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? 2023 Elsevier LtdThe next-generation capacitors have placed higher requirements on energy-storage dielectrics, such as high temperature, high frequency and high voltage. Perovskite dielectrics possess various kinds of polar stru...
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? 2023 Elsevier LtdThe next-generation capacitors have placed higher requirements on energy-storage dielectrics, such as high temperature, high frequency and high voltage. Perovskite dielectrics possess various kinds of polar structures, such as ferroelectric domains, polar nano-regions (PNRs), and anti-polar structure as well, which exhibit various responses to external stimulations (temperature, electric field, mechanical loadings). Its design inspires development strategies to improve their energy-storage properties for capacitors involving chemical composition, fabrication process, computer simulation, and even measurement strategies for validation. In this article, we reviewed the recent design strategies and the perovskite dielectrics (covering linear, ferroelectric, relaxor ferroelectric, anti-ferroelectric, even some composite materials, such as glass-ceramics and polymer). This review spans from the atomic to millimeter-scale strategies of property optimization to provide accurate and comprehensive information for researchers in this field. Some novel proposals for overcoming the barriers between materials and properties are presented to accelerate the applications of the next-generation capacitors. Therefore, this review should help to identify the best approach for transferring the new perovskite dielectrics into next-generation capacitor applications.
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? 2022 Elsevier B.V.As an important branch of functional materials, ferroic materials, especially ferroelectrics have attracted increasing attention in decades. Because of the rising demand in industry, performances on single-phas...
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? 2022 Elsevier B.V.As an important branch of functional materials, ferroic materials, especially ferroelectrics have attracted increasing attention in decades. Because of the rising demand in industry, performances on single-phase-based ferroelectric materials seems to meet the bottleneck, studies on composites are becoming urgent now. Motivated by this, structure designing of composite materials was considered as a key factor for pursing better properties, yielding fruitful research work. Among those work, interfacial parts between different phases was always reported to play significant roles in such composite ferroelectrics, and the authors summed them up as the strategy of INTERFACE ENGINEERING. Being different from traditional reviews, which mostly introduce materials with certain system or function, this one focuses more on the utilizing of interfaces in different states of ferroelectrics such as: Tuning magnetoelectric coupling coefficient by terminated layer in epitaxial thin films; broadening Curie Temperature range by inducing interfacial stain; enhancing dielectric tunability by forming topological structures; increasing electrical breakdown strength introducing artificial interfaces, etc. Besides, deeper mechanisms of such performance optimizations were also digged out and explained, hoping to offer new ideas for exploiting the next-generation electronic materials and devices.
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? 2022 Elsevier B.V.The inflammatory bowel disease (IBD) is incurable, chronic, recrudescent disorders in the inflamed intestines. Current clinic treatments are challenged by systemic exposure-induced severe side effects, ineffici...
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? 2022 Elsevier B.V.The inflammatory bowel disease (IBD) is incurable, chronic, recrudescent disorders in the inflamed intestines. Current clinic treatments are challenged by systemic exposure-induced severe side effects, inefficiency after long-term treatment, and increased risks of infection and malignancy due to immunosuppression. Fortunately, naturally bioactive small molecules, reactive oxygen species scavengers (or antioxidants), and gut microbiota modulators have emerged as promising candidates for the IBD treatment. Polymeric systems have been engineered as a delivery vehicle to improve the bioavailability and efficacy of these therapeutic agents through targeting the mucosa and enhancing intestinal adhesion and retention, and reduce their systemic toxicity. Herein we survey polymer-derived drug delivery systems for combating the IBD. Advanced delivery technologies, therapeutic intervention strategies, and the principles for the construction of hierarchical, mucosa-targeting, and bioresponsive systems are elaborated, providing insights into design and development of from-bench-to-bedside drug delivery polymeric systems for the IBD treatment.
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? 2022 Elsevier LtdTo better grasp the latest research on distributed optical fiber sensing (DOFS), this paper has screened 861 relevant scientific articles from Web of Science Core Collection database from 2010 to 2021 employing ...
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? 2022 Elsevier LtdTo better grasp the latest research on distributed optical fiber sensing (DOFS), this paper has screened 861 relevant scientific articles from Web of Science Core Collection database from 2010 to 2021 employing CiteSpace to conduct mapping knowledge domains, which is the first time to analyze from the perspective of bibliometrics in the domain. The findings indicate that publications are in a stage of rapid development, involving a wide range of fields. The paper reveals how the research topics have changed over time and investigates the current research hotspot. The paper presents the most prolific institutions and prominent authors of DOFS signal processing and pattern recognition. Moreover, this paper also reports some key literature with high co-citation intensity. It highlights the research characteristic of application fields, feature extraction, and model methods according to the profound information in the mapping knowledge domains. Finally, the future research trend of the domain is prospected.
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? 2023The Z-scheme heterojunction has demonstrated significant potential for promoting photogenerated carrier separation. However, the rational design of all-solid Z-scheme heterojunctions catalysts and the controversies about car...
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? 2023The Z-scheme heterojunction has demonstrated significant potential for promoting photogenerated carrier separation. However, the rational design of all-solid Z-scheme heterojunctions catalysts and the controversies about carrier transfer path of direct Z-scheme heterojunctions catalysts face various challenges. Herein, a novel heterojunction, Cu2O@V-CN (octa), was fabricated using V-CN (carbon nitride with nitrogen-rich vacancies) in-situ electrostatic self-wrapping Cu2O octahedra. Density functional theory (DFT) calculations revealed that the separation of carriers across the Cu2O@V-CN (octa) heterointerface was directly mapped to the Z-scheme mechanism compared to Cu2O/V-CN (sphere). This is because the Cu2O octahedra expose more highly active (1 1 1) lattice planes with more terminal Cu atoms and V-CN with abundant nitrogen vacancies to form delocalized electronic structures like electronic reservoirs. This facilitates the wrapping of Cu2O octahedra by V-CN and protects their stability via tighter interfacial contact, thus enhancing the tunneling of carriers for rapid photocatalytic sterilization. These findings provide novel approaches for designing high-efficiency Cu2O-based photocatalytic antifoulants for practical applications.
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? 2022 Elsevier Ltd and Techna Group S.r.l.Ceria is widely used in industrial fields due to its unique chemical properties. In this work, a series of CeO2 particles with controllable morphology, size, and defect concentration were...
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? 2022 Elsevier Ltd and Techna Group S.r.l.Ceria is widely used in industrial fields due to its unique chemical properties. In this work, a series of CeO2 particles with controllable morphology, size, and defect concentration were obtained by a simple molten salt method. The adjustment of temperature and molten salt concentration has a considerable effect on the morphology and particle size of the final CeO2 particles while prolonging the holding time has little effect. Ion doping and reducing atmosphere calcination were used to regulate the defect concentration to improve the chemical activity of CeO2 particles. SEM results show that the morphology of CeO2 particles transforms from sphere to octahedron under the two treatments. The Rietveld refinement results and the XPS spectra indicate that increasing calcination temperature, reducing atmosphere calcination and ion doping are beneficial to improving the oxygen vacancies and Ce3+ concentration of CeO2 samples, which are the reason for enhancing the photocatalytic activity of the samples. Moreover, the oriented attachment, agglomeration and merging of crystals formed by the decomposition of cerium precursors are the key to the growth of CeO2 particles. Aggregates with exposed low-energy planes merge directly to form particles of various morphologies to maintain their own low energy.
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