bluuebunny/crossref_metadata_2025_split huggingface dataset:
Composition‐Dependent Photoluminescence Properties and Anti‐Counterfeiting Applications of A2AgX3 (A = Rb, Cs; X = Cl, Br, I)
Authors: Kumar Pawan , Creason Tielyr D. , Fattal Hadiah , Sharma Manila , Du Mao‐Hua , Saparov Bayram 
Published: September 2021

AbstractCopper(I) halides are emerging as attractive alternatives to lead halide perovskites for optical and electronic applications. However, blue‐emitting all‐inorganic copper(I) halides suffer from poor stability and lack of tunability of their photoluminescence (PL) properties. Here, the preparation of silver(I) halides A2AgX3 (A = Rb, Cs; X = Cl, Br, I) through solid‐state synthesis is reported. In contrast to the Cu(I) analogs, A2AgX3 are broad‐band emitters sensitive to A and X site substitutions. First‐principle calculations show that defect‐bound excitons are responsible for the observed main PL peaks in Rb2AgX3 and that self‐trapped excitons (STEs) contribute to a minor PL peak in Rb2AgBr3. This is in sharp contrast to Rb2CuX3, in which the PL is dominated by the emission by STEs. Moreover, the replacement of Cu(I) with Ag(I) in A2AgX3 significantly improves photostability and stability in the air under ambient conditions, which enables their consideration for practical applications. Thus, luminescent inks based on A2AgX3 are prepared and successfully used in anti‐counterfeiting applications. The excellent light emission properties, significantly improved stability, simple preparation method, and tunable light emission properties demonstrated by A2AgX3 suggest that silver(I) halides may be attractive alternatives to toxic lead halide perovskites and unstable copper(I) halides for optical applications.
Engineering Bacteria‐Activated Multifunctionalized Hydrogel for Promoting Diabetic Wound Healing
Authors: Lu Yifei , Li Haisheng , Wang Jing , Yao Mengyun , Peng Yuan , Liu Tengfei , Li Zhou , Luo Gaoxing , Deng Jun 
Published: September 2021

AbstractEngineering therapeutic angiogenesis in impaired tissues is critical for chronic wound healing. Materials can be engineered to deliver specific biological cues that enhance angiogenesis. However, currently available materials have limitations for use in angiogenesis engineering since the complex inflammation environment of wounds requires spatiotemporal control. Immune cells are the central component of wound microenvironment and orchestrate immune responses to wound healing. This study presents a novel approach of using a delivery system comprising living Lactococcus, incorporated in a heparin‐poloxamer thermoresponsive hydrogel, designed to bioengineer the wound microenvironment and enhance the angiogenesis in a highly dynamic‐temporal manner. The living system can produce and protect vascular endothelial growth factor (VEGF) to increase proliferation, migration, and tube formation of endothelial cells, as well as secrete lactic acid to shift macrophages toward an anti‐inflammatory phenotype, resulting in successful angiogenesis in diabetic wounds. Further, the delivery system confines the bacterial population to wounds, thereby minimizing the risk of systemic toxicities. Therefore, this living hydrogel system can be harnessed for safe and efficient delivery of therapeutics that drive the wound microenvironment toward rapid healing and may serve as a promising scaffold in regenerative medicine.
Multifunctional DNA Hydrogels with Hydrocolloid‐Cotton Structure for Regeneration of Diabetic Infectious Wounds
Authors: Zhou Liping , Pi Wei , Cheng Siyang , Gu Zhen , Zhang Kexin , Min Tiantian , Zhang Wenmin , Du Hongwu , Zhang Peixun , Wen Yongqiang 
Published: September 2021

AbstractCurrently, diabetic infectious wound treatments remain a significant challenge for regenerative medicine due to the unicity of clinical dressings, which lack systemic multifunctional wound dressings with high absorbability, customizable shape, rapid self‐healing, guiding tissue regeneration, and restoring physiological functions. Here, a multifunctional DNA hydrogel is conveniently obtained through grafting DNA units and polyethyleneimine dynamic cross‐linking and doped heating function black phosphorus quantum dots. The obtained DNA hydrogel features excellent exudate absorption performance, adjustable heating ability, mechanical behavior, self‐healing ability, writability, tissue adhesion, and antibacterial properties. The incorporation of procyanidin B2 (OPC B2) endows the DNA hydrogels with renowned scavenging free radicals and antioxidant properties. Furthermore, the DNA hydrogel dressing can promote the transformation of macrophages from pro‐inflammatory M1 into repairing M2 phenotype, keeping the wound in a stable remodeled state. Astonishingly, the DNA hydrogel dressing can activate neurons to transform into a repair state, accelerating skin nerve regeneration and angiogenesis. Beyond that, it can recruit myeloid cells to activate the adaptive immune response, enhancing the ability of DNA hydrogel dressing to promote tissue regeneration, thereby promoting hair follicle and hair regeneration. Therefore, this advanced collaborative strategy provides an effective method for cascade management of clinical guided tissue regeneration.
White Blood Cell Membrane‐Coated Nanoparticles: Recent Development and Medical Applications
Authors: Wang Dan , Wang Shuyan , Zhou Zhidong , Bai Dean , Zhang Qiangzhe , Ai Xiangzhao , Gao Weiwei , Zhang Liangfang 
Published: September 2021

AbstractWhite blood cells (WBCs) are immune cells that play essential roles in critical diseases including cancers, infections, and inflammatory disorders. Their dynamic and diverse functions have inspired the development of WBC membrane‐coated nanoparticles (denoted “WBC‐NPs”), which are formed by fusing the plasma membranes of WBCs, such as macrophages, neutrophils, T cells, and natural killer cells, onto synthetic nanoparticle cores. Inheriting the entire source cell antigens, WBC‐NPs act as source cell decoys and simulate their broad biointerfacing properties with intriguing therapeutic potentials. Herein, the recent development and medical applications of WBC‐NPs focusing on four areas, including WBC‐NPs as carriers for drug delivery, as countermeasures for biological neutralization, as nanovaccines for immune modulation, and as tools for the isolation of circulating tumor cells and fundamental research is reviewed. Overall, the recent development and studies of WBC‐NPs have established the platform as versatile nanotherapeutics and tools with broad medical application potentials.
Mn‐Rich MnSb2Te4: A Topological Insulator with Magnetic Gap Closing at High Curie Temperatures of 45–50 K
Authors: Wimmer Stefan , Sánchez‐Barriga Jaime , Küppers Philipp , Ney Andreas , Schierle Enrico , Freyse Friedrich , Caha Ondrej , Michalička Jan , Liebmann Marcus , Primetzhofer Daniel , Hoffman Martin , Ernst Arthur , Otrokov Mikhail M. , Bihlmayer Gustav , Weschke Eugen , Lake Bella , Chulkov Evgueni V. , Morgenstern Markus , Bauer Günther , Springholz Gunther , Rader Oliver 
Published: September 2021

AbstractFerromagnetic topological insulators exhibit the quantum anomalous Hall effect, which is potentially useful for high‐precision metrology, edge channel spintronics, and topological qubits. The stable 2+ state of Mn enables intrinsic magnetic topological insulators. MnBi2Te4 is, however, antiferromagnetic with 25 K Néel temperature and is strongly n‐doped. In this work, p‐type MnSb2Te4, previously considered topologically trivial, is shown to be a ferromagnetic topological insulator for a few percent Mn excess. i) Ferromagnetic hysteresis with record Curie temperature of 45–50 K, ii) out‐of‐plane magnetic anisotropy, iii) a 2D Dirac cone with the Dirac point close to the Fermi level, iv) out‐of‐plane spin polarization as revealed by photoelectron spectroscopy, and v) a magnetically induced bandgap closing at the Curie temperature, demonstrated by scanning tunneling spectroscopy (STS), are shown. Moreover, a critical exponent of the magnetization β ≈ 1 is found, indicating the vicinity of a quantum critical point. Ab initio calculations reveal that Mn–Sb site exchange provides the ferromagnetic interlayer coupling and the slight excess of Mn nearly doubles the Curie temperature. Remaining deviations from the ferromagnetic order open the inverted bulk bandgap and render MnSb2Te4 a robust topological insulator and new benchmark for magnetic topological insulators.
π‐Conjugated Small Molecules Modified SnO2 Layer for Perovskite Solar Cells with over 23% Efficiency
Authors: Lou Qiang , Han Yufang , Liu Chang , Zheng Kanghui , Zhang Jinsheng , Chen Xia , Du Qing , Chen Chong , Ge Ziyi 
Published: September 2021

AbstractSnO2 has been universally applied as electron transporting layer (ETL) towards the fabrication of highly efficient perovskite solar cells (PSCs), owing to its unique advantages including low‐temperature solution‐processability, high optical, transmittance and good electrical conductivity. Uncoordinated Sn‐dangling bonds on SnO2 surface exist as deep traps to capture the photogenerated carriers, causing hysteresis and device instability. Fullerene derivatives, though being widely utilized as the passivator for SnO2, are highly prone to self‐aggregate due to their π‐cage structures, which hampers passivation. Herein, π‐conjugated n‐type small molecules with better film formation ability are innovatively designed, to improve passivation effectiveness. By exploring the interplay between molecular stacking of small molecules and charge transporting/recombination dynamics at the SnO2/perovskite interface, it is unveiled that a more compact molecular packing of the organic passivators yields superior interfacial characteristics, in terms of fewer trap states, lower charge recombination and higher electron transporting efficiency. An impressive PCE over 23% is achieved with the assistance of this new‐type SnO2‐passivator, which is among the highest reported value for triple‐cation perovskite systems to date. This work offers an original concept for the design and synthesis of ETL passivators towards the development of high performance and stable PSCs.
Characterizing Batteries by In Situ Electrochemical Atomic Force Microscopy: A Critical Review
Authors: Zhang Zhenyu , Said Samia , Smith Keenan , Jervis Rhodri , Howard Christopher A. , Shearing Paul R. , Brett Dan J. L. , Miller Thomas S. 
Published: September 2021

AbstractAlthough lithium, and other alkali ion, batteries are widely utilized and studied, many of the chemical and mechanical processes that underpin the materials within, and drive their degradation/failure, are not fully understood. Hence, to enhance the understanding of these processes various ex situ, in situ and operando characterization methods are being explored. Recently, electrochemical atomic force microscopy (EC‐AFM), and related techniques, have emerged as crucial platforms for the versatile characterization of battery material surfaces. They have revealed insights into the morphological, mechanical, chemical, and physical properties of battery materials when they evolve under electrochemical control. This critical review will appraise the progress made in the understanding batteries using EC‐AFM, covering both traditional and new electrode–electrolyte material junctions. This progress will be juxtaposed against the ability, or inability, of the system adopted to embody a truly representative battery environment. By contrasting key EC‐AFM literature with conclusions drawn from alternative characterization tools, the unique power of EC‐AFM to elucidate processes at battery interfaces is highlighted. Simultaneously opportunities for complementing EC‐AFM data with a range of spectroscopic, microscopic, and diffraction techniques to overcome its limitations are described, thus facilitating improved battery performance.
Hard Carbon Anodes for Next‐Generation Li‐Ion Batteries: Review and Perspective
Authors: Xie Lijing , Tang Cheng , Bi Zhihong , Song Mingxin , Fan Yafeng , Yan Chong , Li Xiaoming , Su Fangyuan , Zhang Qiang , Chen Chengmeng 
Published: September 2021

AbstractCarbonaceous materials have been accepted as a promising family of anode materials for lithium‐ion batteries (LIBs) owing to optimal overall performance. Among various emerging carbonaceous anode materials, hard carbons have recently gained significant attention for high‐energy LIBs. The most attractive features of hard carbons are the enriched microcrystalline structure, which not only benefits the uptake of more Li+ ions but also facilitates the Li+ ions intercalation and deintercalation. However, the booming application of hard carbons is significantly slowed by the low initial Coulombic efficiency, large initial irreversible capacity, and voltage hysteresis. Many efforts have been devoted to address these challenges toward practical applications. This paper focuses on an up‐to‐date overview of hard carbons, with an emphasis on the lithium storage fundamentals and material classification of hard carbons as well as present challenges and potential solutions. The future prospects and perspectives on hard carbons to enable practical application in next‐generation batteries are also highlighted.
Building a Better Li‐Garnet Solid Electrolyte/Metallic Li Interface with Antimony
Authors: Dubey Romain , Sastre Jordi , Cancellieri Claudia , Okur Faruk , Forster Alexander , Pompizii Lea , Priebe Agnieszka , Romanyuk Yaroslav E. , Jeurgens Lars P. H. , Kovalenko Maksym V. , Kravchyk Kostiantyn V. 
Published: September 2021

AbstractThe deployment of Li‐garnet Li7La3Zr2O12 (LLZO) solid‐state electrolytes in solid‐state batteries is severely hampered by their poor wettability with metallic Li. In this work, Sb is presented as a compelling interfacial layer allowing superior wetting of Li onto a LLZO surface, resulting in a remarkably low Li/LLZO interfacial resistance of 4.1(1) Ω cm2. An atomistic insight into Sb‐coated LLZO interface using soft and hard X‐ray photoelectron spectroscopy and focused ion beam time‐of‐flight secondary ion mass spectrometry shows the formation of a Li‐Sb alloy as an interlayer. It is determined that the Li/Sb‐coated LLZO/Li symmetrical cells exhibit a high critical current density of up to 0.64 mA cm−2 and low overpotentials of 40–50 mV at a current density of 0.2 mA cm−2 without applying external pressure. The electrochemical performance of Sb coated‐LLZO pellets is also assessed with an intercalation‐type V2O5 cathode. Li/Sb‐coated‐LLZO/V2O5 full cells deliver stable capacities of around 0.45 mAh cm−2, with a peak current density of 0.3 mA cm−2.
Influence of oral nutritional agents rich in soluble dietary fiber on intestinal flora of elderly men with malnutrition
Authors: Yu Dongni , Cheng Mingyue , Guo Lixin , Liu Wenli , Liu Ye , Ning Kang , Tong Yigang , Yan Xuejiao , Qiu Lei , Qi Haimei 
Published: September 2021

AbstractObjectiveObserve the influence of oral nutritional agents rich in soluble dietary (enteral nutritional suspension [TPF‐DM]) on intestinal flora of elderly male subjects with malnutrition.MethodSeventy‐eight subjects with good nutrition were considered as the healthy control group. Twenty‐eight male subjects who had malnutrition and were older than 70 years were included and randomly divided into the short‐term (3 months) intervention group (n = 20) and the long‐term (12 months) group (n = 8). They were provided with enteral nutritional suspension (TPF‐DM) 500 mL/day or maximum tolerance dose, so as to observe the changes in nutrition‐related indexes and intestinal flora after the elderly take enteral nutritional suspension (TPF‐DM).Results(1) For elderly male subjects with malnutrition, their body weight, body mass index, hemoglobin, total protein, and albumin were significantly lower than the control group with favorable nutrition. (2) There were obvious differences in intestinal flora between healthy elderly male subjects and those with malnutrition. After the treatment of enteral nutritional suspension (TPF‐DM), intestinal flora of the malnourished elderly subjects showed recovery toward the healthy elderly subjects. The obvious gradient changes of the flora were mainly in the bacteroidetes, firmicutes, and proteobacteria phyla, and the relative abundance of CAG2 clusters in the malnourished group was higher than that in the healthy control group, and the relative abundance decreased after long‐term treatment, and the change approached the healthy control group. The relative abundance of CAG3 and CAG6 clusters in the malnourished group was lower than that in the healthy control group, and the relative abundance increased after long‐term treatment, and the change approached the healthy control group.ConclusionMalnutrition has obvious impact on intestinal flora of the elderly. Enteral nutritional suspension (TPF‐DM) not only prevents the further decline in the state of nutrition but also helps the recovery in intestinal flora of the elderly. Long‐term application can produce better effects.
Antenatal diagnostic dilemma in a pseudodominant pedigree with lamin‐B receptor (LBR)‐related regressive spondylometaphyseal dysplasia
Authors: Turgut Gozde Tutku , Güleç Çağrı , Sarac Sivrikoz Tugba , Kale Hamdi , Karaman Birsen , Nishimura Gen , Altunoglu Umut 
Published: September 2021

AbstractThe lamin‐B receptor (LBR) encodes a dual‐functioning inner nuclear membrane protein essential for cholesterol biosynthesis and chromatin organization. LBR pathogenic variants cause distinct phenotypes due to the dual function of LBR, including Pelger–Huët anomaly (PHA), PHA with mild skeletal anomalies (PHASK; MIM# 618019), LBR‐related regressive type of spondylometaphyseal dysplasia (LBR‐R‐SMD), Greenberg dysplasia (MIM# 215140). We here report the first case with radiological manifestations of LBR‐R‐SMD in the fetal period, and milder skeletal findings in the similarly affected father. Direct sequencing of LBR revealed homozygous c.1534C>T (p.Arg512Trp) in exon 12 in both affected individuals. Our report further refines the early phenotype in LBR‐R‐SMD, and demonstrates that the p.Arg512Trp mutation is associated with PHA. We propose that LBR‐R‐SMD should be considered as a differential diagnosis in pregnancies with sonographic evidence of short and bowed tubular bones with narrow thorax. Evaluating peripheral blood smears of expectant parents for the presence of PHA may lead to a clinical diagnosis, allowing for comprehensive prenatal genetic counseling.
Surface modification of cellulose nanocrystals towards new materials development
Authors: Shi Zhenxu , Li Shufang , Li Mingxia , Gan Lin , Huang Jin 
Published: September 2021

AbstractCellulose nanocrystals (CNCs) are a kind of sustainable nanoparticle from biomass, which are widely used as reinforcing filler and assembly building block for high‐performance composites and function materials including biomaterial, optics, and so forth. Here, their unique advantages in material applications were reviewed based on their rod‐like morphology, crystalline structure, dimension‐related effects, and multi‐level order structure. Then, we focused on the molecular engineering of CNCs, including the structure and physicochemical properties of their surface, along with surface modification methods and steric effects. We further discussed the performance‐improvement and functionalization methods based on multi‐component complex systems, together with the effects of surface molecular engineering on the performance and functions. Meanwhile, methods of optimizing orientation in uniaxial arrays were discussed along with those of enhancing photoluminescence efficiency via surface chemical modification and substance coordination. In the end, we prospected the design, development, and construction methods of new CNCs materials.
Electrospun polyacrylonitrile nanofibrous membranes supported with montmorillonite for efficient PM2.5 filtration and adsorption of Cu (II) ions
Authors: Bansal Priya , Batra Radhika , Yadav Reetu , Purwar Roli 
Published: September 2021

AbstractIn this study, we have fabricated polyacrylonitrile/montmorillonite (PAN/Mt) nanofibrous nanocomposites with variation in concentration of Mt from 0.25% to 1.00%. The electrospinning process developed PAN/Mt nanofibrous nanocomposites having reduced fiber diameters and high surface roughness as observed in Field emission scanning electron microscopy. The nanocomposite nanofibers were characterized by X‐ray diffraction (XRD) and thermogravimetric analyzer for intercalation and thermal stability respectively. PAN/Mt nanofibrous nanocomposites were tested for their water vapor transmission rate, air permeability, burst strength, and tensile strength. The filtration efficiency of 0.75% PAN/Mt nanofibrous nanocomposite was found to be 98.7% for PM2.5 particles present in air with a pressure drop of 46.8 Pa. The adsorption of copper (II) (Cu (II)) ions using 0.75% PAN/Mt nanofibrous nanocomposites has also been studied. The effect of contact time and initial concentration of adsorbent on the adsorption of Cu (II) ions have been analyzed. It was found that the PAN/Mt nanofibrous membranes follows pseudo‐second‐order kinetic model and Langmuir adsorption isotherm for the adsorption of Cu (II) ions from aqueous solutions. This study suggests the potential implication of PAN/Mt nanofibrous nanocomposites for filtration of PM2.5 and adsorption of metal ions.
Immobilization of an organophosphorus compound on polypropylene‐g‐poly(glycidyl methacrylate) polymer support and its application in scandium recovery
Authors: Madrid Jordan F. , Barba Bin Jeremiah D. , Pomicpic Janronel C. , Cabalar Patrick Jay E. 
Published: September 2021

AbstractScandium is a rare earth element that has a wide range of uses in modern technology. The conventional recovery of scandium is commonly done by solvent extraction using organophosphorus compounds. This process however produces a lot of waste extractants. To circumvent this challenge, a model organophosphorus compound phenylphosphinic acid (PPI) was immobilized to a polymer support fabric to produce a Sc(III) adsorbent for high throughput scandium recovery with less waste generation. Polymer support (PP‐g‐PGMA) for the organophosphorus compound was synthesized using radiation‐induced graft polymerization. Successful post‐polymer modification of the PGMA grafts to attach PPI groups was carried out using 1 M PPI in isopropanol at 80°C for 4 h, achieving a maximum functional group density of 1.32 mmol/g. The obtained PP‐g‐PGMA‐PPI fabrics were used in the batch Sc(III) adsorption experiments. The results showed that PP‐g‐PGMA‐PPI effectively adsorbed low concentrations of Sc(III) at a pH of at least 2.0. More than 98% adsorption was achieved using 1 ppm Sc(III). The synthesized adsorbent was also shown to be selective for Sc(III) even in the presence of Fe(III) and Al(III) ions. PP‐g‐PGMA‐PPI adsorbent fabrics are therefore promising alternatives to solvent extraction methods and ion‐exchange granular resin technologies in the recovery of scandium.
Air‐Stable Mn doped CuCl/CuO Hybrid Triquetrous Nanoarrays as Bifunctional Electrocatalysts for Overall Water Splitting
Authors: Chen Ying , Cai Zhengyang , Wang Ding , Yan Ya , Wang Ping , Wang Xianying 
Published: September 2021

AbstractThe development of highly efficient non‐precious metal catalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is key for large‐scale hydrogen evolution through water splitting technology. Here, we report an air‐stable Cu‐based nanostructure consisting of Mn doped CuCl and CuO (CuCl/CuO(Mn)‐NF) as a dual functional electrocatalyst for water splitting. CuCl is identified as the main active component, together with Mn doping and the synergistic effect between CuCl and CuO are found to make responsibility for the excellent OER and HER catalytic activity and stability. The assembled electrolyzes also exhibit decent water splitting performance. This work not only provides a simple method for preparing Cu‐based composite catalyst, but also demonstrates the great potential of Cu‐based non‐noble metal electrocatalysts for water splitting and other renewable energy conversion technologies.