bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Laminated Strategy Enabled Sustainable Tactile Array with Ultra‐Stable Sensory Augmentation
Authors: Hao Sanwei , Wang Wenqi , Ma Chao , Li Xin , Liu Xidie , Wang Yicong , Xue Zhimin , Xu Feng , Yang Jun 
Published: August 2024

AbstractThe sustainable tactile electronics demonstrates huge potential in mimicking the functionality of human skin and satisfies with an eco‐friendly concept. However, on the premise of successfully introducing natural materials, such electronics are still not sufficient for improving the fatigue threshold in high‐frequency sensing scenarios. Here an eco‐ and user‐friendly cellulose integrated tactile array (CITA) is introduced that relies on laminated hierarchical architecture (LAHA) for alleviating the notorious structural vulnerability toward long‐term haptic evaluation. By cross‐validation with conventional bulky configuration, finite element simulation unveils that the LAHA leverages compact laminated adjacent layer for dramatically facilitating in‐plane stress distribution for diminishing the interfacial stress concentration, thus affords prolonged and reliable sensory augmentation. The CITA wireless monitoring system offers impeccable real‐time spatiotemporal haptic patterns on multi‐user interfaces and can substantially promote a record‐high durability (150000 cycles), showcasing low interfacial contact impedance (1.78 ± 0.4 ohm, 1 kHz), remarkably channel uniformity (97.2%), unparalleled sensitivity (12944 kPa−1), and sensing‐robustness against perturbations (e.g., humidity, temperature, and bending). It is envisioned that the proposed CITA system will open up new avenues for sustainable tactile electronics in continuous health surveillance.
Surface Active‐Site Engineering of Low‐Noble‐Metal‐Alloyed Metallic Glass Catalyst for Boosting Water Electrolysis
Authors: Zhang Yanan , Li Rui , Wang Xu , Guo Qi , Zhang Qiqin , He Yi , Liu Weihong , Li Zhibin , Liu Xiongjun , Lu Zhaoping 
Published: August 2024

AbstractThe development of efficient, robust, and cost‐effective electrocatalysts remains a significant challenge for practical water electrolysis. Here, a metallic glass (MG)‐based catalyst with surface‐enriched Ir and Pt‐alloyed active sites, demonstrating superior electrocatalytic performance, is reported. The dealloyed catalyst, characterized by an Ir and Pt‐rich honeycombed nanoporous surface and an interior flexible MG substrate, can directly serve as a bifunctional electrode, enabling efficient hydrogen and oxygen evolution reactions with low overpotentials of 19 and 223 mV to achieve a current density of 10 mA cm−2, respectively. Notably, the mass activity of the catalyst surpasses that of commercial Pt/C and Ir/C catalysts by 13.9 and 16.5 times, respectively. Additionally, the catalyst exhibits exceptional stability with negligible activity decay even under an ampere‐level current density (i.e., ≥1 A cm−2). Theoretical calculations reveal the optimization of atomic configuration and regulation of electronic interactions through lattice strain induced by the co‐alloying of Ir and Pt, contributing to superior electrocatalytic performance. Furthermore, the unique honeycombed nanoporous architecture, shaped by the surface migration and enrichment of the noble metals, offers abundant active sites for accelerating the electrocatalytic reactions. This work presents a novel approach to cost‐effectively design high‐performance alloy catalysts by engineering surface catalytically active sites.
High Fire‐Safety and Multifunctional Eutectogel for Flexible Quasi‐Solid‐State Supercapacitors
Authors: Zeng Qingtao , Lai Xuejun , Li Hongqiang , Chen Zhonghua , Zeng Xingrong , Zhang Liqun 
Published: August 2024

AbstractThe preparation of high‐performance and fire‐safe electrolytes for flexible quasi‐solid‐state supercapacitors is challenging. In this work, a novel fire‐safe and multifunctional deep eutectic solvent gel (DESG) is fabricated using acrylic acid and urea as hydrogen bond donors and choline chloride as a hydrogen bond acceptor. DESG shows a high ionic conductivity (0.552 S m−1), good electrochemical performance (specific capacitance: 106.8 F g−1), and a wide operating temperature range (−20–90 °C), being a promising candidate for flexible solid‐state supercapacitors. Furthermore, it exhibits a good thermoelectric conversion capability (Seebeck coefficient: 1.56 mV K−1), being ideal for thermoelectric capacitors and fire‐warning sensors. The prepared DESG rapidly self‐extinguishes after removal from fire, reaching a limiting oxygen index value of 38.0% and demonstrating its excellent flame retardancy. In addition, DESG has a good self‐healing performance (healing efficiency of 84.3%). The work provides new insights into the preparation and application of high fire‐safety and multifunctional eutectogels for flexible quasi‐solid‐state supercapacitors.
A Microfluidic 3D‐Tumor‐Spheroid Model for the Evaluation of Targeted Therapies from Angiogenesis‐Related Cytokines at the Single Spheroid Level
Authors: Liu Mengqi , Wang Yihe , Wang Chao , Li Ping , Qiu Jiaoyan , Yang Ningkai , Sun Mingyuan , Han Lin 
Published: August 2024

AbstractAngiogenesis is a key player in drug resistance to targeted therapies for breast cancer. The average expression of angiogenesis‐related cytokines is widely associated with the treatments of target therapies for a population of cells or spheroids, overlooking the distinct responses for individuals. In this work, a highly integrated microfluidic platform is developed for the generation of monodisperse multicellular tumor spheroids (MTSs), drug treatments, and the measurement of cytokines for individual MTSs in a single chip. The platform allows the correlation evaluation between cytokine secretion and drug treatment at the level of individual spheroids. For validation, quantities of six representative proangiogenic cytokines are tested against treatments with four model drugs at varying times and concentrations. By applying a linear regression model, significant correlations are established between cytokine secretion and the treated drug concentration for individual spheroids. The proposed platform provides a high‐throughput method for the investigation of the molecular mechanism of the cytokine response to targeted therapies and paves the way for future drug screening using predictive regression models at the single‐spheroid level.
A Small‐Molecule NIR‐II Probe for the Diagnosis of Hemorrhagic Diseases
Authors: Li Jinwei , Xu Tongtong , Chen Jiabei , He Xiaoyan , Ma Renwei , Lu Xiuhong , Yuan Jialu , Yao Minghua , Tang Yaohui , Li Jianfeng 
Published: August 2024

AbstractNumerous hemorrhagic disorders, particularly those presenting deep hemorrhage, pose diagnostic challenges, often leading to delayed treatment and severe outcomes. Near‐infrared (NIR)‐II fluorescence imaging offers advantages such as deep tissue penetration, real‐time visualization, and a high signal‐to‐background ratio, making it highly suitable for diagnosing hemorrhagic diseases. In this study, an NIR‐II fluorescent probe LJ‐2P carrying carboxylic and phosphoric acid groups is successfully applied for imaging hemorrhagic diseases. LJ‐2P demonstrates a strong affinity for fibrinogen and fibrin clots both computationally and experimentally, thus exhibiting increased brightness upon coagulation. As compared to Indocyanine Green, LJ‐2P provides a longer imaging window, higher imaging specificity, and signal‐to‐background ratio, as well as superior photobleaching resistance in three disease models: gastric, pulmonary, and cerebral hemorrhages. These results reveal that LJ‐2P demonstrates enhanced imaging capabilities, enabling precise identification of hemorrhagic sites.
Discovery of FeP/Carbon Dots Nanozymes for Enhanced Peroxidase‐Like Catalytic and Antibacterial Activity
Authors: Dong Jiaxin , Liu Guanxiong , Petrov Yuri V. , Feng Yujie , Jia Dechang , Baulin Vladimir E , Yu Tsivadze Aslan , Zhou Yu , Li Baoqiang 
Published: August 2024

AbstractIron phosphide/carbon (FeP/C) serving as electrocatalysts exhibit excellent activity in oxygen reduction reaction (ORR) process. H2O2 catalyzed by peroxidase (POD) is similar to the formation of new electron transfer channels and the optimization of adsorption of oxygen‐containing intermediates or desorption of products in ORR process. However, it is still a challenge to discover FeP/C with enhanced POD‐like catalytic activity in the electrocatalytic database for biocatalysis. The discovery of FeP/carbon dots (FeP/CDs) nanozymes driven by electrocatalytic activity for enhanced POD‐like ability is demonstrated. FeP/CDs derived from CDs‐Fe3+ chelates show enhanced POD‐like catalytic and antibacterial activity. FeP/CDs exhibit enhanced POD‐like activities with a specific activity of 31.1 U mg−1 that is double higher than that of FeP. The antibacterial ability of FeP/CDs nanozymes with enhanced POD‐like activity is 98.1%. The antibacterial rate of FeP/CDs nanozymes (250 µg mL−1) increased by 5%, 15%, and 36% compared with FeP, Fe2O3/CDs, and Cu3P/CDs nanozymes, respectively. FeP/CDs nanozymes will attract more efforts to discover or screen transition metal phosphide/C nanozymes with enhanced POD‐like catalytic activity for biocatalysis in the electrocatalytic database.
Impact of Crosslinking Degree on Chitosan and Oxidized Guar Gum‐Based Injectable Hydrogels for Biomedical Applications
Authors: Moreira Filho Raimundo Nonato Fernandes , de Oliveira Matheus Xavier , Brito Soares Ana Lorena , Maciel Marques Lidyane Souto , Chevallier Pascale , Mantovani Diego , Andrade Feitosa Judith Pessoa , Vieira Rodrigo Silveira 
Published: August 2024

AbstractEvaluating the biodegradability and biocompatibility of hydrogels is essential for identifying materials suitable for biomedical applications. This study describes the fabrication of hydrogels utilizing physiological‐soluble chitosan (N‐succinyl chitosan, NSC) crosslinked with dialdehyde guar gum (Oxidized Galactomannan, OxGM) via the Schiff‐base reaction. Hydrogels with varying volumetric ratios of NSC/OxGM, resulting in distinct NH2/CHO functional group ratios and crosslinking degrees, underwent comprehensive characterization using Fourier‐transform infrared spectroscopy (FTIR), X‐ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), swelling, and scanning electron microscopy (SEM). Gelation time (tgel) is assessed by rheological analysis (tgel = G′ > G″), where tgel increased with higher crosslinking density, reaching a maximum value of ≈80 s. Biodegradation analysis in phosphate‐buffered saline (PBS) with lysozyme (13 mg L−1) revealed that the crosslinking degree significantly influenced degradation, with lower crosslinking associated with an elevated degradation profile. Moreover, cell viability assays with fibroblastic cells demonstrated minimal cytotoxicity, but an increase in free aldehyde groups correlated with decreased cell viability. For the 75C25C hydrogel, the compressive test yielded a Young's modulus value of 67.2 kPa (±8.5). These results imply that the hydrogels developed exhibit favorable biodegradability and biocompatibility, making them promising candidates for diverse biomedical applications.
Electrically Switchable Transmissive and Reflective Liquid Crystal Polarization Gratings Based on Cholesteric Liquid Crystals
Authors: Chuang Yi‐Te , Li Yu‐Chieh , Feng Ting‐Mao , Wang Chun‐Ta 
Published: August 2024

AbstractLiquid crystal polarization gratings (LCPGs) are a superior alternative to traditional diffraction gratings due to their high diffraction efficiency, strong polarization sensitivity, and versatile tunability. This paper introduces an electrically switchable LCPG based on cholesteric liquid crystals (CLCs). The LCPG is designed to operate in reflective (R‐mode) and transmissive (T‐mode) states. It utilizes the standing helical (SH) configuration of CLCs for reflective functionality and transitions to a lying helical (LH) configuration for transmissive operations. This dual‐mode capability is achieved through a unique application of electric fields, which reorient the liquid crystal helix axis according to the desired optical function. The performance of the LCPG in both R‐mode and T‐mode is evaluated by applying different frequencies and voltages to dynamically switch between the helical states. The manufacturing process is simple, and the device performs robustly. This suggests that the technology could be useful for developing optical systems that require dynamic control over light modulation.
Pd‐Catalyzed Allylic Substitution Using Nucleophilic Amines: Access to Functionalized Mono‐ and Bis‐N‐Allyl Synthons
Authors: Gao Fengyun , Ghorai Debasish , Benet‐Buchholz Jordi , Kleij Arjan W. 
Published: August 2024

AbstractWe here report a catalytic strategy to enable the decarboxylative allylic amination of vinyl cyclic carbonates using various aliphatic and nucleophilic amines. The use of a protic medium and chelating diphosphine ligands are the main drivers towards chemoselective allylic amine formation, thereby minimizing undesired ligand‐driven complex speciation and aminolysis of the involved substrate. This improved approach amplifies the repertoire of allylic amine synthons that can be prepared from a variety of substrate combinations.
Cyanobacterial Artificial Plants for Enhanced Indoor Carbon Capture and Utilization
Authors: Rezaie Maryam , Choi Seokheun 
Published: August 2024

AbstractIndoor carbon dioxide (CO2) levels are often significantly higher than those outdoors, which is a growing health concern, particularly in urban areas where people spend over 80% of their time indoors. Traditional CO2 mitigation methods, such as ventilation and filtration, are becoming less effective as outdoor CO2 levels increase due to global warming. This study introduces a novel solution: cyanobacterial artificial plants that enhance indoor carbon capture while converting CO2 into oxygen (O2) and bioelectricity. These artificial plants use indoor light to drive photosynthesis, achieving a 90% reduction in indoor CO2 levels, from 5000 to 500 ppm—far surpassing the 10% reduction seen with natural plants. In addition to improving air quality, the system produces O2 and enough bioelectricity to power portable electronics. Each artificial leaf contains five biological solar cells that generate electricity during photosynthesis, with water and nutrients supplied through transpiration and capillary action, mimicking natural plant systems. The system generates an open circuit voltage of 2.7 V and a maximum power output of 140 µW. This decentralized approach offers a sustainable, energy‐efficient solution to indoor environmental challenges, providing improved air quality and renewable electricity amid rising global CO2 levels.
Role of Covalency on the Metal‐Insulator Behavior of BaPbO3${\rm BaPbO}_3$ and Ba2PbO4${\rm Ba}_2{\rm PbO}_4$
Authors: Choudhary Shivam , Raghunathan Rajamani 
Published: August 2024

Abstract (BPO) and (B2PO) are two sister compounds with identical valence configuration. However, BPO is reported to be metallic, B2PO is known to be gapped. The metallic nature of BPO itself is debated in the literature. A previous combinatorial experimental and theoretical study had claimed octahedral rotations as the reason for metallicity. On the contrary, a recent theoretical study has attributed the octahedral distortions for the gapped behavior. Motivated by these conflicting conclusions, the electronic structure of these two compounds is probed within the framework of density functional theory. It is shown that B2PO has a larger semi conducting gap of 1.4 eV compared to BPO, eventhough there are no octahedral distortions. Using maximally localized Wannier function (MLWF) calculations, it is divulged that the reduction of Pb‐O covalency is the key to opening of bandgap in these systems. It is shown that the cubic phase of BPO is metallic and that the covalency is reduced by the octahedral rotations in non‐cubic phases leading to the opening of pseudo‐gap. Whereas in B2PO the confinement of covalency to 2D layers leads to a semi‐conducting behavior.
The Normal Weight Obesity (NWO) Problem—Prevalence and Time Changes in Children and Adolescents From Kraków (Poland)
Authors: Żegleń Magdalena , Kryst Łukasz , Kowal Małgorzata , Słowik Jacek , Woronkowicz Agnieszka 
Published: August 2024

ABSTRACTObjectivesNormal weight obesity can be associated with an increased risk of metabolic abnormalities, systemic inflammation and mortality. The main aim of the study was to analyze the changes in the prevalence of normal weight obesity in 8–18‐year‐olds from Kraków (Poland) between 2010 and 2020.MethodsThe study was based on two sets of cross‐sectional, school‐based data obtained in 2010 and 2020. Body height, weight, and fat percentage were obtained. Body mass index was calculated, and only normal‐weight individuals were included. Normal weight obesity was defined as normal BMI with adiposity >85 percentile for age and sex.ResultsThe prevalence of normal weight obesity among Polish children and adolescents has been alarming for at least the last 10 years. Depending on the sex and age, normal weight obesity was present in more than 10% up to even more than 20% of the examined population.ConclusionsAlarming numbers of Polish children and adolescents suffer from NWO and this problem seems to be present for at least the last decade. A need for a maximally universal definition and cut‐offs to diagnose normal weight obesity should also be stressed, as it will be helpful in providing the best prophylaxis and help to persons already suffering from normal weight obesity.
Highly Dispersed Pd@ZIF‐8 for Photo‐Assisted Cross‐Couplings and CO2 to Methanol: Activity and Selectivity Insights
Authors: Velisoju Vijay K. , Ramos‐Fernández Enrique V. , Kancherla Rajesh , Ahmad Rafia , Pal Kuntal , Mohamed Hend , Cerrillo Jose L. , Meijerink Mark J. , Cavallo Luigi , Rueping Magnus , Castaño Pedro 
Published: August 2024

AbstractOur study unveils a pioneering methodology that effectively distributes Pd species within a zeolitic imidazolate framework‐8 (ZIF‐8). We demonstrate that Pd can be encapsulated within ZIF‐8 as atomically dispersed Pd species that function as an excited‐state transition metal catalyst for promoting carbon–carbon (C−C) cross‐couplings at room temperature using visible light as the driving force. Furthermore, the same material can be reduced at 250 °C, forming Pd metal nanoparticles encapsulated in ZIF‐8. This catalyst shows high rates and selectivity for carbon dioxide hydrogenation to methanol under industrially relevant conditions (250 °C, 50 bar): 7.46 molmethanol molmetal−1 h−1 and >99 %. Our results demonstrate the correlations of the catalyst structure with the performances at experimental and theoretical levels.
Visible Light‐Responsive Crystalline B←N Host Adducts with Solvent‐Induced Allosteric Effect for Guest Release
Authors: Xu Jieqiong , Wang Tao , Deng Shengyong , Lai Weiming , Shi Yadong , Zhao Yanyu , Huang Feihe , Wei Peifa 
Published: August 2024

AbstractPhoto‐responsive organic crystals, capable of converting light energy into chemical energy to initiate conformational transitions, present an emerging strategy for developing lightweight and versatile smart materials. However, visible light‐triggered tailored guests capture and release behaviors in all‐organic solids are rarely reported. Here, we introduce a photoreactive crystalline boron‐nitrogen (B←N) host adduct with the ability to undergo [2+2] photocycloaddition upon 447 nm light exposure. This process facilitates single‐crystal‐to‐single‐crystal (SCSC) photodimerization in the mother liquor, maintaining the original B←N host structure. Weakened intermolecular interactions within the photodimer host contribute to fast guest release in air under irradiation. Furthermore, the dynamic B←N bonds enable reversible transformations between organic host adducts and adduct cocrystals under the solvent‐induced allosteric effect. As a result, four B←N host adduct crystals containing individual alkane guest are easily obtained and exhibited the ability of photo‐controlled alkane release. Therefore, the integration of photo reactivity and structural transformation within B←N host adduct enables customized capture and release of guest molecules.
Super anti‐impact silicone elastomer with shell‐less shear thickening fluid droplets in matrix
Authors: Zhao Junge , Liao Guodong , Jiang Ruiwen , Yang Jing , Li Xunzhang , Yang Feng , Wang Yangxin , Zhang Yanan , Zhao Huaixia 
Published: August 2024

AbstractA soft and stretchable safeguarding silicone rubber is obtained by embedding large amount of shell‐less shear thickening fluid (STF) droplets into polydimethylsiloxane (PDMS) matrix through the synergistic process of emulsification and polymerization. Feeding time and temperature are optimized to generate the efficient STFs with 72.2 wt% SiO2 and high thickening viscosity of 6340 Pa·s. The embedding process and the evolution of the shell‐less STF droplets in PDMS matrix are explored by both optical and scanning electronic microscopes. The influence of the STF content on the mechanical and anti‐impact performance of the composites is explored through tensile tests and drop hammer tests. The STF content could be as much as 75 wt%, which enhances not only the softness and stretchability (elongation at break >200%) but also the impact‐protective performance of the silicone rubber. The STF/PDMS composites covering on planar and nonplanar glass substrates demonstrate self‐adaptive protection effect by reducing the force impact peak by 35%, due to the shear thickening and energy absorption of STF in the composites. This study develops a facile and scalable method for the implantation of the STF into polymer matrix, extending the applications of STF/PDMS composites in varied fields.
Making it explicit – Sustained shared thinking dialogue as a way to explore children's perspectives on quality in German early childhood education and care
Authors: Macha Katrin , Hildebrandt Frauke , Wronski Caroline , Lonnemann Jan , Urban Mathias 
Published: August 2024

AbstractTo negotiate quality in early childhood education and care, we must ask from different perspectives what constitutes a good centre for children. The children themselves have only recently been identified as a resource to contribute to that discussion. Several studies have described profound methodologies to obtain children's perspectives by observing, interviewing and conducting group discussions. This article introduces research that combines exploring children's perspectives with sustained shared thinking (SST). Focussing on the dialogue following the rules of SST, we conducted and analysed group discussions with children about their lives within a children's centre in Berlin, Germany. The children were asked to think about aspects of quality. They expressed their ideas, wishes, likes and dislikes within the centre explicitly and profoundly. Following the lead of these children, a dialogue developed in which children and researchers contributed equally and led the way. This showed how well children could act out their agency and were capable of expressing rational and reasonable opinions. Here, we argue that SST helps to see the pedagogical side of exploring children's perspectives and acknowledges this as a pedagogical and political act. Children experience being heard and having a say in shaping situations. This is in itself a pedagogical situation a researcher should be aware of.