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hybrid room

Hari Babu Vasili, Matheus Gamino, Jaume Gazquez, Florencio Sanchez, Manuel Valvidares, Pierluigi Gargiani, Eric Pellegrin, Josep Fontcuberta
Pure spin currents hold promises for an energy-friendlier spintronics. They can be generated by a flow of charge along a non-magnetic metal having a large spin-orbit coupling. It produces a spin accumulation at its surfaces, controllable by the magnetization of an adjacent ferromagnetic layer. Paramagnetic metals typically used are close to a ferromagnetic instability and thus magnetic proximity effects can contribute to the observed angular-dependent magnetoresistance (ADMR). As interface phenomena govern the spin conductance across the metal/ferromagnetic-insulator heterostructures, unraveling these distinct contributions is pivotal to full understanding of spin current conductance...
March 16, 2018: ACS Applied Materials & Interfaces
Hiroki Yokoi, Satoru Hiroto, Hiroshi Shinokubo
The reversible formation of σ-bonds between organic radicals has been widely investigated. However, reports on the formation of σ-dimers from delocalized π-radical cations are scarce. Herein, we report the reversible σ-dimerization behavior of a bowl-shaped π-radical cation generated from a nitrogen-embedded buckybowl, both in the crystalline state and in solution. The detailed structure of the σ-dimer in the crystalline state was determined by a single-crystal X-ray diffraction analysis. The monomeric radical cation exists predominantly in solution at room temperature, while dimerization of the radical cations occurs through carbon-carbon σ-bond formation upon reducing the temperature...
March 15, 2018: Journal of the American Chemical Society
Jing Zhang, Xitao Liu, Xianfeng Li, Shiguo Han, Kewen Tao, Yuyin Wang, Chengmin Ji, Zhihua Sun, Junhua Luo
Organic-inorganic hybrid perovskites, with the formula ABX3 (A=organic cation, B=metal cation, and X=halide; for example, CH3 NH3 PbI3 ), have diverse and intriguing physical properties, such as semiconduction, phase transitions, and optical properties. Herein, a new ABX3 -type semiconducting perovskite-like hybrid, (hexamethyleneimine)PbBr3 (1), consisting of one-dimensional inorganic frameworks and cyclic organic cations, is reported. Notably, the inorganic moiety of 1 adopts a perovskite-like architecture and forms infinite columns composed of face-sharing PbBr6 octahedra...
March 15, 2018: Chemistry, An Asian Journal
Pei-Yu Guo, Cai Sun, Ning-Ning Zhang, Li-Zhen Cai, Ming-Sheng Wang, Guo-Cong Guo
A photochromic compound with fast response to Mo-Kα (4 min) and Al-Kα (1 s) X-rays was synthesized using a cluster of high-Z atoms and a flexible viologen zwitterion. The coloration time of 1 s when exposed to soft X-rays is the recorded minimum for X-ray-induced photochromic materials, indicating a potential to detect low-energy X-rays.
March 15, 2018: Chemical Communications: Chem Comm
Duong Tung Pham, Joseph Paul Baboo, Jinju Song, Sungjin Kim, Jeonggeun Jo, Vinod Mathew, Muhammad Hilmy Alfaruqi, Balaji Sambandam, Jaekook Kim
Pyrite (FeS2 ) is a promising electrode material for lithium ion batteries (LIBs) because of its high natural availability, low toxicity, cost-effectiveness, high theoretical capacity (894 mA h g-1 ) and high theoretical specific energy density (1270 W h kg-1 , 4e- /FeS2 ). Nevertheless, the use of FeS2 in electrochemical capacitors was restricted due to fast capacity fading as a result of polysulfide (S/Sn 2- ) formation during the initial electrochemical cycling. In order to avoid the formation of polysulfides, we employed the strategy of utilizing an ether based electrolyte (1...
March 15, 2018: Nanoscale
Giulio Illuminati, Giulia Pizzardi, Rocco Pasqua, Francesca Frezzotti, Piergaspare Palumbo, Francesco Macrina, Francesco Calio
BACKGROUND: Tandem stenoses of the internal carotid artery (ICA) and proximal, ipsilateral common carotid artery (CCA) or innominate artery can be treated with a hybrid approach, combining conventional carotid endarterectomy (CEA) and retrograde stenting of the proximal stenosis, through surgical exposure of the carotid bifurcation. The purpose of this study was to evaluate the results of combining eversion CEA with retrograde CCA/innominate artery stenting. MATERIAL AND METHODS: From January 2015 to July 2017, 7 patients, 6 men of a mean age of 72 years (range 59-83 years) underwent simultaneous, retrograde stenting of the proximal CCA/innominate artery and an eversion CEA of the ipsilateral ICA, through surgical exposure of the carotid bifurcation, for severe tandem stenoses...
March 10, 2018: International Journal of Surgery
Badrinath Jagannath, Sriram Muthukumar, Shalini Prasad
We have investigated the role of kosmotropic anionic moieties and chaotropic cationic moieties of room temperature hydrophilic ionic liquids in enhancing the biosensing performance of affinity based immunochemical biosensors in human sweat. Two ionic liquids, 1-butyl-3-methylimidazolium tetrafluoroborate (BMIM[BF4 ]) and choline dihydrogen phosphate (Choline[DHP]) were investigated in this study with Choline[DHP] being more kosmotropic in nature having a more protein stabilizing effect based on the hofmeister series...
August 3, 2018: Analytica Chimica Acta
Konrad Skotnicki, Julio Ramón De la Fuente, Alvaro Cañete, Eduardo Berrios, Krzysztof Bobrowski
The absorption-spectral and kinetic behavior of radical ions and neutral hydrogenated radicals of seven 3-styryl-quinoxalin-2(1 H)-one (3-SQ) derivatives, one without substituents in styryl moiety, four others with electron donating (R = -CH3 , -OCH3 , -N(CH3 )2) or electron withdrawing (R = -OCF3 ) substituents in para-position in benzene ring, and remaining two with double methoxy substituents (-OCH3 ), however, at different position (meta/para and ortho/meta) have been studied by UV-vis spectrophotometric pulse radiolysis in a neat acetonitrile saturated with argon (Ar) and oxygen (O2 ) and in 2-propanol saturated with Ar, at room temperature...
March 13, 2018: Journal of Physical Chemistry. B
Betul Sen, Aysun Şavk, Fatih Sen
Dimethylamine borane (DMAB) has been considered as one of the important hydrogen sources with a simple process by the help of the efficient catalyst. For this purpose, herein, platinum nanoparticles (Pt NPs), placed inside carbon black hybrid (Pt NPs@CBH), activated carbon (Pt NPs@AC) and Vulcan carbon (Pt NPs@VC), have been prepared as highly monodisperse catalysts for dehydrogenation reactions of DMAB at room temperature. The morphological and physical structure of the monodisperse catalysts have been identified by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) etc...
March 3, 2018: Journal of Colloid and Interface Science
Wael Ahmad, Youssra Obeidi, Payman Majd, Jan Sigge Brunkwall
OBJECTIVE: This study aimed to evaluate the accuracy, as well as the effectiveness of 2D-3D registration method of image fusion technology (IF) in endovascular aortic surgery (EVAR). METHODS: We performed a review of our institutional endovascular aortic database of patients who had undergone EVAR between 2011 and 2015 before and after the installation of a 3D image fusion CT system in our hybrid operating room. RESULTS: The accuracy was assessed in 14 endovascular procedures and showed a median registration error of 1...
March 6, 2018: Annals of Vascular Surgery
Rouzbeh Shahsavari, Shuo Zhao
Hydrogen is an ideal synthetic fuel because it is lightweight, abundant and its oxidation product (water) is environmentally benign. However, its utilization is impeded by the lack of an efficient storage device. A new building block approach is proposed for an exhaustive search of optimal hydrogen uptakes in a series of low density boron nitride (BN) nanoarchitectures via extensive 3868 ab initio-based multiscale simulations. By probing various geometries, temperatures, pressures, and doping ratios, these results demonstrate a maximum uptake of 8...
March 8, 2018: Small
Haihua Zhang, Qing Liao, Yishi Wu, Zhaoyi Zhang, Qinggang Gao, Peng Liu, Meili Li, Jiannian Yao, Hongbing Fu
3D organic-inorganic hybrid perovskites have featured high gain coefficients through the electron-hole plasma stimulated emission mechanism, while their 2D counterparts of Ruddlesden-Popper perovskites (RPPs) exhibit strongly bound electron-hole pairs (excitons) at room temperature. High-performance solar cells and light-emitting diodes (LEDs) are reported based on 2D RPPs, whereas light-amplification devices remain largely unexplored. Here, it is demonstrated that ultrafast energy transfer along cascade quantum well (QW) structures in 2D RPPs concentrates photogenerated carriers on the lowest-bandgap QW state, at which population inversion can be readily established enabling room-temperature amplified spontaneous emission and lasing...
March 8, 2018: Advanced Materials
Yaxiong Wang, Ping Liu, Baoqing Zeng, Liming Liu, Jianjun Yang
A hydrothermal method for synthesizing ultralong and thin copper nanowires (CuNWs) with average diameter of 35 nm and average length of 100 μm is demonstrated in this paper. The concerning raw materials include copric (II) chloride dihydrate (CuCl2 ·2H2 O), octadecylamine (ODA), and ascorbic acid, which are all very cheap and nontoxic. The effect of different reaction time and different molar ratios to the reaction products were researched. The CuNWs prepared by the hydrothermal method were applied to fabricate CuNW transparent conductive electrode (TCE), which exhibited excellent conductivity-transmittance performance with low sheet resistance of 26...
March 7, 2018: Nanoscale Research Letters
Georgios Karaolanis, Dimitrios Moris, C Cameron McCoy, Diamantis I Tsilimigras, Sotirios Georgopoulos, Chris Bakoyiannis
The evaluation and management of patients with abdominal vascular trauma or injury requires immediate and effective decision-making in these unfavorable circumstances. The majority of these patients arrive at trauma centers in profound shock, secondary to massive blood loss, which is often unrelenting. Moreover, ischemia, compartment syndrome, thrombosis, and embolization may also be life threatening and require immediate intervention. To minimize the risk of these potentially lethal complications, early understanding of the disease process and emergent therapeutic intervention are necessary...
2018: Frontiers in Surgery
André Guedes, Rita Macedo, Gerardo Jaramillo, Susana Cardoso, Paulo P Freitas, David A Horsley
Advances in the magnetic sensing technology have been driven by the increasing demand for the capability of measuring ultrasensitive magnetic fields. Among other emerging applications, the detection of magnetic fields in the picotesla range is crucial for biomedical applications. In this work Picosense reports a millimeter-scale, low-power hybrid magnetoresistive-piezoelectric magnetometer with subnanotesla sensitivity at low frequency. Through an innovative noise-cancelation mechanism, the 1/f noise in the MR sensors is surpassed by the mechanical modulation of the external magnetic fields in the high frequency regime...
March 6, 2018: Sensors
Alberto García-Fernández, Juan Manuel Bermúdez-García, Socorro Castro-García, Antonio Luis Llamas-Saiz, Ramón Artiaga, Jorge José López-Beceiro, Manuel Sánchez-Andújar, María Antonia Señarís-Rodríguez
We have prepared two new lead halides with the novel general formula of DMA7 Pb4 X15 (DMA = [(CH3 )2 NH2 ]+ and X = Cl- or Br- ) by using an easy route under mild conditions at room temperature. These compounds exhibit an unprecedented crystal structure, are formed by layers of distorted [PbX6 ] octahedra, which share corners and faces, and contain intercalated DMA cations. Very interestingly, they display dielectric transitions, which are related to a partial order-disorder process of the DMA cations between 160 and 260 K...
March 6, 2018: Inorganic Chemistry
Daiki Wada, Yasushi Nakamori, Shuji Kanayama, Shuhei Maruyama, Masahiro Kawada, Hiromu Iwamura, Koichi Hayakawa, Fukuki Saito, Yasuyuki Kuwagata
Computed tomography (CT) embedded in the emergency room has gained importance in the early diagnostic phase of trauma care. In 2011, we implemented a new trauma workflow concept with a sliding CT scanner system with interventional radiology features (IVR-CT) that allows CT examination and emergency therapeutic intervention without relocating the patient, which we call the Hybrid emergency room (Hybrid ER). In the Hybrid ER, all life-saving procedures, CT examination, damage control surgery, and transcatheter arterial embolisation can be performed on the same table...
March 5, 2018: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
Olga Nazarenko, Martin R Kotyrba, Sergii Yakunin, Marcel Aebli, Gabriele Raino, Bogdan M Benin, Michael Wörle, Maksym V Kovalenko
Two-dimensional hybrid organic-inorganic lead halides perovskite-type compounds attracted immense scientific interest due to their remarkable optoelectronic properties and tailorable crystal structures. In this work, we present a new layered hybrid lead halide, namely [CH(NH2)2][C(NH2)3]PbI4, wherein puckered lead-iodide layers are separated by two small and stable organic cations: formamidinium, CH(NH2)2+, and guanidinium, C(NH2)3+. This perovskite is thermally stable up to 255 oC, exhibits room-temperature photoluminescence in the red region with a quantum yield of 3...
March 4, 2018: Journal of the American Chemical Society
L Fidalgo Domingos, E M San Norberto García, D Gutiérrez Castillo, C Flota Ruiz, I Estévez Fernández, C Vaquero Puerta
BACKGROUND: Endovascular procedures come with a potential risk of radiation hazards both to patients and to the vascular staff. Classically, most endovascular interventions took place in regular operating rooms using a fluoroscopy C-arm unit controlled by a third party. Hybrid operating rooms (HOR) provide an optimal surgical suit with all the qualities of a fixed C-arm device, while allowing the device to be controlled by the surgical team. The latest studies suggest that an operator-controlled system may reduce the radiation dose...
February 28, 2018: Annals of Vascular Surgery
Mei-Ling Chen, Zhi-Wen Gao, Xue-Min Chen, Shu-Chao Pang, Yi Zhang
Magnetic graphene-based hybrids are being increasing recognized as an effective nanotheranostic agent in biomedicine. Conventional technologies for their synthesis have drawbacks not only from a synthetic standpoint, mainly requiring high temperatures and multi-step processes, but also from a biological perspective, chemical precursors or surfactants involved in the chemical process are toxic to cells. Herein, we report a novel approach for one-step fabricating magnetic graphene hybrid nanocomposites based on laser irradiation of an Fe target in GO-PEG aqueous solution at room temperature without using any other chemical reagent...
May 15, 2018: Talanta
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