15,286 results match your criteria Advanced Materials[Journal]

Recording Temperature with Magnetic Supraparticles.

Adv Mater 2022 May 20:e2202683. Epub 2022 May 20.

Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Egerlandstraße 1, D-91058, Erlangen, Germany.

Small-sized temperature indicator additives autonomously record temperature events via a gradual irreversible signal change. This permits for instance the indication of possible cold-chain breaches or failure of electronics but also curing of glues. Thus, information about the materials' thermal history can be obtained upon signal detection at every point of interest. Read More

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A print-and-fuse Strategy for Sacrificial Filaments Enables Biomimetically Structured Perfusable Microvascular Networks with Functional Endothelium Inside 3D Hydrogels.

Adv Mater 2022 May 20:e2200653. Epub 2022 May 20.

Chair for Functional Materials for Medicine and Dentistry at the Institute for Functional Materials and Biofabrication (IFB) and Bavarian Polymer Institute (BPI), University of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany.

Current methods of microvessel fabrication mostly rely on self-assembly in tiny volumes, prefabricated designs of microchannels, or demand complicated multi-step procedures based on sacrificial templating to achieve specific geometrical features. Such application-oriented geometries subsequently require a design-specific and functional perfusion system that must be developed in parallel. In this study, we present a facile and flexible approach for the integration of biomimetically branched microvasculature within bulk hydrogels. Read More

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Recent progress in 1D contacts for 2D material-based devices.

Adv Mater 2022 May 20:e2202408. Epub 2022 May 20.

SKKU Advanced Institute of Nano Technology, Sungkyunkwan University, Suwon, 16419, Korea.

Recent studies have intensively examined two-dimensional materials (2DMs) as promising materials for use in future quantum devices due to their atomic thinness. However, a major limitation occurs when 2DMs are in contact with metals; a van der Waals (vdW) gap is generated at the 2DM-metal interfaces, which induces metal-induced gap states that are responsible for uncontrollable Schottky barrier (SB), Fermi-level pinning (FLP), and high contact resistance (R ), thereby substantially lower the electronic mobility of 2DM-based devices. Here, vdW gap-free one-dimensional (1D) edge contact has been studied for use in 2D devices with substantially suppressed carrier scattering of 2DMs with hexagonal boron-nitride (hBN) encapsulation. Read More

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In-situ Synthesis of MOF-74 Family for High Areal Energy Density of Aqueous Nickel-Zinc Batteries.

Adv Mater 2022 May 20:e2201779. Epub 2022 May 20.

School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu, 225009, P. R. China.

Limited by single metal active sites and low electrical conductivity, designing nickel-based metal-organic framework (MOF) materials with high capacity and high energy density remains a challenge. Herein, a series of bi/multimetallic MOF-74 family in situ grown on carbon cloth (CC) by doping M ions in Ni-MOF-74 are fabricated, [email protected] (M = Mn , Co , Cu , Zn , Al , Fe ), and [email protected] (M = Mn , Zn , Al , Fe ). The type and ratio of doping metal ions can be adjusted while the original topology is preserved. Read More

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Isolated-Oxygen-Vacancy Hardening in Lead-Free Piezoelectrics.

Adv Mater 2022 May 20:e2202558. Epub 2022 May 20.

Y.-X. Liu, H.-C. Thong, T. N. Nguyen, J.-W. Li, Prof. J.-F. Li, and Prof. K. Wang, State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, P. R. China.

Defect engineering is a well-established approach to customize the functionalities of perovskite oxides. In demanding high-power applications of piezoelectric materials; acceptor doping serves as the state-of-the-art hardening approach but inevitably deteriorates the electromechanical properties. Here; we propose a new hardening effect associated with the isolated oxygen vacancy for achieving well-balanced performances. Read More

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Machine Learning on a Robotic Platform for the Design of Polymer-Protein Hybrids.

Adv Mater 2022 May 20:e2201809. Epub 2022 May 20.

Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey, 08854, USA.

Polymer-protein hybrids are intriguing materials that can bolster protein stability in non-native environments, thereby enhancing their utility in diverse medicinal, commercial, and industrial applications. One stabilization strategy involves designing synthetic random copolymers with compositions attuned to the protein surface, but rational design is complicated by a vast chemical and composition space. Here, a strategy is reported to design protein-stabilizing copolymers based on active machine learning, facilitated by automated material synthesis and characterization platforms. Read More

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Highly Potassiophilic Graphdiyne Skeletons Decorated with Cu Quantum Dots Enable Dendrite-Free Potassium Metal Anodes.

Adv Mater 2022 May 20:e2202685. Epub 2022 May 20.

Beijing Graphene Institute, Beijing, 100095, P. R. China.

Employing Al foil current collector at the potassium anode side is an ideal choice to entail low-cost and high-energy potassium metal battery (PMB). Nevertheless, the poor affinity between potassium and planar Al can cause uneven K plating/stripping and hence undermined anode performance, which remains a significant challenge to be addressed. Herein, we propose a nitrogen-doped [email protected] ([email protected]) modified Al current collector affording potassiophilic properties that simultaneously suppresses the dendrite growth and prolongs the lifespan of K anodes. Read More

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Compact modeling technology for the simulation of integrated circuits based on graphene field-effect transistors.

Adv Mater 2022 May 20:e2201691. Epub 2022 May 20.

Departament d'Enginyeria Electrònica, Escola d'Enginyeria, Universitat Autònoma de Barcelona, Bellaterra, 08193, Spain.

In this study, we report the progress made towards the definition of a modular compact modeling technology for graphene field-effect transistors (GFET) that enables the electrical analysis of arbitrary GFET-based integrated circuits. A set of primary models embracing the main physical principles defines the ideal GFET response under DC, transient (time domain), AC (frequency domain), and noise (frequency domain) analysis. Other set of secondary models accounts for the GFET non-idealities, such as extrinsic-, short-channel-, trapping/detrapping-, self-heating-, and non-quasi static-effects, which could have a significant impact under static and/or dynamic operation. Read More

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Two-dimensional transition metal dichalcogenide with increased entropy for piezoelectric electronics.

Adv Mater 2022 May 19:e2201630. Epub 2022 May 19.

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China.

Piezoelectricity in two-dimensional (2D) transition metal dichalcogenides (TMDs) has attracted considerable interest because of their excellent flexibility and high piezoelectric coefficient compared to the conventional piezoelectric bulk materials. However, the ability to regulate the piezoelectric properties is limited because the entropy is constant for certain binary TMDs other than multielement ones. Herein, in order to increase the entropy, the ternary TMDs alloy, Mo W S with different W concentrations, is synthesized. Read More

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Dual Ligands Strategy to Regulate the Nucleation and Growth of Lead Chromate Photoanode for Photoelectrochemical Water Splitting.

Adv Mater 2022 May 19:e2110610. Epub 2022 May 19.

State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, P. R. China.

Photoelectrochemical (PEC) water splitting for renewable hydrogen production has been regarded as a promising solution to utilize solar energy. However, most of the photoelectrodes still suffer from poor film quality and poor charge separation properties, mainly owing to the possible formation of detrimental defects including microcracks and grain boundaries. Herein, we developed a molecular coordination engineering strategy by employing acetylacetone (Acac) and polyethylene glycol (PEG) dual ligands to regulate the nucleation and crystal growth of lead chromate (PbCrO ) photoanode, resulting in the formation of a high-quality film with large grain size, well-stitched grain boundaries and reduced oxygen vacancies defects. Read More

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High Performance Narrowband Pure-red OLEDs with External Quantum Efficiencies up to 36.1% and Ultra-low Efficiency Roll-off.

Adv Mater 2022 May 19:e2201442. Epub 2022 May 19.

Shenzhen Key Laboratory of New Information Display and Storage Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, PR China.

High color-purity blue and green organic light-emitting diodes (OLEDs) have been resolved thanks to the development of B/N-based polycyclic multiple resonance (MR) emitters. However, due to the derivatization limit of B/N polycyclic structures, the design of red MR emitters remains challenging. Herein, we report a series of novel red MR emitters by para-positioning N-π-N, O-π-O, B-π-B pairs onto a benzene ring to construct a MR central core. Read More

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Molecular-Level Methylcellulose/MXene Hybrids with Greatly Enhanced Electrochemical Actuation.

Adv Mater 2022 May 18:e2200660. Epub 2022 May 18.

School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.

Ti C T MXene film is promising for electrochemical actuators due to its high electrical conductivity and volumetric capacitance. However, its actuation performance is limited by the slow ion diffusion through the film and poor mechanical property in aqueous electrolytes. Here, molecular-level methylcellulose/MXene hybrid films are assembled with obviously enlarged layer distance, improved wet strength and ambient stability. Read More

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Mesopore-rich Fe-N-C catalyst with FeN -O-NC Single Atom Sites Delivers Remarkable Oxygen Reduction Reaction Performance in Alkaline Media.

Adv Mater 2022 May 18:e2202544. Epub 2022 May 18.

School of Chemical Sciences, The University of Auckland, Auckland, 1142, New Zealand.

Fe-N-C catalysts offer excellent performance for the oxygen reduction reaction (ORR) in alkaline media. With a view towards boosting the intrinsic ORR activity of Fe single atom sites in Fe-N-C catalysts, fine-tuning the local coordination of Fe sites to optimize the binding energies of ORR intermediates is imperative. Here we report the successful synthesis of a porous FeN -O-NCR electrocatalyst rich in catalytically accessible FeN -O sites (wherein the Fe single atoms are coordinated to four in-plane nitrogen atoms and one subsurface axial oxygen atom) supported on N-doped carbon nanorods (NCR). Read More

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A Bionic Interface to Suppressing the Coffee-ring Effect for Reliable and Flexible Perovskite Modules with a near 90% Yield Rate.

Adv Mater 2022 May 18:e2201840. Epub 2022 May 18.

College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, China.

The inhomogeneity, poor interfacial contact and pin-holes caused by the coffee-ring effect severely affect the printing reliability of flexible perovskite solar cells (PSCs). Herein, inspired by the bio-glue of barnacles, a bionic interface layer (Bio-IL) of NiO /levodopa is introduced to suppress the coffee-ring effect during printing perovskite modules. The coordination effect of the sticky functional groups in Bio-IL can pinning the three-phase contact line and restrain the transport of perovskite colloidal particles during the printing and evaporation process. Read More

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Anode-Free Potassium Metal Battery Enabled by Directly Grown Graphene Modulated Aluminum Current Collector.

Adv Mater 2022 May 18:e2202902. Epub 2022 May 18.

College of Energy, Soochow Institute for Energy and Materials Innovations, Light Industry Institute of Electrochemical Power Sources, Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, P. R. China.

Potassium (K) metal batteries have emerged as a promising energy-storage device owing to abundant K resources. An anode-free architecture that bypasses the need for anode host materials can deliver an elevated energy density. However, the poor efficiency of K plating/stripping on potassiophobic anode current collectors results in rapid K inventory loss and a short cycle life. Read More

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Dangling Octahedra Enable Edge States in 2D Lead Halide Perovskites.

Adv Mater 2022 May 18:e2201666. Epub 2022 May 18.

School of Materials Science and Engineering, Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin, 300350, China.

The structural reconstruction at the crystal layer edges of 2D lead halide perovskites (LHPs) leads to unique edge states (ES) which are manifested by prolonged carrier lifetime and reduced emission energy. These special ES could effectively enhance the optoelectronic performance of devices, but their intrinsic origin and working mechanism remain elusive. Here we demonstrate that the ES of a family of 2D Ruddlesden-Popper LHPs [BA CsPb Br , BA MAPb Br and BA MA Pb Br (BA = butylammonium; MA = methylammonium)] arise from the rotational symmetry elevation of the PbBr octahedra dangling at the crystal layer edges. Read More

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Responsive Hydrogel Based on Triggered Click Reaction for Liver Cancer.

Adv Mater 2022 May 18:e2201651. Epub 2022 May 18.

The Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province, Zhejiang Provincial People's Hospital (People's Hospital of Hangzhou Medical College), Hangzhou, Zhejiang, 310014, China.

Globally, liver cancer, which is one of the major cancers worldwide, has attracted the growing attention of technological researchers for its high mortality and limited treatment options. Hydrogel is a soft three-dimensional network material containing a large number of hydrophilic monomers. By adding moieties such as nitrobenzyl groups to the network structure of the cross-linked nanocomposite hydrogel, the click reaction improves the drug release efficiency in vivo will improve the survival rate and prolong the survival time of the liver cancer patients. Read More

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Giant Negative Magnetoresistance beyond Chiral Anomaly in Topological Material YCuAs.

Adv Mater 2022 May 18:e2201597. Epub 2022 May 18.

Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, and Key Laboratory of Strongly-Coupled Quantum Matter Physics, Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China.

Large negative magnetoresistance (MR) effect, which usually emerges in various magnetic systems, is a technologically important property for spintronics. Recently, the so-called "chiral anomaly" in topological semimetals offers an alternative to generate considerable negative MR effect without utilizing magnetism. However, it requires that the applied magnetic field must be strictly along the electric current direction, which sets a strong limit for practical applications. Read More

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Advances on thermal conductive epoxy-based composites as electronic packaging underfill materials - A review.

Adv Mater 2022 May 17:e2201023. Epub 2022 May 17.

Centre for Advanced Materials Technology (CAMT), School of Aerospace, Mechanical and Mechatronic Engineering J07, The University of Sydney, Sydney, NSW, 2006, Australia.

The integrated circuits (ICs) industry has been continuously producing micro-electronic components with ever higher integration level, packaging density and power density, which demand more stringent requirements for heat dissipation. Electronic packaging materials are used to pack these microelectronic components together, help to dissipate heat, redistribute stresses, and protect the whole system from the environment. They serve an important role in ensuring the performance and reliability of the electronic devices. Read More

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An Anode-free Zn-graphite Battery.

Adv Mater 2022 May 17:e2201957. Epub 2022 May 17.

Center for Advancing Electronics Dresden (cfaed) & Department of Chemistry and Food Chemistry, Technische Universität Dresden, Dresden, 01062, Germany.

Anode-free battery concept was proposed to pursue the aspiration of energy-dense, rechargeable metal batteries, but this has not been achieved with dual-ion batteries. Herein, we demonstrate the first anode-free Zn-graphite battery enabled by efficient Zn plating-stripping onto silver-coated Cu substrate. The silver coating guides uniform Zn deposition without dendrite formation or side reaction over a wide range of electrolyte concentrations, enabling the construction of anode-free Zn cells. Read More

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Thermally Activated Delayed Fluorescence Green OLED with 4500 hours Lifetime and 20% External Quantum Efficiency by Optimizing the Emission Zone Using A Single-Emission Spectrum Technique.

Adv Mater 2022 May 17:e2201409. Epub 2022 May 17.

i3-opera, 5-14 Kyudai-shimmachi, Nishi, Fukuoka, 819-0388, Japan.

Device optimization of LEDs targets the most efficient conversion of electrically injected charges into emitted light. The emission zone in an LED is where charges recombine and light is emitted from. It is believed that the emission zone is strongly linked to device efficiency and lifetime. Read More

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Terbium-doped and dual passivated γ-CsPb(I Br ) inorganic perovskite solar cells with improved air-thermal stability and high efficiency.

Adv Mater 2022 May 17:e2203204. Epub 2022 May 17.

Polymer Energy Materials Laboratory, School of Advanced Chemical Engineering, Chonnam National University, Gwangju-S, 61186, Korea.

Realizing photoactive and thermodynamically stable all-inorganic perovskite solar cells remains a challenging task within halide perovskite photovoltaic research.[11] Here, we report a dual strategy for realizing efficient inorganic mixed halide perovskite photovoltaic devices based on a terbium doped solar absorber, i.e. Read More

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Transparent, High-Performance and Stable Sb S Photoanode Enabled by Heterojunction Engineering with Conjugated Polycarbazole Frameworks for Unbiased Photoelectrochemical Overall Water Splitting Devices.

Adv Mater 2022 May 17:e2200723. Epub 2022 May 17.

Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China.

Developing low-cost, high-performance, and durable photoanodes is essential in solar-driven photoelectrochemical (PEC) energy conversion. Sb S is a low-bandgap (∼1.7 eV) n-type semiconductor with a maximum theoretical solar conversion efficiency of ∼28% for PEC water splitting. Read More

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Surface Oxygen Vacancies Confined by Ferroelectric Polarization for Tunable CO Oxidation Kinetics.

Adv Mater 2022 May 17:e2202072. Epub 2022 May 17.

State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.

Surface oxygen vacancies have been widely discussed to be crucial for tailoring the activity of various chemical reactions from CO, NO to water oxidation by using oxide-supported catalysts. However, the real role and potential function of surface oxygen vacancies in the reaction remains unclear because of their very short life-time. Here we report that surface oxygen vacancies can be well confined electrostatically for a polarization screening near the perimeter interface between Pt {111} nanocrystals and the negative polar surface (001) of ferroelectric PbTiO Strikingly, such a catalyst demonstrates a tunable catalytic CO oxidation kinetics from 200 °C to near room temperature by increasing O gas pressure, accompanied with the conversion curve from a hysteresis-free loop to hysteresis one. Read More

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General Synthesis and Solution Processing of Metal-Organic Framework Nanofibers.

Adv Mater 2022 May 17:e2202504. Epub 2022 May 17.

Department of Chemistry, Institute of Biomimetic Materials & Chemistry, Anhui Engineering Laboratory of Biomimetic Materials,  Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Institute of Energy, Hefei Comprehensive National Science Center, University of Science and Technology of China, Hefei, 230026, China.

By virtue of their extraordinarily high surface areas, ordered pore structures, various compositions and rich functionality, metal-organic frameworks (MOFs) are of great interest in diverse fields such as gas separation, sensing, catalysis, energy, environment science and biomedicine. However, the difficulty in processing MOF crystals and controlling the superstructure of MOFs is emerging as critical issue in their application. Herein, we report that a robust template, i. Read More

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Nanoscale antiferromagnetic domain imaging using full-field resonant x-ray magnetic diffraction microscopy.

Adv Mater 2022 May 17:e2200639. Epub 2022 May 17.

Department of Physics, Pohang University of Science and Technology, Pohang, 37673, South Korea.

The physical properties of magnetic materials frequently depend not only on the microscopic spin and electronic structures, but also on the structures of mesoscopic length scales that emerge, for instance, from domain formations, chemical and/or electronic phase separations. However, experimental access to such mesoscopic structures is currently limited, especially for antiferromagnets (AF) with net zero magnetizations. Here, we combine full-field microscopy and resonant magnetic x-ray diffraction to visualize AF domains of the spin-orbit Mott insulator Sr IrO over ∼0. Read More

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Conductive ink with circular life cycle for printed electronics.

Adv Mater 2022 May 17:e2202177. Epub 2022 May 17.

T. Xu, Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.

Electronic waste carries energetic costs and an environmental burden rivaling that of plastic waste due to the rarity and toxicity of the heavy metal components. We introduce recyclable conductive composites for printed circuits formulated with polycaprolactone (PCL), conductive fillers, and enzyme/protectant nanoclusters. Circuits can be printed with flexibility (breaking strain ∼80%) and conductivity (∼2. Read More

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Dendrimersome synthetic cells harbor cell division machinery of bacteria.

Adv Mater 2022 May 17:e2202364. Epub 2022 May 17.

DWI - Leibniz Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany.

The integration of active cell machinery with synthetic building blocks is the bridge towards developing synthetic cells with biological functions and beyond. Self-replication is one of the most important tasks of living systems, and various complex machineries exist to execute it. In E. Read More

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Open-Environment Tactile Sensing System: Towards Simple and Efficient Material Identification.

Adv Mater 2022 May 17:e2203073. Epub 2022 May 17.

Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China.

Robotic perception can have simple and effective sensing functions that are unreachable for humans using only the isolated tactile perception method, with the assistance of triboelectric nanogenerator (TENG). However, the reliability of triboelectric sensors remains a major challenge due to the inherent environmental limitations. Here, an intelligent tactile sensing system that combines TENG and deep learning technology is proposed. Read More

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