni0.2Mn0.6]O2 cathodes with high-working average voltage for Na-ion batteries
Authors: de la Llave Ezequiel , Nayak Prasant Kumar , Levi Elena , Penki Tirupathi Rao , Bublil Shaul , Hartmann Pascal , Chesneau Frederick-Francois , Greenstein Miri , Nazar Linda F. , Aurbach Doron
Published: February 2017

Lithium doping improves structural stability and increases average working potential of manganese oxide cathodes for sodium-ion batteries.
Engineering chemical reaction modules via programming the assembly of DNA hairpins
Authors: Song Tingjie , Wang Xiaojing , Liang Haojun
Published: February 2017

A DNA concentration monitor was constructed with integrated chemical reaction modules based on the catalytic assembly of DNA hairpins.
The size effect on the energy transfer in Bi3+–Eu3+ co-doped GdVO4 nanocrystals
Authors: Lenczewska K. , Gerasymchuk Y. , Vu N. , Liem N. Q. , Boulon G. , Hreniak D.
Published: February 2017

Nanocrystals of GdVO4 co-doped with various concentrations of Bi3+ and a constant concentration of Eu3+ ions (5 mol%) were synthesized by Pechini's method and annealed in the range of temperature from 750 °C to 900 °C in order to obtain different sizes of individual crystallites.
Novel bonding patterns and optoelectronic properties of the two-dimensional SixCymonolayers
Authors: Fan Dong , Lu Shaohua , Guo Yundong , Hu Xiaojun
Published: February 2017

Quasi-planar tetracoordinate and acetylenic (–CC–) carbon linkages in t-SiC and γ-silagraphyne.
Determination of mercury(ii) in water at sub-nanomolar levels by laser ablation-ICPMS analysis of screen printed electrodes used as a portable voltammetric preconcentration system
Authors: Abrego Zuriñe , Unceta Nora , Sánchez Alicia , Gómez-Caballero Alberto , Berrio-Ochoa Luis Maria , Aranzazu Goicolea M. , Barrio Ramón J.
Published: February 2017

Environmental pollution by mercury in ambient water samples is a recognized problem worldwide.
Preparation of molecularly imprinted polymeric microspheres based on distillation–precipitation polymerization for an ultrasensitive electrochemical sensor
Authors: Liu Yuan , Zhang Lu , Zhao Na , Han Yajie , Zhao Feilang , Peng Zhengchun , Li Yingchun
Published: February 2017

A highly sensitive electrochemical sensor based on a carbon paste electrode (CPE) modified with molecularly imprinted polymeric microspheres (MIPMSs) was developed for the determination of bisphenol A (BPA).
A sensitive and selective red fluorescent probe for imaging of cysteine in living cells and animals
Authors: Song Xuezhen , Dong Baoli , Kong Xiuqi , Wang Chao , Zhang Nan , Lin Weiying
Published: February 2017

Cysteine (Cys) is one of the important semi-essential amino acids, which often participates in many enzymatic reactions and has lots of biological functions.
N-Doped porous graphitic carbon with multi-flaky shell hollow structure prepared using a green and ‘useful’ template of CaCO3 for VOC fast adsorption and small peptide enrichment
Authors: He Xin , Sun Huaju , Zhu Meiping , Yaseen Muhammad , Liao Dankui , Cui Xuemin , Guan Haoyu , Tong Zhangfa , Zhao Zhenxia
Published: February 2017

Novel S-NPGCs with multi-flaky shell hollow structure were prepared using CaCO3 as a green/useful template for VOC fast adsorption and small peptide enrichment.
Metal-free benzannulation of 1,7-diynes towards unexpected 1-aroyl-2-naphthaldehydes and their application in fused aza-heterocyclic synthesis
Authors: Wang Ai-Fang , Zhou Peng , Zhu Yi-Long , Hao Wen-Juan , Li Guigen , Tu Shu-Jiang , Jiang Bo
Published: February 2017

A novel I2-mediated benzannulation of 1,7-diyne-involved 1,4-oxo-migration was established, providing unexpected 1-aroyl-2-naphthaldehydes. The resulting 1-aroyl-2-naphthaldehydes were successfully applied in the synthesis of polycyclic isoindoles.
Selective hydrogenation of nitroarenes to aminoarenes using a MoOx-modified Ru/SiO2 catalyst under mild conditions
Authors: Tamura Masazumi , Yuasa Naoto , Nakagawa Yoshinao , Tomishige Keiichi
Published: February 2017

Modification of Ru/SiO2 with metal oxides (MoOx, WOx, and ReOx) improved the activity and selectivity in the hydrogenation of 3-nitrostyrene to 3-aminostyrene under mild conditions such as 0.3 MPa H2, 303 K, and no solvent.
Extremely efficient crystallization of HKUST-1 and Keggin-loaded related phases through the epoxide route
Authors: Oestreicher Víctor , Jobbágy Matías
Published: February 2017

Highly crystalline HKUST-1 and COK-16-like phases were obtained based on a mild in situ alkalinization one-pot epoxide driven method.
A neutral dinuclear Ir(iii) complex for anti-counterfeiting and data encryption
Authors: Jiang Yang , Li Guangfu , Che Weilong , Liu Yingjie , Xu Bin , Shan Guogang , Zhu Dongxia , Su Zhongmin , Bryce Martin R.
Published: February 2017

A neutral dinuclear Ir(iii) Schiff base complexPIBIPhas been synthesized and shown to exhibit both piezochromic luminescence (PCL) and aggregation induced emission (AIE) behaviour.
Tuning the oxidative power of free iron–sulfur clusters
Authors: Lang Sandra M. , Zhou Shaodong , Schwarz Helmut
Published: February 2017

Kinetic measurements in a Fourier-transform ion-cyclotron resonance mass spectrometer reveal the ability of the sulfur-rich Fe2S3+cluster to activate and dehydrogenate small alkenes.
Probing the charge distribution at the electrochemical interface
Authors: Gründer Yvonne , Lucas Christopher A.
Published: February 2017

Resonant surface X-ray diffraction is used to select atoms at the electrochemical interface via the diffraction conditions and obtain spectroscopic information.
(D–π–A)2–π–D–A type ferrocenyl bisthiazole linked triphenylamine based molecular systems for DSSC: synthesis, experimental and theoretical performance studies
Authors: Maragani Ramesh , Misra Rajneesh , Roy M. S. , Singh Manish Kumar , Sharma Ganesh D.
Published: February 2017

We have designed and synthesized ferrocenyl (donor) bisthiazole linked triphenylamine (donor) based (D–π–A)2–π–D–A type dyes D1 and D2 for DSSCs.
Charge carrier mobility in one-dimensional aligned π-stacks of conjugated small molecules with a benzothiadiazole central unit
Authors: Raychev Deyan , Guskova Olga
Published: February 2017

The hopping mobility of charge carriers in organic crystalline materials consisting of benzothiadiazole-cored molecules with thiophene or furan flanks was analyzed using DFT methods.
Tailoring the physical properties of the mixtures of ionic liquids: a microscopic point of view
Authors: Palumbo O. , Trequattrini F. , Navarra M. A. , Brubach J.-B. , Roy P. , Paolone A.
Published: February 2017

The absence of crystalline phases in a large composition range of the mixtures of two ionic liquids is due to the competition between the different conformers of the anion.
Metal oxide decorated layered silicate magadiite for enhanced properties: insight from ZnO and CuO decoration
Authors: Wang Qiushi , Zhang Yifu , Zheng Jiqi , Wang Yu , Hu Tao , Meng Changgong
Published: February 2017

A facile precipitation method was successfully developed to synthesize CuO/ZnO decorated magadiite. The decorated CuO/ZnO exhibited unique optical and magnetic properties and this work provides a new method to prepare well dispersed state of metal oxides.
Photocatalytic nanomaterials for solar-driven bacterial inactivation: recent progress and challenges
Authors: Wang Wanjun , Li Guiying , Xia Dehua , An Taicheng , Zhao Huijun , Wong Po Keung
Published: February 2017

Nanostructured photocatalysts have attracted ever-growing research attention in the application of solar energy for water disinfection.
Investigation of the reaction of ozone with isoprene, methacrolein and methyl vinyl ketone using the HELIOS chamber
Authors: Ren Yangang , Grosselin Benoit , Daële Véronique , Mellouki Abdelwahid
Published: February 2017

The rate constants for the ozonolysis of isoprene (ISO), methacrolein (MACR) and methyl vinyl ketone (MVK) have been measured using the newly built large volume atmospheric simulation chamber at CNRS-Orleans (France), HELIOS (Chambre de simulation atmosphérique à irradiation naturelle d’Orléans). The OH radical yields from the ozonolysis of isoprene, MACR and MVK have also been determined, as well as the gas phase stable products and their yields. The secondary organic aerosol yield for the ozonolysis of isoprene has been tentatively measured in the presence and absence of an OH radical scavenger. The measurements were performed under different experimental conditions with and without adding cyclohexane (cHX) as an OH radical scavenger. All experiments have been conducted at 760 torr of purified dry air (RH < 1%) and ambient temperature (T = 281–295 K). The data obtained are discussed and compared with those from the literature. The use of the HELIOS facility and its associated analytical equipment enables the derivation of kinetic parameters as well as mechanistic information under near realistic atmospheric conditions.
A liquid thermal gradient refractive index lens and using it to trap single living cell in flowing environments
Authors: Liu H. L. , Shi Y. , Liang L. , Li L. , Guo S. S. , Yin L. , Yang Y.
Published: February 2017

Liquid thermal gradient refractive index lens and using it to trapping single living cell in flowing environments.
Enzymatic cascades for the stereo-complementary epimerisation of in situ generated epoxy alcohols
Authors: Liu Yu-Chang , Guo Chao , Liu Yan , Wang Hai-Bo , Wu Zhong-Liu
Published: February 2017

Styrene monooxygenase and each of the two sets of alcohol dehydrogenases work in a tandem concurrent manner for the production of chiral epoxy alcohols using whole-cell catalysts.
Assembly of four 8-quinolinate-based multinuclear complexes: the effect of substituents on core structures and photoluminescence properties
Authors: Yuan Guozan , Zhang Qi , Wang Zhiping , Song Kai , Yuan Xiaomei , Wang Yangzhi , Zhang Liyan
Published: February 2017

Four multinuclear complexes with different core structures are synthesized. The core structures and photoluminescence properties of M(ii)–quinolinate complexes are controlled by the different substituent groups of ligands.
Palladium-catalyzed β-selective C(sp2)–H carboxamidation of enamides by isocyanide insertion: synthesis of N-acyl enamine amides
Authors: Xiong Zhuang , Liang Dongdong , Luo Shuang
Published: February 2017

An efficient synthesis of N-acyl enamine amides via palladium-catalyzed alkene C–H activation and isocyanide insertion has been developed.
Micrometre-length continuous single-crystalline nm-thin Fe3C-nanowires with unusual 010 preferred orientation inside radial few-wall carbon nanotube structures: the key role of sulfur in viscous boundary layer CVS of ferrocene
Authors: Boi Filippo S. , Wang Jiayu , Ivaturi Sameera , Zhang Xi , Wang Shanling , Wen Jiqiu , He Yi , Xiang Gang
Published: February 2017

We report the observation of novel radial carbon nanotube structures with 2–5 walls filled with continuous single-crystalline Fe3C nanowires.
The interaction of CO molecules on Au–Rh bimetallic nanoclusters supported on a thin film of Al2O3/NiAl(100)
Authors: Lee Hsuan , Liao Zhen-He , Hsu Po-Wei , Hung Ting-Chieh , Wu Yu-Cheng , Lin Yuwei , Wang Jeng-Han , Luo Meng-Fan
Published: February 2017

The varied infrared absorption intensity of CO on bimetallic clusters reflects altered electronic states of CO-binding surface atoms.
Synthesis of stable cationic waterborne polyurethane with a high solid content: insight from simulation to experiment
Authors: Li Meng , Liu Fen , Li Yu , Qiang Xihuai
Published: February 2017

We combined micro-simulation and macro-experiments to explore the structure–morphological–property relations of cationic waterborne polyurethanes with a high solid content.
N-Propargylic β-enaminocarbonyls: powerful and versatile building blocks in organic synthesis
Authors: Arshadi Sattar , Vessally Esmail , Edjlali Ladan , Ghorbani-Kalhor Ebrahim , Hosseinzadeh-Khanmiri Rahim
Published: February 2017

Nitrogen-containing heterocyclic compounds are not only prevalent in an extensive number of natural products and synthetic pharmaceuticals but are also used as building blocks in organic synthesis.
Reaction discovery using acetylene gas as the chemical feedstock accelerated by the “stop-flow” micro-tubing reactor system
Authors: Xue Fei , Deng Hongping , Xue Chengwen , Mohamed Dara Khairunnisa Binte , Tang Karen Yuanting , Wu Jie
Published: February 2017

A “stop-flow” micro-tubing reactor system was designed for accelerating reaction discovery using flammable acetylene gas as the feedstock.
Silicon heterojunction solar cells with effectively transparent front contacts
Authors: Saive Rebecca , Boccard Mathieu , Saenz Theresa , Yalamanchili Sisir , Bukowsky Colton R. , Jahelka Phillip , Yu Zhengshan J. , Shi Jianwei , Holman Zachary , Atwater Harry A.
Published: February 2017

Enhanced current density and efficiency through microscale triangular cross-section effectively transparent contacts (ETCs).
Advanced charged porous membranes with flexible internal crosslinking structures for vanadium flow batteries
Authors: Yuyue Zhao Yuyue Zhao , Lu Wenjing , Yuan Zhizhang , Qiao Lin , Li Xianfeng , Zhang Huamin
Published: February 2017

Advanced charged porous membranes with flexible internal crosslinking networks were designed and fabricated for vanadium flow battery application.
High-performance LiTi2(PO4)3 anodes for high-areal-capacity flexible aqueous lithium-ion batteries
Authors: Weng Guo-Ming , Simon Tam Long-Yin , Lu Yi-Chun
Published: February 2017

Efficient high-areal-capacity flexible aqueous lithium-ion batteries based on nitrogen-doped carbon-coated LiTi2(PO4)3.
Peptides for tumor-specific drug targeting: state of the art and beyond
Authors: Roveri Maurizio , Bernasconi Michele , Leroux Jean-Christophe , Luciani Paola
Published: February 2017

This review outlines the most recent advances in peptide-mediated tumor-targeting and gives insight into the direction of the field.
High-efficiency organic light-emitting diodes of phosphorescent PtAg2heterotrinuclear acetylide complexes supported by triphosphine
Authors: Li Yi-Peng , Fan Xin-Xia , Wu Yue , Zeng Xian-Chong , Wang Jin-Yun , Wei Qiao-Hua , Chen Zhong-Ning
Published: February 2017

Platinum(ii)–silver(i) heterometallic cluster complexes are used as a new type of phosphorescent dopant to achieve high-efficiency OLEDs with 67.4 cd A−1peak current efficiency (CE) and 17.4% external quantum efficiency (EQE).
Whole-rainbow-color organic solid fluorophores from subtle modification of thiazolo[5,4-b]thieno[3,2-e]pyridines (TTPs)
Authors: Huang Manna , Ye Shuxian , Xu Ke , Zhou Jie , Liu Junliang , Zhu Xinhai , Wan Yiqian
Published: February 2017

A novel whole-rainbow-color (403 ≤ λmax ≤ 655 nm) organic solid fluorophore system was designed and synthesised.
Correction: A fluorescent dithiadiazolyl radical: structure and optical properties of phenanthrenyl dithiadiazolyl in solution and polymer composites
Authors: Beldjoudi Yassine , Osorio-Román Igor , Nascimento Mitchell A. , Rawson Jeremy M.
Published: February 2017

Correction for ‘A fluorescent dithiadiazolyl radical: structure and optical properties of phenanthrenyl dithiadiazolyl in solution and polymer composites’ by Yassine Beldjoudi et al., J. Mater. Chem. C, 2017, DOI: 10.1039/c6tc05576a.
Prosody and Spoken Word Recognition in Early and Late Spanish–English Bilingual Individuals
Authors: Boutsen Frank R. , Dvorak Justin D. , Deweber Derick D.
Published: February 2017

Purpose

This study was conducted to compare the influence of word properties on gated single-word recognition in monolingual and bilingual individuals under conditions of native and nonnative accent and to determine whether word-form prosody facilitates recognition in bilingual individuals.

Method

Word recognition was assessed in monolingual and bilingual participants when English words were presented with English and Spanish accents in 3 gating conditions: onset only, onset plus prosody/word length only, and onset plus prosody. Word properties were quantified to assess their influence on word recognition in the onset-only condition.

Results

Word recognition speed was proportional to language experience. In the onset-only condition, only word frequency facilitated word recognition across groups. Addition of duration information or prosodic word form did not facilitate word recognition in bilingual individuals the way it did in monolingual individuals. For the bilingual groups, Spanish accent significantly facilitated recognition in the presence of prosodic information. Word attributes were far more consequential in the English accent than in the Spanish accent condition.

Conclusions

Word rhyme information, word properties, and accent affect gated word recognition differently in monolingual and bilingual individuals. Top-down strategies emanating from word properties that may facilitate single-word recognition are experience and context dependent and become less available in the presence of a nonnative accent.
Sensitivity to Morphosyntactic Information in 3-Year-Old Children With Typical Language Development: A Feasibility Study
Authors: Deevy Patricia , Leonard Laurence B. , Marchman Virginia A.
Published: February 2017

Purpose

This study tested the feasibility of a method designed to assess children's sensitivity to tense/agreement information in fronted auxiliaries during online comprehension of questions (e.g.,Are the nice little dogs running?). We expected that a group of children who were proficient in auxiliary use would show this sensitivity, indicating an awareness of the relation between the subject–verb sequence (e.g.,dogs running) and preceding information (e.g.,are). Failure to grasp this relation is proposed to play a role in the protracted inconsistency in auxiliary use in children with specific language impairment (SLI).

Method

Fifteen 3-year-old typically developing children who demonstrated proficiency in auxiliary use viewed pairs of pictures showing a single agent and multiple agents while hearing questions with or without an agreeing fronted auxiliary. Proportion looking to the target was measured.

Results

Children showed anticipatory looking on the basis of the number information contained in the auxiliary (isorare).

Conclusions

The children tested in this study represent a group that frequently serves as a comparison for older children with SLI. Because the method successfully demonstrated their sensitivity to tense/agreement information in questions, future research that involves direct comparisons of these 2 groups is warranted.
Bridging the Divide With SoTL: Connecting Knowledge With Best Practice in Communication Disorders
Authors: Dalton Jennifer C. , Klein Joseph , Botts Dawn C.
Published: February 2017

In this article, a model of evidence-based practice is presented that engaged graduate students and instructors from the discipline of communication sciences and disorders (CSD) in evidence-based education through the use of the scholarship of teaching and learning (SoTL). This article can serve as a starting point for other instructors interested in engaging in SoTL in their own CSD classrooms.
Baade’s window and APOGEE
Authors: Schultheis M. , Rojas-Arriagada A. , García Pérez A. E. , Jönsson H. , Hayden M. , Nandakumar G. , Cunha K. , Allende Prieto C. , Holtzman J. A. , Beers T. C. , Bizyaev D. , Brinkmann J. , Carrera R. , Cohen R. E. , Geisler D. , Hearty F. R. , Fernandez-Tricado J. G. , Maraston C. , Minnitti D. , Nitschelm C. , Roman-Lopes A. , Schneider D. P. , Tang B. , Villanova S. , Zasowski G. , Majewski S. R.
Published: February 2017

Context. Baade’s window (BW) is one of the most observed Galactic bulge fields in terms of chemical abundances. Owing to its low and homogeneous interstellar absorption it is considered the perfect calibration field for Galactic bulge studies.

Aims. In the era of large spectroscopic surveys, calibration fields such as BW are necessary for cross calibrating the stellar parameters and individual abundances of the APOGEE survey.

Methods. We use the APOGEE BW stars to derive the metallicity distribution function (MDF) and individual abundances for α- and iron-peak elements of the APOGEE ASPCAP pipeline (DR13), as well as the age distribution for stars in BW.

Results. We determine the MDF of APOGEE stars in BW and find a remarkable agreement with that of the Gaia-ESO survey (GES). Both exhibit a clear bimodal distribution. We also find that the Mg-metallicity planes of the two surveys agree well, except for the metal-rich part ([Fe/H] > 0.1), where APOGEE finds systematically higher Mg abundances with respect to the GES. The ages based on the [C/N] ratio reveal a bimodal age distribution, with a major old population at ~ 10 Gyr, with a decreasing tail towards younger stars. A comparison of stellar parameters determined by APOGEE and those determined by other sources reveals detectable systematic offsets, in particular for spectroscopic surface gravity estimates. In general, we find a good agreement between individual abundances of O, Na, Mg, Al, Si, K, Ca, Cr, Mn, Co, and Ni from APOGEE with that of literature values.

Conclusions. We have shown that in general APOGEE data show a good agreement in terms of MDF and individual chemical abundances with respect to literature works. Using the [C/N] ratio we found a significant fraction of young stars in BW.
Perspectives: Nanofibers and nanowires for disordered photonics
Authors: Pisignano Dario , Persano Luana , Camposeo Andrea
Published: February 2017

As building blocks of microscopically non-homogeneous materials, semiconductor nanowires and polymer nanofibers are emerging component materials for disordered photonics, with unique properties of light emission and scattering. Effects found in assemblies of nanowires and nanofibers include broadband reflection, significant localization of light, strong and collective multiple scattering, enhanced absorption of incident photons, synergistic effects with plasmonic particles, and random lasing. We highlight recent related discoveries, with a focus on material aspects. The control of spatial correlations in complex assemblies during deposition, the coupling of modes with efficient transmission channels provided by nanofiber waveguides, and the embedment of random architectures into individually coded nanowires will allow the potential of these photonic materials to be fully exploited, unconventional physics to be highlighted, and next-generation optical devices to be achieved. The prospects opened by this technology include enhanced random lasing and mode-locking, multi-directionally guided coupling to sensors and receivers, and low-cost encrypting miniatures for encoders and labels.
Spectral densities for Frenkel exciton dynamics in molecular crystals: A TD-DFTB approach
Authors: Plötz Per-Arno , Megow Jörg , Niehaus Thomas , Kühn Oliver
Published: February 2017

Effects of thermal fluctuations on the electronic excitation energies and intermonomeric Coulomb couplings are investigated for a perylene-tetracarboxylic-diimide crystal. To this end, time dependent density functional theory based tight binding (TD-DFTB) in the linear response formulation is used in combination with electronic ground state classical molecular dynamics. As a result, a parametrized Frenkel exciton Hamiltonian is obtained, with the effect of exciton-vibrational coupling being described by spectral densities. Employing dynamically defined normal modes, these spectral densities are analyzed in great detail, thus providing insight into the effect of specific intramolecular motions on excitation energies and Coulomb couplings. This distinguishes the present method from approaches using fixed transition densities. The efficiency by which intramolecular contributions to the spectral density can be calculated is a clear advantage of this method as compared with standard TD-DFT.
Note: Improved heater design for high-temperature hollow cathodes
Authors: McDonald M. S. , Gallimore A. D. , Goebel D. M.
Published: February 2017

We present an improved heater design for thermionic cathodes using a rhenium filament encased in a boron nitride ceramic sleeve. This heater is relatively simple to fabricate, yet has been successfully used to reliably and repeatably light a lanthanum hexaboride (LaB6) hollow cathode based on a previously published design without noticeable filament degradation over hundreds of hours of operation. The high decomposition temperature of boron nitride (2800 C for inert environments) and melting point for rhenium (3180 C) make this heater especially attractive for use with LaB6, which may require operating temperatures upwards of 1700 C. While boron nitride decomposes in air above 1000 C, the heater was used only at vacuum with an inert gas discharge, and no degradation was observed. Limitations of current state of the art cathode heaters are also discussed and compared with the rhenium-boron nitride combination.
High-pressure hydrogen sulfide by diffusion quantum Monte Carlo
Authors: Azadi Sam , Kühne Thomas D.
Published: February 2017

We revisit the enthalpy-pressure phase diagram of the various products from the different proposed decompositions of H2S at pressures above 150 GPa by means of accurate diffusion Monte Carlo simulations. Our results entail a revision of the ground-state enthalpy-pressure phase diagram. Specifically, we find that the C2/c HS2 structure is persistent up to 440 GPa before undergoing a phase transition into the C2/m phase. Contrary to density functional theory, our calculations suggest that the C2/m phase of HS is more stable than the I41/amd HS structure over the whole pressure range from 150 to 400 GPa. More importantly, we predict that the Im-3m phase is the most likely candidate for H3S, which is consistent with recent experimental x-ray diffraction measurements.
Unsteady fluid flow in a slightly curved annular pipe: The impact of the annulus on the flow physics
Authors: Messaris Gerasimos A. T. , Karahalios George T.
Published: February 2017

The motivation of the present study is threefold. Mainly, the etiological explanation of the Womersley number based on physical reasoning. Next, the extension of a previous work [Messaris, Hadjinicolaou, and Karahalios, “Unsteady fluid flow in a slightly curved pipe: A comparative study of a matched asymptotic expansions solution with a single analytical solution,” Phys. Fluids 28, 081901 (2016)] to the annular pipe flow. Finally, the discussion of the effect of the additional stresses generated by a catheter in an artery and exerted on the arterial wall during an in vivo catheterization. As it is known, the square of the Womersley number may be interpreted as an oscillatory Reynolds number which equals to the ratio of the inertial to the viscous forces. The adoption of a modified Womersley number in terms of the annular gap width seems therefore more appropriate to the description of the annular flow than an ordinary Womersley number defined in terms of the pipe radius. On this ground, the non-dimensional equations of motion are approximately solved by two analytical methods: a matched asymptotic expansions method and a single. In the first method, which is valid for very large values of the Womersley number, the flow region consists of the main core and the two boundary layers formed at the inner and outer boundaries. In the second, the fluid is considered as one region and the Womersley number can vary from finite values, such that they fit to the blood flow in the aorta and the main arteries, to infinity. The single solution predicts increasing circumferential and decreasing axial stresses with increasing catheter radius at a prescribed value of the Womersley parameter in agreement with analogous results from other theoretical and numerical solutions. It also predicts the formation of pinches on the secondary flow streamlines and a third boundary layer, additional to those formed at the boundary walls. Finally, we show that the insertion of a catheter in an artery may trigger possible disastrous side effects. It may cause unexpected damage to a predisposed but still dormant location of the arterial wall due to high additional radial pressure that induces an excessive distension of the artery.