bluuebunny/crossref_metadata_2025_split huggingface dataset:
Magnetic‐Anisotropy‐Enhanced Electrical Transport Properties of Co/Bi0.5Sb1.5Te3/PVDF Flexible Thermoelectromagnetic Films
Authors: Yan Wenguang , Nie Xiaolei , Ke Shaoqiu , Hu Yuan , Ai Xiaoling , Zhu Wanting , Zhao Wenyu , Zhang Qingjie 
Published: October 2022

AbstractA built‐in magnetic field by magnetic embedding has been proven to be an effective approach to improve the electro‐thermal conversion performance of thermoelectric materials. However, the function of the built‐in magnetic field direction is still unknown. In this study, ferromagnetic Co particles with different morphologies are introduced into Bi0.5Sb1.5Te3/PVDF thermoelectric films to control the direction of the built‐in magnetic field. Co particles with shape anisotropy establish magnetic anisotropy fields inside the flexible thermoelectromagnetic films, which make the magnetic moments tend to be aligned parallel to the film surface, causing spiral motion of carriers. The atomic‐scale micro‐electric field established by the in situ reaction of Co and Te induces hopping migration of carriers. The coupling of the magnetic anisotropy field and micro‐electric field brings about a substantial increase in carrier mobility, thus greatly enhancing conductivity. The carrier energy filtering effect generated by Bi0.5Sb1.5Te3/CoTe2/Co hetero interface and additional magnetic scattering provided by the CoTe2/Co micro‐magnetic field maintain the Seebeck coefficient at a high level. The maximum power factor of Co/Bi0.5Sb1.5Te3/PVDF flexible thermoelectromagnetic film with sheet Co particles reaches 1.45 mW m−1 K−2 at 300 K, increased by 54% and 6% as compared with that of Bi0.5Sb1.5Te3/PVDF thermoelectric film and Co/Bi0.5Sb1.5Te3/PVDF flexible thermoelectromagnetic film with spherical Co particles, respectively.
Viscoelastic Notch Signaling Hydrogel Induces Liver Bile Duct Organoid Growth and Morphogenesis
Authors: Rizwan Muhammad , Ling Christopher , Guo Chengyu , Liu Tracy , Jiang Jia‐Xin , Bear Christine E. , Ogawa Shinichiro , Shoichet Molly S. 
Published: October 2022

AbstractCholangiocyte organoids can be used to model liver biliary disease; however, both a defined matrix to emulate cholangiocyte self‐assembly and the mechano‐transduction pathways involved therein remain elusive. A series of defined viscoelastic hyaluronan hydrogels to culture primary cholangiocytes are designed and it is found that by mimicking the stress relaxation rate of liver tissue, cholangiocyte organoid growth can be induced and expression of Yes‐associated protein (YAP) target genes could be significantly increased. Strikingly, inhibition of matrix metalloproteinases (MMPs) does not significantly affect organoid growth in 3D culture, suggesting that mechanical remodeling of the viscoelastic microenvironment—and not MMP‐mediated degradation—is the key to cholangiocyte organoid growth. By immobilizing Jagged1 to the hyaluronan, stress relaxing hydrogel, self‐assembled bile duct structures form in organoid culture, indicating the synergistic effects of Notch signaling and viscoelasticity. By uncovering critical roles of hydrogel viscoelasticity, YAP signaling, and Notch activation, cholangiocyte organogenesis is controlled, thereby paving the way for their use in disease modeling and/or transplantation.
A Unimolecular System Combining Efficient Inhibition of NDM‐1 by Coordination Interactions with High ROS for Synergistically Tackling Drug‐Resistant Bacteria
Authors: Li Meiqi , li Ling , Yuan Qiong , Bao Benkai , Tang Yanli 
Published: October 2022

AbstractNew Delhi metallo‐β‐lactamase (NDM‐1) that can hydrolyze almost all clinical β‐lactam antibacterial causes “Super” bacterial infection, which seriously threatens human health worldwide. Therefore, it is urgent to establish powerful methods for inhibiting NDM‐1 activity and efficient anti‐resistant bacteria. Herein, a new strategy for the depression of NDM‐1 activity and synergistic therapy to overcome drug‐resistant bacteria based on conjugated oligomer (OPV)‐modified porphyrin derivatives OPV‐C6‐TPP probe is developed. The unimolecular probe not only can coordinate Zn2+ in NDM‐1 to suppress the activity of NDM‐1 but also produce the high 1O2 under light irradiation, providing dual functions of activating antibiotics and photodynamic therapy. The chelation inhibition mechanism of OPV‐C6‐TPP on NDM‐1 is investigated and further confirmed by molecular docking and molecular dynamics simulation studies. In the presence of probe, the minimum inhibitory concentration of antibiotic model cefazolin is reduced ≈50 times, significantly reversing resistance and resensitizing NDM‐1‐overexpressing Escherichia coli (E. coli‐NDM‐1) to antibiotics. Furthermore, the combined system greatly accelerates wound healing in E. coli‐NDM‐1 infected mice due to photodynamic and antibiotic synergistic effects. This study paves the way for the efficient treatment of drug‐resistant bacteria.
Construction of an Orderly Carbon Fiber/Carbon Nanotubes Hybrid Composites by a Mild, Effective, and Green Method for Highly Interface Reinforcement
Authors: Wu Dongliang , Hao Zhenna , Sheng Yujing , Zhao Qilong , Dong Qi , Han Yongqin , Liu Lei , Zhang Ruliang , Wang Maoju 
Published: October 2022

AbstractThe low‐damage and high‐efficiency tight bonding of two inert materials, carbon nanotubes (CNTs) and carbon fibers (CFs), is implemented simply and mildly based on the secondary reaction platform role of polydopamine (PDA). The strong adhesion of PDA can fix varying masses of CNTs stably and uniformly on the surface of carbon fiber, which significantly augments the polar component and roughness of fiber surface. In the proposed control method, the interface shear strength and interlaminar shear strength of CF‐PDA6‐CNTs0.05 increase by ≈61.03% and 55.30% compared to desized CFs based composites. Remarkably, the improvement mechanism in the mechanical properties of the composites is analyzed by the transverse fracture morphology of the composites as well as thermodynamically.
Zero‐Magnetostriction Magnetically Soft High‐Entropy Alloys in the AlCoFeNiCux (x = 0.6–3.0) System for Supersilent Applications
Authors: Luzar Jože , Priputen Pavol , Drienovský Marián , Vrtnik Stanislav , Koželj Primož , Jelen Andreja , Wencka Magdalena , Gačnik Darja , Mihor Peter , Ambrožič Bojan , Dražić Goran , Meden Anton , Dolinšek Janez 
Published: October 2022

AbstractSearching for materials that possess a combination of excellent magnetic softness and vanishing magnetostriction, the ferromagnetic high‐entropy alloy (HEA) system AlCoFeNiCux (x = 0.6–3.0) is investigated. Superior magnetostriction and magnetic softness parameters are obtained for the composition AlCoFeNiCu2.0, which shows zero magnetostriction, λs = 0, low coercivity Hc ≈ 650 A m−1 and substantial saturation magnetic polarization of Js ≈ 0.55 T. The parameters of other AlCoFeNiCux compositions in the range x = 2.0–3.0 are only slightly different, so that the entire set of the AlCoFeNiCux HEAs in that Cu content range can be classified as magnetically soft and vanishing‐magnetostriction alloys. The alloys develop a multiphase (up to three phases) composite microstructure that is further nanostructured on the 10 nm scale. Magnetic softness of the alloys originates from the exchange‐averaging of magnetic anisotropy, while vanishing magnetostriction coefficient of the AlCoFeNiCu2.0 alloy results from its three‐phase microstructure, where the magnetostrictions of different signs exactly compensate each other at particular volume fractions. The AlCoFeNiCux (x = 2.0–3.0) HEAs are expected to find applications as supersilent (inaudible to a human ear) materials for transformers, magnetocaloric coolers, and other “humming” electromagnetic machinery.
Optoelectronic Synapses Based on MoS2 Transistors for Accurate Image Recognition
Authors: Huang Biying , Li Na , Wang Qinqin , Ouyang Chen , He Congli , Zhang Lianchang , Du Luojun , Yang Wei , Yang Rong , Shi Dongxia , Zhang Guangyu 
Published: October 2022

AbstractNeuromorphic chips show advantages over conventional computing system based on von Neumann architecture when dealing with complex scenes, such as artificial intelligence, automatic driving, image, and speech recognition. However, current neuromorphic circuitry usually suffers from device complexity, low computing speed, and efficiency issues. Here, the fabrication of artificial optoelectronic synapses based on MoS2 field‐effect transistors (FETs) to integrate the sensing, memorizing, and preprocessing functions together is reported. Light‐tunable and gate‐voltage modulated behaviors enable those devices to implement many opto‐synaptic functions, such as paired‐pulse facilitation (PPF), short‐term memory (STM), long‐term memory (LTM), the transition of STM‐to‐LTM, and interest‐modulate human visual memory. Moreover, background noise filtering for image preprocessing with a high recognition accuracy ≈85.5% is realized in MoS2‐based optoelectronic array devices. These simple but prospective opto‐synaptic devices provide an alternative approach to construct neuromorphic visual systems.
High Conductivity Update Linearity MoS2 Memtransistors Array Based on Lithium‐Ion Modulation
Authors: Zhang Lifang , Liang Ange , Wang Fang , Han Yemei , Lin Xin , Shan Xin , Hu Kai , Xie Yangyang , Sun Zheng , Song Zhitang , Zhang Kailiang 
Published: October 2022

AbstractThe typical nonlinear and asymmetric response of synaptic memristors based on 2D layered materials to positive and negative electrical pulses makes the implementation of accurate deep neural networks very challenging. Here, it has been constructed an integrated circuit (IC) process‐compatible array of modulatable neuromorphic devices based on MoS2 three‐terminal memristors and show that the switching characteristics of this memristor become more gradual and symmetric under electrical excitation, yielding up to 98% linearity of conductance updates in optimized simulations of biological synaptic behavior, achieving long‐term plasticity of 150 s. The linear weight update has better predictability and distinguishability. And all‐solid lithium cobaltate is introduced as an independent modulation channel to obtain a modulatable molybdenum disulfide bandgap by controlling the embedding and disembedding of lithium ions, which effectively reduces the contact potential barrier and more flexibly modulates the artificial synaptic properties based on multiple coupling of light, electricity, and ions. This work lays the foundation for the realization of high‐density and energy‐efficient neuromorphic computing chips.
Chalcogenide Glass IR Artificial Compound Eyes Based on Femtosecond Laser Microfabrication
Authors: Wang Shaokun , Zhang Fan , Yang Qing , Li Minjing , Hou Xun , Chen Feng 
Published: October 2022

AbstractThe compact and lightweight infrared (IR) optics devices are highly demanded in booming applications. However, fabrication of IR optics devices with high efficiency is still technically challenging, especially artificial compound eyes (ACE) with low aberration imaging and large field of view. In this work, a method of femtosecond laser wet etching combining with the “two‐step” precision glass molding based on chalcogenide glass is proposed to fabricate glass IR ACE. The as‐prepared consists of 6000 ommatidia (diameter of 88 µm and the sag height of 11 µm) arranged in a hexagonal manner with perfect parabolic morphology and high uniformity. The chalcogenide glass IR ACE exhibits excellent optical performance both in IR active imaging and IR passive imaging with high transmittance (60–70%) ranging from 2.5 to 15 µm. The ommatidia have a high resolution up to 20.16 lp mm−1, and imaging with large field of view up to 60° and low aberration can be achieved. Furthermore, the proposed technology shows advantages to fabricate glass IR ACE with low cost and high efficiency, and glass IR ACE shows great potential in IR imaging, robot vision, IR 3D motion tracking, and so on.
A Simultaneous Material‐Device Optimization for Plasmonic Devices: A Combined Ab Initio and Electromagnetic Simulation for Photothermal Transducers
Authors: Ngo Thien Duc , Tran Toan Phuoc , Ngo Hai Dang , Nagao Tadaaki 
Published: October 2022

AbstractA novel seamless approach combining first‐principles calculations and electromagnetic device simulations is demonstrated to assess an appropriate compound material, together with an optimized device geometry, for high‐temperature infrared transducers. The electronic structures and dielectric properties of three distinct classes of materials with metallic bonds, ionic bonds, and covalent bonds are theoretically examined, ranging from elemental metals to nitrides, carbides, and borides. Among the representative candidates, CeB6 is identified as the optimal selection since the ab initio theory results show that it exhibits a low‐loss plasmonic response in the near‐infrared region (below 1.7 eV), providing a promising platform for infrared surface plasmon photonics. As a proof‐of‐concept, a metal‐insulator‐metal stripe array is simultaneously designed to examine the potential device applications for photothermal transducers. With this approach, and as a refractory conductor, CeB6 is predicted to be a promising candidate for versatile thermoplasmonic applications. It is believed that our one‐stop material‐device optimization scheme can be readily extended to high‐throughput combinatorial investigations to search for novel compound plasmonic materials and devices in a wider range of existing materials.
Quasi‐2D Ruddlesden–Popper Perovskites with Low Trap‐States for High Performance Flexible Self‐Powered Ultraviolet Photodetectors
Authors: Han Jiaheng , Liu Caichi , Zhang Yangyang , Guan Yan , Zhang Xian , Yu Wenjin , Tang Zhenyu , Liang Yuchao , Wu Cuncun , Zheng Shijian , Xiao Lixin 
Published: October 2022

AbstractOrganic–inorganic perovskite photodetectors have drawn great attention due to their excellent performance and simple fabrication process. However, the detectivity of perovskite ultraviolet photodetectors (UV‐PDs) is comparatively poor because of the high defect density in chlorine‐containing 3D perovskites. Furthermore, 3D perovskites are easily degraded by high‐energy ultraviolet light, limiting their practical applications. Herein, high quality quasi‐2D Ruddlesden–Popper perovskite (Q‐2DRPP) (PMA)2MA2Pb3Cl10 (PMA+ = C6H5CH2NH3+, MA+ = CH3NH3+) films are prepared for UV‐PDs. It is found that Q‐2DRPP films have lower defect density and larger resistance than conventional 3D perovskite films, which improves the performance of UV‐PDs. The dark current density and maximum detectivity of the Q‐2DRPP film‐based device are 4.96 × 10−10 A cm−2 and 2.59 × 1012 Jones, respectively, which are both higher than those of the reference 3D perovskite‐based devices (2.29 × 10−8 A cm−2 and 6.08 × 1011 Jones). Moreover, Q‐2DRPP film‐based flexible UV‐PD has excellent bending stability; its photocurrent can retain 85% of its initial value after 1000 bending cycles. Q‐2DRPP film‐based devices have demonstrated long‐term light and environmental stability. These results imply that Q‐2DRPP films have great potential for high‐performance UV‐PDs.
Artificial Neural Network for Direction‐of‐Arrival Estimation and Secure Wireless Communications Via Space‐Time‐Coding Digital Metasurfaces
Authors: Chen Xiao Qing , Zhang Lei , Liu Shuo , Cui Tie Jun 
Published: October 2022

AbstractDirection of arrival (DOA) estimation has long been an attractive research topic in various industries and is a vital technique for intelligent wireless systems. Conventional DOA estimation methods based on array antennas suffer from high latency in signal postprocessing, leading to complex hardware architecture, high cost, and low efficiency. Recently, some metasurface‐based methods have emerged as alternatives, but they have limited applications due to the stringent requirements for equipment and environment. Here, an efficient method is proposed to lift these limitations by combining artificial neural networks (ANNs) with space‐time‐coding (STC) digital metasurfaces. The ANN‐enabled DOA estimation achieves high accuracy by simply analyzing the spatial‐spectral characteristics of the STC modulation, which utilizes only harmonic amplitudes without phases, and thus features a much‐simplified hardware architecture. The proposed method does not require large computational resources and is more robust in practical applications. For validation, several ANN models trained with simulated and measured data are presented in a microwave regime. Moreover, a potential application of this method is demonstrated in secure communications. The proposed theory and metasurface provide on‐demand selections of ANN models for reaching optimal DOA estimations in different scenarios, which holds promising applications in wireless sensing, communication, radar, and other self‐adaptive information systems.
In‐MOF‐Derived Hierarchically Hollow Carbon Nanostraws for Advanced Zinc‐Iodine Batteries
Authors: Chai Lulu , Wang Xian , Hu Yue , Li Xifei , Huang Shaoming , Pan Junqing , Qian Jinjie , Sun Xueliang 
Published: October 2022

AbstractHollow carbon materials are regarded as crucial support materials in catalysis and electrochemical energy storage on account of their unique porous structure and electrical properties. Herein, an indium‐based organic framework of InOF‐1 can be thermally carbonized under inert argon to form indium particles through the redox reaction between nanosized indium oxide and carbon matrix. In particular, a type of porous hollow carbon nanostraw (HCNS) is in situ obtained by combining the fusion and removal of indium within the decarboxylation process. The as‐synthesized HCNS, which possesses more charge active sites, short and quick electron, and ion transport pathways, has become an excellent carrier for electrochemically active species such as iodine with its unique internal cavity and interconnected porous structure on the tube wall. Furthermore, the assembled zinc‐iodine batteries (ZIBs) provide a high capacity of 234.1 mAh g−1 at 1 A g−1, which ensures that the adsorption and dissolution of iodine species in the electrolyte reach a rapid equilibrium. The rate and cycle performance of the HCNS‐based ZIBs are greatly improved, thereby exhibiting an excellent capacity retention rate. It shows a better electrochemical exchange capacity than typical unidirectional carbon nanotubes, making HCNS an ideal cathode material for a new generation of high‐performance batteries.
Kirigami‐Inspired Programmable Soft Magnetoresponsive Actuators with Versatile Morphing Modes
Authors: Zhu Hanlin , Wang Yuan , Ge Yangwen , Zhao Yan , Jiang Chao 
Published: October 2022

AbstractUntethered soft magnetoresponsive actuators (SMRAs), which can realize rapid shape transformation, have attracted widespread attention for their strategic applications in exploration, transportation, and minimally invasive medicine. It remains a challenge to fabricate SMRAs with complicated morphing modes (more than bending and folding), limiting their applications to simple shape‐morphing and locomotion. Herein, a method integrating the ancient kirigami art and an advanced mechanical assembly method is proposed, which realizes 2D‐to‐3D and 3D‐to‐3D complicated shape‐morphing and precise magnetization programming through cut‐guided deformation. The kirigami‐inspired SMRAs exhibit good robustness after actuating more than 10000 times. An integrated finite element analysis method is developed to quantitatively predict the shape transformation of SMRAs under magnetic actuation. By leveraging this method, a set of 3D curved responsive morphologies with programmed Gaussian curvature are fabricated (e.g., ellipsoid and saddle structures), specifically 3D multilayer structures and face‐like shapes with different expressions, which are difficult to realize using previous approaches. Furthermore, a bionic‐scaled soft crawling robot with significant obstacle surmounting ability is fabricated using the kirigami‐inspired method. The ability of the method to achieve programmable SMRAs with versatile morphing modes may broaden its applications in soft robotics, color‐switchable devices, and clinical treatments.
Bubble‐Channeling Electrophoresis of Honeycomb‐Like Chitosan Composites
Authors: Huang Bo‐Han , Chen Li‐Jie , Chiou Yu‐Jie , Whang Grace , Luo Yunkai , Yan Yichen , Wei Kung‐Hwa , He Ximin , Dunn Bruce , Wu Pu‐Wei 
Published: October 2022

AbstractA chitosan composite with a vertical array of pore channels is fabricated via an electrophoretic deposition (EPD) technique. The composite consists of chitosan and polyethylene glycol, as well as nanoparticles of silver oxide and silver. The formation of hydrogen bubbles during EPD renders a localized increase of hydroxyl ions that engenders the precipitation of chitosan. In addition, chemical interactions among the constituents facilitate the establishment of vertical channels occupied by hydrogen bubbles that leads to the unique honeycomb‐like microstructure; a composite with a porosity of 84%, channel diameter of 488 µm, and channel length of 2 mm. The chitosan composite demonstrates an impressive water uptake of 2100% and a two‐stage slow release of silver. In mass transport analysis, both Disperse Red 13 and ZnO powders show a much enhanced transport rate over that of commercial gauze. Due to its excellent structural integrity and channel independence, the chitosan composite is evaluated in a passive suction mode for an adhesive force of 9.8 N (0.56 N cm−2). The chitosan composite is flexible and is able to maintain sufficient adhesive force toward objects with different surface curvatures.
Intrinsically Stretchable and Non‐Halogenated Solvent Processed Polymer Solar Cells Enabled by Hydrophilic Spacer‐Incorporated Polymers
Authors: Lee Jin‐Woo , Lim Chulhee , Lee Sun‐Woo , Jeon Yeonji , Lee Seungjin , Kim Taek‐Soo , Lee Jung‐Yong , Kim Bumjoon J. 
Published: October 2022

AbstractBlends of polymer donors (PDs) and small molecule acceptors (SMAs) have afforded highly efficient polymer solar cells (PSCs). However, most of the efficient PSCs are processed using toxic halogenated solvents, and they are mechanically fragile. Here, a new series of PDs by incorporating a hydrophilic oligo(ethylene glycol) flexible spacer (OEG‐FS) is developed, and efficient PSCs with a high power conversion efficiency (PCE) of 17.74% processed by a non‐halogenated solvent are demonstrated. Importantly, the incorporation of these OEG‐FSs into the PDs significantly increases the mechanical robustness and ductility of resulting PSCs, making them suitable for application as stretchable devices. The OEG‐FS alleviates excessive backbone rigidity of the PDs while enhancing their pre‐aggregation in the non‐halogenated solvent. In addition, the OEG‐FS in the PDs enhances PD‐SMA interfacial interactions and improves blend morphology, resulting in efficient charge generation and mechanical stress dissipation. The resulting PSCs demonstrate a superior PCE (17.74%) and high crack‐onset strain (COS = 10.50%), outperforming the PSCs without OEG (PCE = 15.64% and COS = 2.99%). Importantly, intrinsically stretchable (IS) PSCs containing the PD featuring OEG‐FS exhibit a high PCE (12.05%) and stretchability (maintaining 80% of the initial PCE after 22% strain), demonstrating their viability for wearable applications.