bluuebunny/crossref_metadata_2025_split huggingface dataset:
Enhancing Oxygen Reduction Activity and CO2 Tolerance by a Bismuth Doping Strategy for Solid Oxide Fuel Cell Cathodes
Authors: Jin Fangjun , Liu Xiaowei , Tian Yunfeng , Ling Yihan 
Published: March 2024

AbstractLayered perovskite related oxides, LnBaCo2O5+δ (Ln = rare‐earth element) are potential ceramic cathodes for intermediate temperature solid oxide fuel cells. Herein, a simple way to tune the performance of NdBaCo2O5+δ (NBC) perovskite as a cathode by doping the Co‐site with bismuth cation is reported. Compared with the parent oxide, the obtained stabilized double perovskites NdBaCo2−xBixO5+δ (x = 0.1 and 0.2) show a much improved electrocatalytic activity, achieving area‐specific resistance of 0.268, 0.107 and 0.152 Ω cm2 at 700 °C in air for NBC, x = 0.1, and 0.2, respectively. Density functional theory results demonstrate that bismuth doping effectively reduces the formation energy of oxygen vacancies. Moreover, the bismuth doping of NdBaCo2−xBixO5+δ cathode is much more robust against CO2 than that of NBC cathode. This work indicates that bismuth doping in the B‐site of LnBaCo2O5+δ may be a highly attractive strategy for the future development of cathode materials.
Biobased Thermoset Substrate for Flexible and Sustainable Organic Photovoltaics
Authors: Tian Jingfu , You Yang , Zhou Han , Li Haojie , Hu Lin , Tian Yaozhu , Xie Haibo , Xie Yuanpeng , Hu Xiaotian 
Published: March 2024

AbstractToward a sustainable development of the flexible electronics industry, the design and facile preparation of sustainable flexible substrates with satisfactory mechanical properties and transparency is still a challenge. Herein, taking structural advantages of biobased eugenol and vanillin, a polymerizable aromatic carbonate monomer with α,ω‐diene functionality (2E), and a robust aromatic acetal monomer with α,ω‐tetraene functionality (4E), are designed and prepared. Then, they are cross‐linked with pentaerythritol tetrakis(2‐mercaptoacetate) (4SH) via thiol‐ene click reaction to generate a series of ternary poly(thioether carbonate acetal) thermosets. It is found that the introduction of 4E allows the production of thiol‐ene thermosets with higher crosslink density, which can balance their mechanical, optical, and surface properties. In addition, the thermoset shows good resistance against various natural environmental conditions and can be decomposed into recyclable small molecules under harsher conditions (3 m NaOH, 80 °C). As a result, the optimal thermoset is well‐suited for the fabrication of flexible organic solar cells (OSCs), yielding a power conversion efficiency of 15.41%, which is superior to polyethylene terephthalate‐based OSC. The results provided significant insights for the design and preparation of sustainable polymer substrates for OSCs, even flexible electronics.
Ion‐Engineered Microcryogels via Osteogenesis‐Angiogenesis Coupling and Inflammation Reversing Augment Vascularized Bone Regeneration
Authors: Wang Yue , Wang Xinyu , Pang Yanyun , Li Xiaomin , Gao Chenyuan , Zhang Daixing , Li Guangyu , Yu Yingjie , Yang Xiaoping , Cai Qing 
Published: March 2024

AbstractNative bone inherently requires a balanced ionic microenvironment to maintain bone homeostasis. Hence, scaffolds designed for the sustained release of therapeutic ions into bone defects hold great promise for bone regeneration. Magnesium (Mg) and silicon (Si) are essential elements, which play crucial roles in the process of bone regeneration, impacting immunomodulation, angiogenesis, and osteogenesis. Herein, porous cryogel‐type organic–inorganic composite microspheres are developed as injectable microscaffolds (denoted as GMN). GMN enables sustained release of Mg/Si ions at an optimized ratio, achieving the most significant synergistic effect on vascularized bone regeneration. Various conditioned media are obtained to explore angiogenesis‐osteogenesis coupling, as well as the crosstalk between bone marrow mesenchymal stromal cells (BMSCs) and macrophages. Meanwhile, autocrine and paracrine effects simultaneously play synergistic modulating functions in determining cell fates under the guidance of Mg/Si ions and biofactors secreted by cells. Overall, the Mg/Si ion‐engineering microscaffolds create a conducive microenvironment to efficiently augment the regeneration of vascularized bone tissue in vivo, offering a versatile platform for tissue engineering.
Screening Spinel Oxide Supports for RuO2 to Boost Bifunctional Electrocatalysts for Advanced Zn–Air Batteries
Authors: Zou Xiaohong , Lu Qian , Wu Jie , Zhang Kouer , Tang Mingcong , Wu Baoxin , She Sixuan , Zhang Xiao , Shao Zongping , An Liang 
Published: March 2024

AbstractThe compositing strategy offers great potential in designing bifunctional oxygen electrocatalysts for Zn–air batteries. Recent reports reveal that the couple of RuO2, serving as a benchmark oxygen evolution reaction (OER) catalyst, with other oxygen reduction reaction (ORR) catalysts is a wise choice to build highly efficient bifunctional electrocatalysts. However, the design criteria for ORR and OER activities of RuO2‐based composite catalysts are still unclear. Herein, a series of transition metal (Fe, Co, Mn, and Ni)‐doped spinel oxides are designed to support RuO2 nanorods for exploring the reaction mechanism. Through advanced technology, it is considered that increasing the content and binding energy of Co3+ and enhancing the oxidation state of Ru4+ is an efficient strategy to promote ORR and OER activities for RuO2/Co‐based spinel oxide composite catalysts. It is found that coupling Mn‐doping Co3O4 (CMO) supports with RuO2 can induce the highest catalytic activities in ORR/OER and excellent performance in rechargeable Zn–air batteries. Operando electrochemical impedance spectroscopy and theoretical calculation further prove the synergistic effect between RuO2 and CMO supports originated from the oxygen overflow to overcome the large barrier for oxygen desorption on RuO2 during OER and oxygen adsorption on CMO supports during ORR.
Constructing Covalent Organic Polymers through Dative B─N Bonds: Synthesis, Single Crystal Structures, and Physical Properties
Authors: Wang Xin , Zhang Lei , Wang Xiang , Cheng Tianqi , Xue Miaomiao , Dong Qiang , Peng Yungkang , Zhang Qichun 
Published: March 2024

AbstractGrowing single crystals of covalent organic polymers (COPs) for single‐crystal X‐ray diffraction analysis is very important and highly desirable because such strategy provides a deep understanding of crystallization kinetics and the structure‐property relationship of COPs. Based on the strategy that dynamic covalent bonds can allow self‐correction of structures during crystal growth, single crystals of two COPs (CityU‐15 and CityU‐16) based on dative boron‐nitrogen (B─N) bonds have been successfully obtained. Detailly, tetra(4‐pyridyl)tetrathiafulvalene (TTF(py)4) and tetra(4‐pyridyl)porphine (TPYP) are employed as N‐donor ligands to react with 1,4‐bis(benzodioxaborole) benzene to prepare single crystals of COPs, named as CityU‐15 and CityU‐16, respectively. CityU‐16 exhibits enhanced stability compared to CityU‐15, and the size of CityU‐16 single crystals can reach up to 0.7 cm. CityU‐15 shows good recyclability and reveals noticeable photosensitivity upon iodine doping. After treatment with iodine, both crystals display obvious color changes. Specially, the device based on I2‐treated CityU‐15 exhibits excellent low‐voltage operation and low energy consumption of 3.3 fJ, facilitating the development of artificial vision. This work highlights the successful introduction of functional groups into B‐N‐containing COPs, opening up new avenues for expanding their applications.
Design of a Novel Delivery Efficiency Feedback System for Biphasic Dissolving Microarray Patches Based on Poly(Lactic Acid) and Moisture‐Indicating Silica
Authors: Li Huanhuan , Anjani Qonita Kurnia , Hutton Aaron R. J. , Paris Juan Luis , Moreno‐Castellanos Natalia , Himawan Achmad , Larrañeta Eneko , Donnelly Ryan F. 
Published: March 2024

AbstractDissolving microarray patches (DMAPs) represent an innovative approach to minimally invasive transdermal drug delivery, demonstrating efficacy in delivering both small and large therapeutic molecules. However, concerns raised in end‐user surveys have hindered their commercialization efforts. One prevalent issue highlighted in these surveys is the lack of clear indicators for successful patch insertion and removal time. To address this challenge, a color‐change‐based feedback system is devised, which confirms the insertion and dissolution of DMAPs, aiming to mitigate the aforementioned problems. The approach combines hydrophilic needles containing model drugs (fluorescein sodium and fluorescein isothiocyanate (FITC)‐dextran) with a hydrophobic poly(lactic acid) baseplate infused with moisture‐sensitive silica gel particles. The successful insertion and subsequent complete dissolution of the needle shaft are indicated by the progressive color change of crystal violet encapsulated in the silica. Notably, distinct color alterations on the baseplate, observed 30 min and 1 h after insertion for FITC‐dextran and fluorescein sodium DMAPs respectively, signal the full dissolution of the needles, confirming the complete cargo delivery and enabling timely patch removal. This innovative feedback system offers a practical solution for addressing end‐user concerns and may significantly contribute to the successful commercialization of DMAPs by providing a visualized drug delivery method.
Unveiling the Synergistic Role of Frustrated Lewis Pairs in Carbon‐Encapsulated Ni/NiOx Photothermal Cocatalyst for Enhanced Photocatalytic Hydrogen Production
Authors: Yang Zhi , Huang Taiyu , Li Meng , Wang Xudong , Zhou Xiaosong , Yang Siyuan , Gao Qiongzhi , Cai Xin , Liu Yingju , Fang Yueping , Wang Yu , Zhang Shanqing , Zhang Shengsen 
Published: March 2024

AbstractThe development of high‐density and closely spaced frustrated Lewis pairs (FLPs) is crucial for enhancing catalyst activity and accelerating reaction rates. However, constructing efficient FLPs by breaking classical Lewis bonds poses a significant challenge. Here, this work has made a pivotal discovery regarding the Jahn–Teller effect during the formation of grain boundaries in carbon‐encapsulated Ni/NiOx (Ni/NiOx@C). This effect facilitates the formation of high‐density O (VO) and Ni (VNi) vacancy sites with different charge polarities, specifically FLP‐VO‐C basic sites and FLP‐VNi‐C acidic sites. The synergistic interaction between FLP‐VO‐C and FLP‐VNi‐C sites not only reduces energy barriers for water adsorption and splitting, but also induces a strong photothermal effect. This mutually reinforcing effect contributes to the exceptional performance of Ni/NiOx@C as a cocatalyst in photothermal‐assisted photocatalytic hydrogen production. Notably, the Ni/NiOx@C/g‐C3N4 (NOCC) composite photocatalyst exhibits remarkable hydrogen production activity with a rate of 10.7 mmol g−1 h−1, surpassing that of the Pt cocatalyst by 1.76 times. Moreover, the NOCC achieves an impressive apparent quantum yield of 40.78% at a wavelength of 380 nm. This work paves the way for designing novel defect‐state multiphase cocatalysts with high‐density and adjacent FLP sites, which hold promise for enhancing various catalytic reactions.
Full‐Length Single Protein Molecules Tracking and Counting in Thin Silicon Channels
Authors: Ohayon Shilo , Taib Liran , Verma Navneet Chandra , Iarossi Marzia , Bhattacharya Ivy , Marom Barak , Huttner Diana , Meller Amit 
Published: March 2024

AbstractEmerging single‐molecule protein sensing techniques are ushering in a transformative era in biomedical research. Nevertheless, challenges persist in realizing ultra‐fast full‐length protein sensing, including loss of molecular integrity due to protein fragmentation, biases introduced by antibodies affinity, identification of proteoforms, and low throughputs. Here, a single‐molecule method for parallel protein separation and tracking is introduced, yielding multi‐dimensional molecular properties used for their identification. Proteins are tagged by chemo‐selective dual amino‐acid specific labels and are electrophoretically separated by their mass/charge in custom‐designed thin silicon channel with subwavelength height. This approach allows analysis of thousands of individual proteins within a few minutes by tracking their motion during the migration. The power of the method is demonstrated by quantifying a cytokine panel for host‐response discrimination between viral and bacterial infections. Moreover, it is shown that two clinically‐relevant splice isoforms of Vascular endothelial growth factor (VEGF) can be accurately quantified from human serum samples. Being non‐destructive and compatible with full‐length intact proteins, this method opens up ways for antibody‐free single‐protein molecule quantification.
3D Printing Bio‐Inspired Micro Soft Robot with Programming Magnetic Elastic Composites
Authors: Peng Zilong , Zhang Hao , Wang Mengjie , Zhang Shuailong , Jiang Yifan , Li Yinan , Zhu Xiaoyang , Zhang Guangming , Niu Geng , Zhang Jia , He Jiankang , Lan Hongbo 
Published: March 2024

AbstractBio‐inspired micro soft robots mimic biologically specific body structures and movement mechanisms by utilizing bionic principles. Because of its soft body, it can adapt to complex external environments. However, the existing polymer material system is single and the fabrication process is limited. How to further reduce soft robot size has become a key issue. In this work, a Programming Magnetic Elastic Composites (PMEC) is proposed for 3D printing to manufacture micro soft robots. The PMEC has the advantage of changing the direction of the internal magnetic field in response to changes in the external magnetic field. A Microsoft robot is designed and fabricated using PMEC inspired by an inchworm. Numerical simulations are also used to study the effect of soft robot size parameters on local stresses and optimize the structure. The results show that the microscale soft robot can crawl with a load of 2 times its weight at a speed of 6.67 mm s−1, crawl on slopes from 0° to 90°, and crawl over obstacles with a maximum height of 7 mm. In addition, active adaptation of soft robots to complex tunnel models based on external stimuli is achieved by magnetic field control.
Flexible Supercapacitor Integrated Systems
Authors: He Aiqi , He Jiangfeng , Cao Lingyun , Chen Jiaxiang , Cheng Bin , Ma Rui , Ding Yi , Yang Guowei , Yi Fang 
Published: March 2024

AbstractThere is a pressing need for flexible integrated systems owing to the swift progress of flexible electronics. Apart from flexibility, flexible supercapacitor (FSC) integrated systems exhibit certain characteristics like rapid charge–discharge rates, high power density, and excellent cycling stability, which makes them a promising candidate to serve as a vital component in flexible electronics. In this context, an in‐depth overview of recent progress in FSC‐integrated systems, including their design of structure, materials, fabrication techniques, and applications, is offered. On the basis of the current progress, the existing challenges and future prospects are also outlined and discussed.
Chemical Vapor Deposition Growth of 2D Ferroelectric Materials for Device Applications
Authors: Wang Liyao , Sun Guodong , Yuan Shuoguo 
Published: March 2024

Abstract2D ferroelectric materials have garnered extensive attention for promising applications in next‐generation electronic devices, which provides a platform to explore ferroelectricity without the critical thickness constraint of traditional perovskite oxide‐based ferroelectric materials. Recent studies have shown that chemical vapor deposition (CVD) can synthesis the large‐area 2D ferroelectric materials, making the 2D ferroelectric materials to be compatible with scalable semiconductor devices. In this Review, the CVD‐grown 2D ferroelectric materials are summarized in terms of materials, properties to devices application view. First, the synthesis strategy and recent advances of the CVD growth of 2D ferroelectric materials are highlighted in the aspects of diverse groups of 2D materials. Second, the recent experimental progress of 2D ferroelectric devices is introduced, and the potential applications of 2D ferroelectric devices are discussed. The availability of the CVD‐grown 2D ferroelectrics provides an abundant playground for not only deep studying the ferroelectric properties, but also conceiving various device applications. Lastly, the perspectives are provided to address the current challenges in terms of materials design, physics mechanism, device, and multifunctional application.
Human Fibroblast‐Derived Matrix Hydrogel Accelerates Regenerative Wound Remodeling Through the Interactions with Macrophages
Authors: Savitri Cininta , Ha Sang Su , Kwon Jae Won , Kim Sung Hoon , Kim Young‐Min , Park Hyun Mee , Kwon Haejin , Ji Mi Jung , Park Kwideok 
Published: March 2024

AbstractHerein, a novel extracellular matrix (ECM) hydrogel is proposed fabricated solely from decellularized, human fibroblast‐derived matrix (FDM) toward advanced wound healing. This FDM‐gel is physically very stable and viscoelastic, while preserving the natural ECM diversity and various bioactive factors. Subcutaneously transplanted FDM‐gel provided a permissive environment for innate immune cells infiltration. Compared to collagen hydrogel, excellent wound healing indications of FDM‐gel treated in the full‐thickness wounds are noticed, particularly hair follicle formation via highly upregulated β‐catenin. Sequential analysis of the regenerated wound tissues disclosed that FDM‐gel significantly alleviated pro‐inflammatory cytokine and promoted M2‐like macrophages, along with significantly elevated vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) level. A mechanistic study demonstrated that macrophages‐FDM interactions through cell surface integrins α5β1 and α1β1 resulted in significant production of VEGF and bFGF, increased Akt phosphorylation, and upregulated matrix metalloproteinase‐9 activity. Interestingly, blocking such interactions using specific inhibitors (ATN161 for α5β1 and obtustatin for α1β1) negatively affected those pro‐healing growth factors secretion. Macrophages depletion animal model significantly attenuated the healing effect of FDM‐gel. This study demonstrates that the FDM‐gel is an excellent immunomodulatory material that is permissive for host cells infiltration, resorbable with time, and interactive with macrophages, where it thus enables regenerative matrix remodeling toward a complete wound healing.
Nitrogen‐Vacancy‐Rich VN Clusters Embedded in Carbon Matrix for High‐Performance Zinc Ion Batteries
Authors: Bai Youcun , Luo Liang , Song Wenliang , Man Shuaishuai , Zhang Heng , Li Chang Ming 
Published: March 2024

AbstractVanadium nitride (VN) is a potential cathode material with high capacity and high energy density for aqueous zinc batteries (AZIBs). However, the slow kinetics resulting from the strong electrostatic interaction of the electrode materials with zinc ions is a major challenge for fast storage. Here, VN clusters with nitrogen‐vacancy embedded in carbon (C) (Nv‐VN/C‐SS‐2) are prepared for the first time to improve the slow reaction kinetics. The nitrogen vacancies can effectively accelerate the reaction kinetics, reduce the electrochemical polarization, and improve the performance. The density functional theory (DFT) calculations also prove that the rapid adsorption and desorption of zinc ions on Nv‐VN/C‐SS‐2 can release more electrons to the delocalized electron cloud of the material, thus adding more active sites. The Nv‐VN/C‐SS‐2 exhibits a specific capacity and outstanding cycle life. Meanwhile, the quasi‐solid‐state battery exhibits a high capacity of 186.5 mAh g−1, ultra‐high energy density of 278.9 Wh kg−1, and a high power density of 2375.1 W kg−1 at 2.5 A g−1, showing excellent electrochemical performance. This work provides a meaningful reference value for improving the comprehensive electrochemical performance of VN through interface engineering.
Revealing the Potential and Challenges of High‐Entropy Layered Cathodes for Sodium‐Based Energy Storage
Authors: Gao Hong , Li Jiayi , Zhang Fan , Li Congcong , Xiao Jun , Nie Xinming , Zhang Guilai , Xiao Yang , Zhang Dingyi , Guo Xin , Wang Yong , Kang Yong‐Mook , Wang Guoxiu , Liu Hao 
Published: March 2024

AbstractSodium‐ion batteries (SIBs) reflect a strategic move for scalable and sustainable energy storage. The focus on high‐entropy (HE) cathode materials, particularly layered oxides, has ignited scientific interest due to the unique characteristics and effects to tackle their shortcomings, such as inferior structural stability, sluggish reaction kinetics, severe Jahn‐Teller effects induced lattice distortion, and poor oxygen reversibility at high voltage. This review focuses on high‐entropy oxide materials, highlighting their fundamentals, design principles, and application in layered oxide cathodes for SIBs. It delves into the growth mechanism, composition‐properties correlations, and the functional roles of high‐entropy design in enhancing the performance of layered oxide cathodes. Furthermore, it furnishes a comprehensive survey of recent advancements and persisting challenges within the domain of layered high‐entropy cathode materials, as well as offers insights into potential future research directions in line with the current state of knowledge.
After the fire: An ecological, phenomenological exploration of resilience‐building following the Fuego volcanic eruption in Guatemala
Authors: Oldfield Jeremy , Stevenson Andrew 
Published: March 2024

AbstractCombining ecological resilience theory with a phenomenological epistemology, we explored experiential, social, and cultural factors mediating resilience‐building with participants from a village destroyed by the 2018 Fuego volcanic eruption in Guatemala. The purpose of the study is to find out what strategies displaced families and communities employ for living through the aftermath of a volcano eruption and for building psychological resilience. We conducted semistructured interviews with nine survivors of the Fuego eruption, now relocated and coping with the loss of community and family members killed in the disaster. Interpretive phenomenological analysis was used to analyze transcripts. The analysis produced four main themes: (i) individual and collective challenges, (ii) social support and protection, (iii) faith and culturally endorsed belief, and (iv) looking to the future. As well as learning more about how a community faced challenges presented by a volcano eruption, the current study has a degree of transferability, with implications for understanding how other communities experience and cope with such events.