bluuebunny/crossref_metadata_2025_split huggingface dataset:
Self‐Powered Pulse Sensor for Antidiastole of Cardiovascular Disease
Authors: Ouyang Han , Tian Jingjing , Sun Guanglong , Zou Yang , Liu Zhuo , Li Hu , Zhao Luming , Shi Bojing , Fan Yubo , Fan Yifan , Wang Zhong Lin , Li Zhou 
Published: September 2017

AbstractCardiovascular diseases are the leading cause of death globally; fortunately, 90% of cardiovascular diseases are preventable by long‐term monitoring of physiological signals. Stable, ultralow power consumption, and high‐sensitivity sensors are significant for miniaturized wearable physiological signal monitoring systems. Here, this study proposes a flexible self‐powered ultrasensitive pulse sensor (SUPS) based on triboelectric active sensor with excellent output performance (1.52 V), high peak signal‐noise ratio (45 dB), long‐term performance (107 cycles), and low cost price. Attributed to the crucial features of acquiring easy‐processed pulse waveform, which is consistent with second derivative of signal from conventional pulse sensor, SUPS can be integrated with a bluetooth chip to provide accurate, wireless, and real‐time monitoring of pulse signals of cardiovascular system on a smart phone/PC. Antidiastole of coronary heart disease, atrial septal defect, and atrial fibrillation are made, and the arrhythmia (atrial fibrillation) is indicative diagnosed from health, by characteristic exponent analysis of pulse signals accessed from volunteer patients. This SUPS is expected to be applied in self‐powered, wearable intelligent mobile diagnosis of cardiovascular disease in the future.
Ultrasensitive and Fast All‐Inorganic Perovskite‐Based Photodetector via Fast Carrier Diffusion
Authors: Yang Bin , Zhang Fengying , Chen Junsheng , Yang Songqiu , Xia Xusheng , Pullerits Tõnu , Deng Weiqiao , Han Keli 
Published: September 2017

AbstractLow trap‐state density, high carrier mobility, and efficient charge carrier collection are key parameters for photodetectors with high sensitivity and fast response time. This study demonstrates a simple solution growth method to prepare CsPbBr3 microcrystals (MCs) with low trap‐state density. Time‐dependent photoluminescence study with one‐photon excitation (OPE) and two‐photon excitation (TPE) indicates that CsPbBr3 MCs exhibit fast carrier diffusion with carrier mobility over 100 cm2 V−1 S−1. Furthermore, CsPbBr3 MC‐based photodetectors with high charge carriers' collection efficiency are fabricated. Such photodetectors show ultrahigh responsivity (R) up to 6 × 104 A W−1 with OPE and high R up to 6 A W−1 with TPE. The R for OPE is over one order of magnitude higher (the R for TPE is three orders of magnitude higher) than that of previously reported all‐inorganic perovskite‐based photodetectors. Moreover, the photodetectors exhibit fast response time of ≈1 ms, which corresponds to a gain ≈105 and a gain‐ bandwidth product of 108 Hz for OPE (a gain ≈103 and a gain‐bandwidth product of 106 Hz for TPE).
Metal‐Free Annulation Cascades of 1,7‐Enynes Using Di‐tert‐butyl Peroxide as the Methyl Source towards the Synthesis of Polyheterocyclic Scaffolds
Authors: Tan Fang‐Lin , Hu Ming , Song Ren‐Jie , Li Jin‐Heng 
Published: September 2017

AbstractA new metal‐free oxidative cascade methylation/cyclization of benzene‐linked 1,7‐enynes to construct methylated polyheterocyclic scaffold skeletons is described. In this transformation, three new C–C bonds and two new rings are formed. Notably, di‐tert‐butyl peroxide (DTBP) acts not only as a radical initiator but also as an efficient methyl source.magnified image
Probing the Unique Role of Gallium in Amorphous Oxide Semiconductors through Structure–Property Relationships
Authors: Moffitt Stephanie L. , Zhu Qimin , Ma Qing , Falduto Allison F. , Buchholz D. Bruce , Chang Robert P. H. , Mason Thomas O. , Medvedeva Julia E. , Marks Tobin J. , Bedzyk Michael J. 
Published: September 2017

AbstractThis study explores the unique role of Ga in amorphous (a‐) InGaO oxide semiconductors through combined theory and experiment. It reveals substitutional effects that have not previously been attributed to Ga, and that are investigated by examining how Ga influences structure–property relationships in a series of pulsed laser deposited a‐InGaO thin films. Element‐specific structural studies (X‐ray absorption and anomalous scattering) show good agreement with the results of ab initio molecular dynamics simulations. This structural knowledge is used to understand the results of air‐annealing and Hall effect electrical measurements. The crystallization temperature of a‐IO is shown to increase by as much as 325 °C on substituting Ga for In. This increased thermal stability is understood on the basis of the large changes in local structure that Ga undergoes, as compared to In, during crystallization. Hall measurements reveal an initial sharp drop in both carrier concentration and mobility with increasing Ga incorporation, which moderates at >20 at% Ga content. This decline in both the carrier concentration and mobility with increasing Ga is attributed to dilution of the charge‐carrying InO matrix and to increased structural disorder. The latter effect saturates at high at% Ga.
Ferroelectricity Tailored Valley Splitting in Monolayer WTe2/YMnO3 Heterostructures: A Route toward Electrically Controlled Valleytronics
Authors: Song Yan , Wang Xiaocha , Mi Wenbo 
Published: September 2017

AbstractControl of valley degree of freedom in monolayer transition‐metal dichalcogenide (TMDC) has been realized by using optical pumping and magnetic fields. However, an electrical approach is missing and has potential for practical applications. In this paper, valley/ferroelectricity coupling is demonstrated for the first time in a monolayer WTe2/YMnO3 heterostructure. Tunable valley splitting by an electric field is predicted when a valley‐polarized monolayer TMDC is deposited on a multiferroic substrate. The fundamental principle behind this is an intermediate lattice–ferroelectricity coupling. An electric field changes the surface morphology of the substrate, hence the distance, that is, the exchange interaction, between the substrate and monolayer. The resulting tunable valley splitting brings a new component to electrically controlled valleytronics.
Benzylamine‐Treated Wide‐Bandgap Perovskite with High Thermal‐Photostability and Photovoltaic Performance
Authors: Zhou Yang , Wang Feng , Cao Yu , Wang Jian‐Pu , Fang Hong‐Hua , Loi Maria Antonietta , Zhao Ni , Wong Ching‐Ping 
Published: September 2017

AbstractMixed iodide‐bromide organolead perovskites with a bandgap of 1.70–1.80 eV have great potential to boost the efficiency of current silicon solar cells by forming a perovskite‐silicon tandem structure. Yet, the stability of the perovskites under various application conditions, and in particular combined light and heat stress, is not well studied. Here, FA0.15Cs0.85Pb(I0.73Br0.27)3, with an optical bandgap of ≈1.72 eV, is used as a model system to investigate the thermal‐photostability of wide‐bandgap mixed halide perovskites. It is found that the concerted effect of heat and light can induce both phase segregation and decomposition in a pristine perovskite film. On the other hand, through a postdeposition film treatment with benzylamine (BA) molecules, the highly defective regions (e.g., film surface and grain boundaries) of the film can be well passivated, thus preventing the progression of decomposition or phase segregation in the film. Besides the stability improvement, the BA‐modified perovskite solar cells also exhibit excellent photovoltaic performance, with the champion device reaching a power conversion efficiency of 18.1%, a stabilized power output efficiency of 17.1% and an open‐circuit voltage (V
oc) of 1.24 V.
Popcorn Inspired Porous Macrocellular Carbon: Rapid Puffing Fabrication from Rice and Its Applications in Lithium–Sulfur Batteries
Authors: Zhong Yu , Xia Xinhui , Deng Shengjue , Zhan Jiye , Fang Ruyi , Xia Yang , Wang Xiuli , Zhang Qiang , Tu Jiangping 
Published: September 2017

AbstractThe advancement of electrochemical energy storage is closely bound up with the breakthrough of controllable fabrication of energy materials. Inspired by a popcorn fabrication from corn raw, herein a unique porous macrocellular carbon composed of cross‐linked nano/microsheets by a powerful puffing of rice precursor is described. The rice is directly puffed with a volume enlargement of ≈20 times when it is instantaneously released from a sealed environment with a high pressure of 1.0 MPa at 200 °C. Interestingly, when metal (e.g., Ni) nanoparticles are embedded in the puffed rice derived carbon (PRC), high‐quality PRC/metal composites are achieved with attractive properties of a high electrical conductivity of ≈7.2 × 104 S m−1, a large porosity of 85.1%, and a surface area of 1492.2 m2 g−1. The PRC/Ni are employed as a host in lithium–sulfur batteries. The designed PRC/Ni/S electrode exhibits a high reversible capacity of 1257.2 mA h g−1 at 0.2 C, a prolonged cycle life (821 mA h g−1 after 500 cycles), and enhanced rate capability, much better than other counterparts (PRC/S and rGO/S). The excellent properties are attributed to the advantages of PRC/Ni network with a high electrical conductivity, strong adsorption/blocking ability for polysulfides, and interconnected porous framework.
Graphene‐Based Electron Transport Layers in Perovskite Solar Cells: A Step‐Up for an Efficient Carrier Collection
Authors: Biccari Francesco , Gabelloni Fabio , Burzi Erica , Gurioli Massimo , Pescetelli Sara , Agresti Antonio , Del Rio Castillo Antonio Esaú , Ansaldo Alberto , Kymakis Emmanuel , Bonaccorso Francesco , Di Carlo Aldo , Vinattieri Anna 
Published: September 2017

AbstractThe electron transport layer (ETL) plays a fundamental role in perovskite solar cells. Recently, graphene‐based ETLs have been proved to be good candidate for scalable fabrication processes and to achieve higher carrier injection with respect to most commonly used ETLs. Here, the effects of different graphene‐based ETLs in sensitized methylammonium lead iodide (MAPI) solar cells are experimentally studied. By means of time‐integrated and picosecond time‐resolved photoluminescence techniques, the carrier recombination dynamics in MAPI films embedded in different ETLs is investigated. Using graphene doped mesoporous TiO2 (G+mTiO2) with the addition of a lithium‐neutralized graphene oxide (GO‐Li) interlayer as ETL, it is found find that the carrier collection efficiency is increased by about a factor two with respect to standard mTiO2. Taking advantage of the absorption coefficient dispersion, the MAPI layer morphology is probed, along the thickness, finding that the MAPI embedded in the ETL composed by G+mTiO2 plus GO‐Li brings to a very good crystalline quality of the MAPI layer with a trap density about one order of magnitude lower than that found with the other ETLs. In addition, this ETL freezes MAPI at the tetragonal phase, regardless of the temperature. Graphene‐based ETLs can open the way to significant improvement of perovskite solar cells.
Flexible Composite Solid Electrolyte Facilitating Highly Stable “Soft Contacting” Li–Electrolyte Interface for Solid State Lithium‐Ion Batteries
Authors: Yang Luyi , Wang Zijian , Feng Yancong , Tan Rui , Zuo Yunxing , Gao Rongtan , Zhao Yan , Han Lei , Wang Ziqi , Pan Feng 
Published: September 2017

AbstractA flexible composite solid electrolyte membrane consisting of inorganic solid particles (Li1.3Al0.3Ti1.7(PO4)3), polyethylene oxide (PEO), and boronized polyethylene glycol (BPEG) is prepared and investigated. This membrane exhibits good stability against lithium dendrite, which can be attributed to its well‐designed combination components: the compact inorganic lithium ion conducting layer provides the membrane with good mechanical strength and physically barricades the free growth of lithium dendrite; while the addition of planar BPEG oligomers not only disorganizes the crystallinity of the PEO domain, leading to good ionic conductivity, but also facilitates a “soft contact” between interfaces, which not only chemically enables homogeneous lithium plating/stripping on the lithium metal anode, but also reduces the polarization effects. In addition, by employing this membrane to a LiFePO4/Li cell and testing its galvanostatic cycling performances at 60 °C, capacities of 158.2 and 94.2 mA h g−1 are delivered at 0.1 C and 2 C, respectively.
Enhancing the Photovoltaic Performance via Vertical Phase Distribution Optimization in Small Molecule:PC71BM Blends
Authors: Zhang Yajie , Deng Dan , Wang Zaiyu , Wang Yuheng , Zhang Jianqi , Fang Jin , Yang Yang , Lu Guanghao , Ma Wei , Wei Zhixiang 
Published: September 2017

AbstractBulk heterojunction (BHJ) morphologies are vital to the device performance of organic solar cells (OSCs), including phase separation in lateral and vertical directions. However, the morphology developed from the blend solution is not easily predicted and controlled, especially in the vertical direction, because the BHJ morphology is kinetically frozen during the rapid solvent evaporation process. Here, a simple approach to control BHJ morphologies with optimized phase distribution for small molecule:[6,6]‐phenyl‐C71‐butyric acid methyl ester (PC71 BM) blends by enhancing the substrate temperature during the spin‐coating process. Three molecules with various fluorine atoms in the end acceptor units are selected. The relationship among molecular structures, substrate temperature effects on the morphology, and device performances are symmetrically investigated. Low temperature induces a multiple‐sublayer‐like architecture with significantly varied distributions of composition, morphology, and localized state energy, while high processing temperature induces more uniform film. The short‐circuit current, open‐circuit voltage, and fill factor of the devices are tuned with synergic improvement of efficiency toward over 10% and 11% for conventional and inverted devices. This work reveals the origination of vertical phase segregation, and provides a facile strategy to optimize the hierarchical phase separation for enhancing the performance of OSCs.
Unity Convoluted Design of Solid Li‐Ion Battery and Triboelectric Nanogenerator for Self‐Powered Wearable Electronics
Authors: Liu Xi , Zhao Kun , Wang Zhong Lin , Yang Ya 
Published: September 2017

AbstractWearable electronics suffer from severe power shortage due to limited working time of Li‐ion batteries, and there is a desperate need to build a hybrid device including energy scavenging and storing units. However, previous attempts to integrate the two units are mainly based on simple external connections and assembly, so that maintaining small volume and low manufacturing cost becomes increasingly challenging. Here a convoluted power device is presented by hybridizing internally a solid Li‐ion battery (SLB) and a triboelectric nanogenerator (TENG), so that the two units are one inseparable entity. The fabricated device acts as a TENG that can deliver a peak output power of 7.4 mW under a loading resistance of 7 MΩ, while the device also acts as an SLB to store the obtained electric energy. The device can be mounted on a human shoe to sustainably operate a green light‐emitting diode, thus demonstrating potential for self‐powered wearable electronics.
Multipotente Liganden mit kombinierter Cholinesterase‐ und Monoaminooxidase‐Inhibition sowie Histamin‐H3R‐Antagonismus bei neurodegenerativen Erkrankungen
Authors: Bautista‐Aguilera Óscar M. , Hagenow Stefanie , Palomino‐Antolin Alejandra , Farré‐Alins Víctor , Ismaili Lhassane , Joffrin Pierre‐Louis , Jimeno María L. , Soukup Ondřej , Janočková Jana , Kalinowsky Lena , Proschak Ewgenij , Iriepa Isabel , Moraleda Ignacio , Schwed Johannes S. , Romero Martínez Alejandro , López‐Muñoz Francisco , Chioua Mourad , Egea Javier , Ramsay Rona R. , Marco‐Contelles José , Stark Holger 
Published: September 2017

AbstractDie Therapie von komplexen neurodegenerativen Erkrankungen erfordert eine Entwicklung von Multitarget‐orientierten Wirkstoffen. Durch strukturelle Optimierung des neuroprotektiven Liganden ASS234 mittels Integration etablierter Pharmakophore des Histamin‐H3‐Rezeptors (H3R) konnten neuartige Indolderivate mit inhibitorischer Aktivität an Acetylcholin‐/Butyrylcholinesterasen und Monoaminooxidasen A und B sowie am H3R erzielt werden. Diese zeigten ein ausbalanciertes Wirkprofil an den gewünschten Targets in zumeist nanomolaren Konzentrationsbereichen. Weiterführende In‐vitro‐Untersuchungen zeigten antioxidative und neuroprotektive Fähigkeiten sowie die Überwindung der Blut‐Hirn‐Schranke. Mit diesem vielversprechenden Wirkprofil zeigte Contilisant (bei 1 mg kg−1 i.p.) eine signifikante Verbesserung von Lipopolysaccharid‐induzierten kognitiven Defiziten.
Enantioselective Total Synthesis of (−)‐Deoxoapodine
Authors: Kang Taek , White Kolby L. , Mann Tyler J. , Hoveyda Amir H. , Movassaghi Mohammad 
Published: September 2017

AbstractThe first enantioselective total synthesis of (−)‐deoxoapodine is described. Our synthesis of this hexacyclic aspidosperma alkaloid includes an efficient molybdenum‐catalyzed enantioselective ring‐closing metathesis reaction for the desymmetrization of an advanced intermediate that introduces the C5‐quaternary stereocenter. After C21‐oxygenation, the pentacyclic core was accessed by electrophilic C19‐amide activation and transannular spirocyclization. A biogenetically inspired dehydrative C6‐etherification reaction proved highly effective to secure the F‐ring and the fourth contiguous stereocenter of (−)‐deoxoapodine with complete stereochemical control.
Controlled Synthesis of 3D Flower‐like Ni2P Composed of Mesoporous Nanoplates for Overall Water Splitting
Authors: Zheng Haiyan , Huang Xiubing , Wu Zhenyu , Gao Hongyi , Dong Wenjun , Wang Ge 
Published: September 2017

AbstractDeveloping efficient non‐noble metal and earth‐abundant electrocatalysts with tunable microstructures for overall water splitting is critical to promote clean energy technologies for a hydrogen economy. Herein, novel three‐dimensional (3D) flower‐like Ni2P composed of mesoporous nanoplates with controllable morphology and high surface area was prepared by a hydrothermal method and low‐temperature phosphidation as efficient electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Compared with the urchin‐like NixPy, the 3D flower‐like Ni2P with a diameter of 5 μm presented an efficient and stable catalytic performance in 0.5 m H2SO4, with a small Tafel slope of 79 mV dec−1 and an overpotential of about 240 mV at a current density of 10 mA cm−2 with a mass loading density of 0.283 mg cm−2. In addition, the catalyst also exhibited a remarkable performance for the OER in 1.0 m KOH electrolyte, with an overpotential of 320 mV to reach a current density of 10 mA cm−2 and a small Tafel slope of 72 mV dec−1. The excellent catalytic performance of the as‐prepared Ni2P may be ascribed to its novel 3D morphology with unique mesoporous structure.
Beispiel einer erschütterungsarmen Tiefgründung mit Fertigrammpfählen aus Stahlbeton
Authors: Vavrina Lars , Windeln Dirk 
Published: September 2017

AbstractSofern bei der Ausführung von Fertigrammpfählen aus Stahlbeton Hydraulikhämmer verwendet werden, ist der Einbau der Pfähle gemäß DIN 18304 „Ramm‐, Rüttel‐ und Pressarbeiten“ [1] als erschütterungsarm zu bezeichnen. Verfahrensbedingt sind Erschütterungen bei der Ausführung von Rammpfählen nie gänzlich auszuschließen, da durch die dynamische Einwirkung der Boden in Bewegung versetzt und verdrängt wird. Die impulsartige Verdrängung führt zu Erschütterungen, die sich im Boden bis zu benachbarten Bauwerksfundamenten fortpflanzen und übertragen können. Um eine Beeinträchtigung benachbarter Bauwerke zu vermeiden oder zu minimieren, erscheint es sinnvoll bereits in der Planung einer Gründungsmaßnahme die Erschütterungseinwirkungen zu prognostizieren. Zur Prognose von Erschütterungen infolge Schlagrammung bietet die Literatur rechnerische Ansätze, mit denen Boden‐ oder Fundamentschwinggeschwindigkeiten ermittelt werden können. Für die Bewertung gibt es Beurteilungskriterien nach DIN 4150 für Schwinggeschwindigkeiten bei denen Schäden ausgeschlossen werden können.Das in diesem Beitrag vorgestellte Beispiel eines Bauvorhabens in der Stadt Essen in Nordrhein‐Westfalen veranschaulicht, dass die vor Ort aufgenommenen Messwerte im Vergleich mit den Beurteilungskriterien nach DIN 4150 [2, 3] auf der sicheren Seite liegen und die Schwinggeschwindigkeiten bei sachgerechter Ausführung in der Regel unkritisch für Bauwerke sind.
Atrial septostomy with a predefined diameter using a novel occlutech atrial flow regulator improves symptoms and cardiac index in patients with severe pulmonary arterial hypertension
Authors: Rajeshkumar Ramasamy , Pavithran Sreeja , Sivakumar Kothandam , Vettukattil Joseph J. 
Published: September 2017

AbstractObjectivesA novel Occlutech atrial flow regulator (AFR) implantation gives an atrial septal predefined predictable fenestration.BackgroundAtrial septostomy relieves syncope in pulmonary arterial hypertension (PAH) by improving left heart filling, cardiac output and systemic oxygen transport despite hypoxia. Symptoms recur when small fenestrations close spontaneously.MethodsAFR was implanted after informed consent in patients with severe PAH presenting with syncope and right heart failure. Symptoms, hemodynamics, echocardiographic parameters, brain natriuretic peptide (BNP) levels and device patency were serially documented.ResultsTwelve patients aged 28.3 ± 8.5 years with severe PAH underwent AFR implantation. All procedures were successful without any major complications. All patients had relief of syncope and 6‐min walk distance improved significantly from 377.3 ± 33.2 to 423 ± 31.32 m. The cardiac index (2.36 ± 0.52 to 2.89 ± 0.56 L/min/m2) and systemic oxygen transport (367.5 ± 75.5 to 428.0 ± 67.1 ml/min/m2) also showed a significant improvement. Inferior caval vein congestion and pericardial effusion reduced due to improvement in heart failure, but other echocardiographic parameters of right ventricular function did not show significant change. The reduction in BNP levels too did not reach statistical significance. The device was patent in all patients at a median follow‐up of 189 days (range 10–296 days) resulting in a significant reduction of oxygen saturations from 98 ± 0.18 to 85.26 ± 2.86% after exercise.ConclusionsAFR implantation was feasible and safe in all patients with PAH. There was a significant improvement of symptoms, six‐minute walk distance, cardiac index and systemic oxygen transport. The device maintained patency in short‐term follow‐up and the resultant hypoxia was tolerated well.