bluuebunny/crossref_metadata_2025_split huggingface dataset:
Metasurface‐Programmable Wireless Network‐On‐Chip
Authors: F. Imani Mohammadreza , Abadal Sergi , del Hougne Philipp 
Published: June 2022

AbstractThis paper introduces the concept of smart radio environments, currently intensely studied for wireless communication in metasurface‐programmable meter‐scaled environments (e.g., inside rooms), on the chip scale. Wireless networks‐on‐chips (WNoCs) are a candidate technology to improve inter‐core communication on chips but current proposals are plagued by a dilemma: either the received signal is weak, or it is significantly reverberated such that the on–off‐keying modulation speed must be throttled. Here, this vexing problem is overcome by endowing the wireless on‐chip environment with in situ programmability which enables the shaping of the channel impulse response (CIR); thereby, a pulse‐like CIR shape can be imposed despite strong multipath propagation and without entailing a reduced received signal strength. First, a programmable metasurface suitable for integration in the on‐chip environment (“on‐chip reconfigurable intelligent surface”) is designed and characterized. Second, its configuration is optimized to equalize selected wireless on‐chip channels “over the air.” Third, by conducting a rigorous communication analysis, the feasibility of significantly higher modulation speeds with shaped CIRs is evidenced. The results introduce a programmability paradigm to WNoCs which boosts their competitiveness as complementary on‐chip interconnect solution.
X‐ray Stain Localization with Near‐Field Ptychographic Computed Tomography
Authors: Taphorn Kirsten , Busse Madleen , Brantl Johannes , Günther Benedikt , Diaz Ana , Holler Mirko , Dierolf Martin , Mayr Doris , Pfeiffer Franz , Herzen Julia 
Published: June 2022

AbstractAlthough X‐ray contrast agents offer specific characteristics in terms of targeting and attenuation, their accumulation in the tissue on a cellular level is usually not known and difficult to access, as it requires high resolution and sensitivity. Here, quantitative near‐field ptychographic X‐ray computed tomography is demonstrated to assess the location of X‐ray stains at a resolution sufficient to identify intracellular structures by means of a basis material decomposition. On the example of two different X‐ray stains, the nonspecific iodine potassium iodide, and eosin Y, which mostly interacts with proteins and peptides in the cell cytoplasm, the distribution of the stains within the cells in murine kidney samples is assessed and compared to unstained samples with similar structural features. Quantitative nanoscopic stain concentrations are in good agreement with dual‐energy micro computed tomography measurements, the state‐of‐the‐art modality for material‐selective imaging. The presented approach can be applied to a variety of X‐ray stains advancing the development of X‐ray contrast agents.
Constructing Direct Z‐Scheme Heterostructure by Enwrapping ZnIn2S4 on CdS Hollow Cube for Efficient Photocatalytic H2 Generation
Authors: Li Chuan‐Qi , Du Xin , Jiang Shan , Liu Yan , Niu Zhu‐Lin , Liu Zhong‐Yi , Yi Sha‐Sha , Yue Xin‐Zheng 
Published: June 2022

AbstractRational design hybrid nanostructure photocatalysts with efficient charge separation and transfer, and good solar light harvesting ability have critical significance for achieving high solar‐to‐chemical conversion efficiency. Here a highly active and stable composite photocatalyst is reported by integrating ultrathin ZnIn2S4 nanosheets on surface of hollow CdS cube to form the cube‐in‐cube structure. Experimental results combined with density functional theory calculations confirm that the Z‐scheme ZnIn2S4/CdS heterojunction is formed, which highly boosts the charge separation and transfer under the local‐electric‐field at semiconductor/semiconductor interface, and thus prolongs their lifetimes. Moreover, such a structure affords the highly enhanced light‐harvesting property. The optimized ZnIn2S4/CdS nanohybrids exhibit superior H2 generation rate under visible‐light irradiation (λ ≥ 420 nm) with excellent photochemical stability during 20 h continuous operation.
Interfacially Locked Metal Aerogel Inside Porous Polymer Composite for Sensitive and Durable Flexible Piezoresistive Sensors
Authors: Li Jian , Li Ning , Zheng Yuanyuan , Lou Dongyang , Jiang Yue , Jiang Jiaxi , Xu Qunhui , Yang Jing , Sun Yujing , Pan Chuxuan , Wang Jianlan , Peng Zhengchun , Zheng Zhikun , Liu Wei 
Published: June 2022

AbstractFlexible pressure sensors play significant roles in wearable devices, electronic skins, and human‐machine interface (HMI). However, it remains challenging to develop flexible piezoresistive sensors with outstanding comprehensive performances, especially with excellent long‐term durability. Herein, a facile “interfacial locking strategy” has been developed to fabricate metal aerogel‐based pressure sensors with excellent sensitivity and prominent stability. The strategy broke the bottleneck of the intrinsically poor mechanical properties of metal aerogels by grafting them on highly elastic melamine sponge with the help of a thin polydimethylsiloxane (PDMS) layer as the interface‐reinforcing media. The hierarchically porous conductive structure of the ensemble offered the as‐prepared flexible piezoresistive sensor with a sensitivity as high as 12 kPa−1, a response time as fast as 85 ms, and a prominent durability over 23 000 compression cycles. The excellent comprehensive performance enables the successful application of the flexible piezoresistive sensor as two‐dimensional (2D) array device as well as three‐dimensional (3D) force‐detecting device for real‐time monitoring of HMI activities.
Highly Selective Synthesis of cis‐2,2,4,4‐Tetramethylcyclobutane‐1,3‐diol via Solvent‐Free Hydrogenation and Isomerization
Authors: Park Kwihwan , Furusato Shinichi , Furugen Chikara , Ikawa Takashi , Yamada Tsuyoshi , Sajiki Hironao 
Published: June 2022

AbstractIn this study, ruthenium‐on‐carbon‐catalyzed hydrogenation of CBDK was developed for the production of cis‐CBDO under solvent‐free conditions. Isomerization using a ruthenium catalyst and hydrogen gas may improve the selective formation of cis‐CBDO. Moreover, the reaction mechanisms for cis‐selectivity was proposed based on density functional theory (DFT) calculations.
Copper‐Catalyzed Oxidative Amidation for the Synthesis of α‐Ketoamides from α‐Diazoketones with Amines Using Oxygen as Oxidant
Authors: Zhang Jianlan , Zhu Youyu , Cai Jiangtao , Jia Jia , Liu Guoyang , Dang Yongqiang , Wang Xuesong , Zhang Yating 
Published: June 2022

AbstractA novel and efficient CuI‐catalyzed oxidative amidation for the synthesis of α‐ketoamides from α‐diazoketones with amines has been developed, which employs O2 as an environmentally friendly oxidant. Based on control experiments and the reactivity of α‐diazoketones, 2‐morpholino‐1‐phenylethanone was identified as a significant intermediate in this process and a plausible reaction mechanism was proposed. This methodology is a feasible, mild approach to α‐ketoamides in moderate to good yields.
Spontaneous Ammonia Activation Through Coordination‐Induced Bond Weakening in Molybdenum Complexes of a Dianionic Pentadentate Ligand Platform**
Authors: Almquist C. Christopher , Removski Nicole , Rajeshkumar Thayalan , Gelfand Benjamin S. , Maron Laurent , Piers Warren E. 
Published: June 2022

AbstractAmmonia oxidation catalyzed by molecular compounds is of current interest as a carbon‐free source of dihydrogen. Activation of N−H bonds through coordination to transition metal centers is a key reaction in this process. We report the substantial activation of ammonia via reaction with low‐valent molybdenum complexes of a diborate pentadentate ligand system. Spontaneous loss of dihydrogen from (B2Pz4Py)MoII−NH3 at room temperature to produce the dinuclear μ‐nitrido compound (B2Pz4Py)Mo‐N‐Mo(B2Pz4Py) is observed due to substantial N−H bond weakening upon coordination to Mo. Mechanistic details are supported through the experimental observation/characterization of terminal amido, imido and nitrido complexes and density functional theory computations. The generally under‐appreciated role of bridging nitrido intermediates is revealed and discussed, providing guidance for further catalyst development for this process.
Fast A‐Site Cation Cross‐Exchange at Room Temperature: Single‐to Double‐ and Triple‐Cation Halide Perovskite Nanocrystals
Authors: Otero‐Martínez Clara , Imran Muhammad , Schrenker Nadine J. , Ye Junzhi , Ji Kangyu , Rao Akshay , Stranks Samuel D. , Hoye Robert L. Z. , Bals Sara , Manna Liberato , Pérez‐Juste Jorge , Polavarapu Lakshminarayana 
Published: June 2022

AbstractWe report here fast A‐site cation cross‐exchange between APbX3 perovskite nanocrystals (NCs) made of different A‐cations (Cs (cesium), FA (formamidinium), and MA (methylammonium)) at room temperature. Surprisingly, the A‐cation cross‐exchange proceeds as fast as the halide (X=Cl, Br, or I) exchange with the help of free A‐oleate complexes present in the freshly prepared colloidal perovskite NC solutions. This enabled the preparation of double (MACs, MAFA, CsFA)‐ and triple (MACsFA)‐cation perovskite NCs with an optical band gap that is finely tunable by their A‐site composition. The optical spectroscopy together with structural analysis using XRD and atomically resolved high‐angle annular dark‐field scanning transmission electron microscopy (HAADF‐STEM) and integrated differential phase contrast (iDPC) STEM indicates the homogeneous distribution of different cations in the mixed perovskite NC lattice. Unlike halide ions, the A‐cations do not phase‐segregate under light illumination.
Magneto‐Orientation of Magnetic Double Stacks for Patterned Anisotropic Hydrogels with Multiple Responses and Modulable Motions
Authors: Dai Chen Fei , Khoruzhenko Olena , Zhang Chengqian , Zhu Qing Li , Jiao Dejin , Du Miao , Breu Josef , Zhao Peng , Zheng Qiang , Wu Zi Liang 
Published: June 2022

AbstractReported here is a multi‐response anisotropic poly(N‐isopropylacrylamide) hydrogel developed by using a rotating magnetic field to align magnetic double stacks (MDSs) that are fixed by polymerization. The magneto‐orientation of MDSs originates from the unique structure with γ‐Fe2O3 nanoparticles sandwiched by two silicate nanosheets. The resultant gels not only exhibit anisotropic optical and mechanical properties but also show anisotropic responses to temperature and light. Gels with complex ordered structures of MDSs are further devised by multi‐step magnetic orientation and photolithographic polymerization. These gels show varied birefringence patterns with potentials as information materials, and can deform into specific configurations upon stimulations. Multi‐gait motions are further realized in the patterned gel through dynamic deformation under spatiotemporal light and friction regulation by imposed magnetic force. The magneto‐orientation assisted fabrication of hydrogels with anisotropic structures and additional functions should bring opportunities for gel materials in biomedical devices, soft actuators/robots, etc.
Redox‐Active Crystalline Coordination Catalyst for Hybrid Electrocatalytic Methanol Oxidation and CO2 Reduction
Authors: Sun Sheng‐Nan , Dong Long‐Zhang , Li Jia‐Ru , Shi Jing‐Wen , Liu Jiang , Wang Yi‐Rong , Huang Qing , Lan Ya‐Qian 
Published: June 2022

AbstractHybrid CO2 electroreduction (HCER) is recognized as an important strategy to improve the total value of redox products and energy conversion efficiency. In this work, a coordination catalyst model system (Ni8‐TET with active oxidation sites, Ni‐TPP with active reduction sites and PCN‐601 with redox‐active sites) for HCER was established for the first time. Especially, PCN‐601 can complete both anodic methanol oxidation and cathodic CO2 reduction with FEHCOOH and FECO over 90 %. The performance can be further improved with light irradiation (FE nearly 100 %). DFT calculations reveal that the transfer of electrons from NiII8 clusters to metalloporphyrins under electric fields results in the raised oxidizability of Ni8 clusters and the raised reducibility of metalloporphyrin, which then improves the electrocatalytic performance. This work serves as a well‐defined model system and puts forward a new design idea for establishing efficient catalysts for hybrid CO2 electroreduction.
Solvent‐Dependent Supramolecular Host–Guest Assemblies of Platinum(II) Tweezers and a Guest System: From Discrete Molecules to High‐Ordered Oligomers
Authors: Yeung Jenny Yuk‐Wa , Kong Fred Ka‐Wai , Hau Franky Ka‐Wah , Chan Michael Ho‐Yeung , Ng Maggie , Leung Ming‐Yi , Yam Vivian Wing‐Wah 
Published: June 2022

AbstractA series of platinum(II) calix[4]arene‐based molecular tweezers was synthesized. The studies of the host–guest association with a charge‐neutral cyclometalated platinum(II) complex showed a drastic color change and the turning on of near‐infrared emission resulting from Pt⋅⋅⋅Pt and π–π interactions. Control of the host–guest assembly process by varying the solvent composition can lead to a change from discrete host and guest molecules to high‐ordered host–guest oligomers with the formation of sheet‐like nanostructures, demonstrating a rare example of three‐state supramolecular host–guest system with high solubility in solvents of diverse polarity. The change in host–guest assembly behaviors could be probed by drastic color changes from yellow to orange to green. The present study provides insights into the systematic design of solvent‐responsive molecular materials using molecular tweezers‐directed host–guest assembly, with potential applications in colorimetric sensing of changes in the micro‐environment.
One‐Step Thermophoretic AND Gate Operation on Extracellular Vesicles Improves Diagnosis of Prostate Cancer
Authors: Deng Jinqi , Zhao Shuai , Li Junhong , Cheng Yangchang , Liu Chao , Liu Zheng , Li Lele , Tian Fei , Dai Bo , Sun Jiashu 
Published: June 2022

AbstractCirculating extracellular vesicles (EVs) have emerged as a valuable source of cancer biomarkers. However, the high degree of EV heterogeneity and the complexity of clinical samples pose a challenge in the sensitive identification of tumor‐derived EVs. Here we introduce a one‐step thermophoretic AND gate operation (Tango) assay that integrates polyethylene glycol (PEG)‐enhanced thermophoretic accumulation of EVs and simultaneous AND gate operation on EV membranes by dual‐aptamers recognition. By using the Tango assay to detect tumor‐derived EVs with co‐presence of EpCAM and PSMA directly from serum in a homogeneous, separation‐free format, we can discriminate prostate cancer (PCa) patients from benign prostatic hyperplasia (BPH) patients in the diagnostic gray zone with an accuracy of 91 % in 15 min. Our approach streamlines EV enrichment and AND gate operation on EVs in a single assay, providing a rapid, straightforward, and powerful method for precise and non‐invasive diagnosis of cancer.
Flexible anodic bonding for the bonding between elastomer and metal
Authors: Zhao Haocheng , Liu Cuirong , Du Chao , Zhang Ying , Zhang Zhichao , Liang Chunping , Wu Yuling 
Published: June 2022

AbstractConsidering the inadaptability of traditional anodic bonding to polymer materials, the flexible anodic bonding process is developed. The bonding characteristics of the dynamic intelligent electric fields with the low‐temperature plasma surface treatment to polymer and ultrasonic‐assisted preconnection before bonding are very suitable for the anodic bonding of polymer elastomer to aluminum (Al) sheet. A series of composite polyurethane elastomer cathode materials (CPECs) with good bonding properties are prepared and characterized. The highest ionic conductivity of CPECs can reach to 2.7 × 10−3 S/cm (CPEC2) at 75°C. After bonded, it is determined that a uniform and dense intermediate bonding layer showed by SEM is formed between CPECs and Al. In addition, different elements including C, O, F, S, and Al are clearly identified by EDS in the bonding layers, showing that the process of flexible anodic bonding has accompanied the directional migration of ions. The maximum tensile strength of bonding layer for CPEC2 and Al (CPEC2‐Al) is up to 2.03 MPa. It is proven that the developed flexible anodic bonding can effectively improve the joint quality and reliability for polymer elastomer materials. All these results of anodic bonding are more potentially valuable to the packaging of flexible devices.
High Performance Lithium Metal Anode with a Nanolayer of LiZn Alloy for All‐Solid‐State Batteries
Authors: Delaporte Nicolas , Perea Alexis , Collin‐Martin Steve , Léonard Mireille , Matton Julie , Gariepy Vincent , Demers Hendrix , Clément Daniel , Rivard Etienne , Vijh Ashok 
Published: June 2022

AbstractAll‐solid‐state batteries (ASSB) require stable and safe lithium (Li) metal anode, which needs surface preparation to increase lithium diffusion and impede the formation of dendrites. In this work, the formation of a thin LiZn layer on lithium metal using sputter deposition is reported. This method was selected due to the absence of solvents and by‐products generated during the modification, for its rapidity and because the formation of the alloy is performed in a clean and controlled atmosphere. Zinc has been chosen for its low cost and high Li+ ion diffusion coefficient of the corresponding LiZn alloy that is 1000 times higher than Li. Different parameters for the Zn deposition were investigated such as the distance between the Zn target and Li foil, the effect of substrate tilt and the direct current applied to the target. Electrochemical performance of LiFePO4/solid polymer electrolyte/Li ASSB demonstrated the superiority of the LiZn anodes and the clear influence of deposition parameters on the durability and performance at high C‐rates. Scanning electron microscopy images of the cross‐sectional view of LFP/SPE/Li stackings extracted from pouch cells after cycling showed an evident migration of Zn into the bulk Li metal anode as well as the formation of AlZn nanoparticles.
Application of a headspace GC–MS method to evaluate the product quality of alcohol‐based hand wipe sanitizers
Authors: Abrigo Nicolas , Ruzicka Connie , Faustino Patrick , Stiber Neil , NguyenPho Agnes , O'Connor Thomas , Shakleya Diaa 
Published: June 2022

AbstractThe investigation of marketed hand wipe sanitizers presented an analytical challenge owing to the need for extraction from the solid matrix of the products. The present work describes the development of a new sample preparation method for the extraction of analytes from the hand wipe sanitizer matrix into dimethyl sulfoxide for analysis using headspace GCMS. Alcohol‐based hand sanitizer (ABHS) wipe products labeled to contain ethanol or isopropanol as active ingredients were tested, varying in the size and weight of the wipes. The spike recovery assay was confirmed using spiking solutions containing impurities at concentrations equivalent to 50, 100 and 200% of the interim concentration limits. All of the tested analytes showed recovery within the allowable limits (80–120%). Six marketed ABHS wipe products were tested and no impurities above the FDA interim limits were observed. One product contained ethanol below the 60% v/v limit and another product was mislabeled for isopropanol and was found to contain ethanol instead. Four of the six ABHS products did not meet the label claim, which may affect the product quality. The analytical method and sample preparation procedures will provide the FDA and ABHS manufacturers with the capability to conduct quality assurance testing of hand wipe sanitizers for active ingredient content and impurities.
Combining hands‐on and virtual experiments for enhancing fluid mechanics teaching: A design‐based research study
Authors: Gutierrez Ronald R. , Escusa Frank , Lyon Joseph A. , Magana Alejandra J. , Cabrera Jose H. , Pehovaz Richard , Link Oscar , Rivillas‐Ospina German , Acuña Guillermo J. , Kuroiwa Julio M. , Guzman Monica X. , Latosinski Francisco G. 
Published: June 2022

AbstractFluid Mechanics courses comprise both theoretical and laboratory modules. In developing nations, computer‐assisted techniques are not commonly applied in Fluid Mechanics instruction. Forced by the COVID‐19 pandemic, South American universities are, however, using them for online teaching. This contribution presents an 8‐semester (2016–2019) educational intervention over an undergraduate Fluid Mechanics course. It mainly blends physical (hands‐on) and virtual experiments (computer fluid dynamics‐based simulations) for the laboratory module, which are complemented by flipped classroom‐based prompts for the theoretical module. The intervention follows design‐based research as a research method and is guided via conjecture mapping and fidelity of implementation standards. Our results suggest that the intervention improves fluid mechanics laboratory instruction, although improvements depend upon the participation of other educational actors such as teaching assistants and laboratory technicians to some extent. Laboratory report grades (the assessment instrument) follow the Gompertz probability distribution. Following UNESCO standards, a portion of the intervention output is shared as open educational resources. This contribution encourages upscaling the educational intervention through the formation of cooperative clusters to build common‐pool Fluid Mechanics resources. Learning scientists have underlined the need to better understand laboratory instruction processes. They have been addressed in very few instances in developing countries. We believe that this study has the potential to provide valuable insights on the matter.
Predictive risk score of respiratory complications in children with mediastinal tumors: A case–control study
Authors: Honda Mamoru , Yuki Arakawa , Takahiro Hosokawa , Chigusa Oyama , Yuichi Mitani , Makiko Mori , Fukuoka Kohei , Koichi Oshima , Yutaka Tanami , Tetsuya Ishimaru , Hiroshi Kawashima , Koichi Mizuta , Ikuya Ueta , Norifumi Kuratani , Katsuyoshi Koh 
Published: June 2022

AbstractBackgroundThe aim of this study was to examine risk factors of respiratory complications at the diagnosis and establish an algorithm of clinical management in children and adolescents with mediastinal tumors.MethodsWe retrospectively collected clinical information of all children and adolescents who presented with mediastinal tumors at Saitama Children's Medical Center from 1999 to 2019, including age, sex, pathological diagnosis, eight major clinical symptoms (cough, dyspnea, hypoxia, orthopnea, chest pain, wheeze, superior vena cava syndrome, and stridor), chest computed tomography (CT) findings (tumor location, mediastinal mass ratio, pleural fluid, pericardial effusion, and compression of trachea and bronchi), types of diagnostic procedure and anesthesia, respiratory complications (severe hypoxia, difficult ventilation, respiratory failure, and cardiopulmonary arrest), and clinical outcome. Subsequently, we calculated the risk score for predicting respiratory complications by combining clinical and radiological findings.ResultsOf the 57 patients, 7 (12%) developed respiratory complications. Cough, dyspnea, hypoxia, and orthopnea were significantly more common in patients with complications (p = 0.02, p = 0.02, p < 0.01, p = 0.03, respectively). The reduction of percentage of tracheal cross‐sectional area (%TCA) and compression of the carina in chest CT were also significantly more common in patients with complications (p < 0.01 and <0.01, respectively). We calculated the risk score of respiratory complications by combining cough, wheeze, stridor, orthopnea, dyspnea, hypoxia, %TCA < 0.5, and compression of the carina. A risk score ≥ 7 showed high predictive accuracy for complications (sensitivity: 100%, specificity: 97.7%, positive likelihood ratio: 43.0).ConclusionThe risk score combining clinical symptoms with radiological findings is a promising predictive tool for respiratory complications in children with mediastinal tumors.