bluuebunny/crossref_metadata_2025_split huggingface dataset:
Client’s Satisfaction with Child Health Care Delivery in Tamale Teaching Hospital
Authors: Persues Afoko , Chirawurah Dennis , Nyarko Simon , Abdul-Wadudu Faridu , Baniakette Aaron Kamboe Bornette 
Published: April 2023

Background: Studies conducted in public hospitals in Ghana have provided empirical evidence of an inadequate level of quality of health care services, both in terms of objective measures of client opinions and those of health care providers.
Aim: The purpose of this study was to assess client satisfaction with the quality of healthcare delivery at the Child Health Department of the Tamale Teaching Hospital (TTH).
Methods: A mixed-methods cross-sectional study design using purposeful and convenience sampling techniques were used to obtain 385 parents or caregivers and 6 health professionals at the Tamale Teaching Hospital (TTH) from July, 2021 to April, 2022. Structured questionnaires were used to collect quantitative data, and a semi-structured interview guide was used to collect qualitative data.
Results: Most (90.9%) of the respondents are of the view that their children’s health needs were catered for in the facility while only 0.2% of respondents strongly disagreed that their child’s health needs were catered for in the facility. The study indicates that the 1st most ranked important satisfactory factor to the client’s healthcare service quality is tangibility with an RII of 1.20 and the least ranked was priority and responsiveness of RII of 0.40 respectively.
Conclusions: Child healthcare service patronage in TTH is generally high. Although the needs of the people are met, we recommend that the management of the hospital should prioritize medical and surgical conditions in the hospital by providing equipment and logistics.
Nanoconfined Molecular Catalysts in Integrated Gas Diffusion Electrodes for High‐Current‐Density CO2 Electroreduction
Authors: Lv Xiangzhou , Liu Qian , Yang Hao , Wang Jianghao , Wu Xiuju , Li Xiaotong , Qi Zhifu , Yan Jianhua , Wu Angjian , Cheng Tao , Wu Hao Bin 
Published: April 2023

AbstractMolecular catalysts are promising catalysts to electrochemically convert CO2 into CO with high selectivity. However, achieving industrial‐level current density remains challenging due to the limitation of charge‐ and mass‐transport in gas diffusion electrode. Herein, a novel gas diffusion electrode architecture by confining highly dispersed cobalt(II) phthalocyanine (CoPc) molecules into ‐graphene oxide (GO) nanosheets (denoted as CoPc@GO) is designed. Benefiting from the accelerated CO2 diffusion and charge transport in the nanoconfined structure, the designed electrode achieves a high CO partial current density of 481.65 ± 12.50 mA cm−2 and a cathode energy efficiency over 64% for CO. The experimentally measured CO2 transport dynamics and molecular dynamics simulation confirm the accelerated CO2 diffusion, while theoretical calculations reveal the decreased energy barrier of the CO2 activation in the confined space. This study paves a new way for electrode architecture design that would accelerate the implementation of CO2 electrolysis technology.
SACs on Non‐Carbon Substrates: Can They Outperform for Water Splitting?
Authors: Sun Tao , Zang Wenjie , Sun Jianguo , Li Chenguang , Fan Jun , Liu Enzhou , Wang John 
Published: April 2023

AbstractNon‐carbon‐supported single‐atom electrocatalysts (SACs) have attracted tremendous research interest for water splitting, owning to their remarkable differences in bond and coordination, and better and tunable catalytic performance, compared with those carbon‐supported SACs and commercial catalysts. The electrocatalytic performance of these non‐carbon‐supported SACs is intimately related to the structure, surficial chemical groups, and vacancy defects of non‐carbon host materials, as well as the physico‐chemical properties and population of single atoms. The much widened range of host materials and types of single atoms create virtually limitless opportunities in the design of SACs with tunable structures and electrocatalysis behaviors. In this review, the recent progress of non‐carbon‐supported SACs for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is visited, where the unique local structures, electrocatalytic performance, catalytic centers and key preparation processes are presented. The characterizations down to atomic scales that can reveal the key local structures and catalytic mechanism are also investigated. New insights into the correlations between the structural evolution of these SACs during electrocatalytic reactions and their catalytic performance are examined. Finally, the major challenges faced by these new SACs are summarized, together with future perspectives on the rational design of superior non‐carbon‐supported SACs.
Programmable Water/Light Dual‐Responsive Hollow Hydrogel Fiber Actuator for Efficient Desalination with Anti‐Salt Accumulation
Authors: Liu Hui , Luo Huan , Huang Jianying , Chen Zhong , Yu Zhihua , Lai Yuekun 
Published: April 2023

AbstractAn intelligent fiber actuator that can sense, adapt, and interact with environmental stimuli is highly desirable for numerous applications. However, conventional fiber sensors have difficulty in responding to complex environments with fast sensing and actuation. Herein, water/light dual‐responsive double‐twisted RGO@HHF (hollow hydrogel fiber loaded with reduced graphene oxide) actuators are successfully developed based on dynamic self‐contraction/elongation via twisting, folding, plying, and re‐plying process. Under stimuli by water and light, the twisted RGO@HHF provides a forward and reverse torsional stroke of 3168 and 60° cm−1, respectively. The excellent swelling properties endow the fiber with highly effective water‐responsive ability, and the hollow structure can reduce the water required for fiber to swell. Meanwhile, the RGO loading further accelerates water evaporation and enhances the light response rate of the fiber. After twisting and re‐plying, the double‐twisted RGO@HHF exhibits highly increased elongation and contraction under light/water stimulation. On this basis, a new strategy is proposed for efficient desalination and anti‐salt accumulation. The double‐twisted RGO@HHF can elongate to absorb water and contract to evaporate seawater under sunlight/water stimulation, respectively. The accumulated salt can be dissolved in the seawater during the dynamic process. This study provides a promising approach for realizing sustainable seawater desalination.
Planar Sodium‐Nickel Chloride Batteries with High Areal Capacity for Sustainable Energy Storage
Authors: Lan Tu , Graeber Gustav , Sieuw Louis , Svaluto‐Ferro Enea , Vagliani Fabrizio , Basso Diego , Turconi Alberto , Battaglia Corsin , Heinz Meike V. F. 
Published: April 2023

AbstractHigh‐temperature sodium‐nickel chloride (Na‐NiCl2) batteries are a promising solution for stationary energy storage, but the complex tubular geometry of the solid electrolyte represents a challenge for manufacturing. A planar electrolyte and cell design is more compatible with automated mass production. However, the planar cell design also faces a series of challenges, such as the management of molten phases during cycling. As a result, cycling of planar high‐temperature cells until now focused on moderate areal capacities and current densities. In this work, planar cells capable of integrating cost‐efficient nickel/iron electrodes at a substantially enhanced areal capacity of 150 mAh cm−2 is presented. Due to a low cell resistance during operation at 300 °C, these cells deliver a specific discharge energy of 300 Wh kg−1 at high discharge current densities of 80 mA cm−2 (C/2, 10%–100% state‐of‐charge). This results represent the first demonstration of planar Na‐NiCl2 cells at a commercially relevant combination of areal capacity, cycling rate, and energy efficiency. It is further identified the secondary molten NaAlCl4 electrolyte to contribute to the cell capacity during cycling. Mitigating electrochemical decomposition of NaAlCl4 will play an important role in further enhancing both cycling rates and cycle life of high temperature Na‐NiCl2 batteries.
Unravelling the Solvation Structure and Interfacial Mechanism of Fluorinated Localized High Concentration Electrolytes in K‐ion Batteries
Authors: Nie Ping , Liu Meiqi , Qu Wenhui , Hou Meiqi , Chang Limin , Wu Zhuomei , Wang Hairui , Jiang Jiangmin 
Published: April 2023

AbstractElectrolyte is critical for the electrochemical properties of potassium‐ion batteries. The high‐concentration electrolyte has achieved significant effects in inhibiting the growth of dendrites and improving the cycle life of potassium ion batteries. However, the application remains challenging owing to the issues of high viscosity, low conductivity and poor electrode wettability. Herein, a fluorinated localized high concentration electrolyte (LHCE) based on potassium bis(fluorosulfonyl) imide/dimethoxyethane is designed for use in K‐ion batteries. The electrolyte structure, interfacial mechanism and diffusion kinetics are analyzed systematically through physical/electrochemical characterization and molecular dynamics simulations. The LHCE is proven to have excellent oxidation stability, low flammability, and excellent electrode wettability. Furthermore, the LHCE is investigated in a half‐cell assembled by using polyimide‐derived nitrogen doped carbon material as an anode, which exhibits a reversible capacity of 169 mAh g−1 and high‐capacity retention upon 200 cycles at a current rate of 100 mA g−1. Fundamental mechanism on enhanced cycling stability of the carbon anodes using optimized LHCE is also investigated. This work demonstrates an example of developing new electrolytes for high performance potassium ion batteries, and also provides theoretical guidance and significant reference for electrode interphase design and engineering.
Ultraviolet Emission from Cerium‐Based Organic‐Inorganic Hybrid Halides and Their Abnormal Anti‐Thermal Quenching Behavior
Authors: Wang Qiujie , Bai Tianxin , Ji Sujun , Zhao Hongyuan , Meng Xuan , Zhang Ruiling , Jiang Junke , Liu Feng 
Published: April 2023

AbstractRare earth elements are widely employed and investigated as dopants in luminescent materials because of their ability to modulate hosts’ specific physical and chemical properties. However, stable phosphors crystallized with pure rare earth elements are few and hence their potential for wider utilization is largely limited. Herein, two examples of cerium (Ce)‐based organic–inorganic hybrid halides, (DFPD)4CeX7 (DFPD+ = 4,4‐difluoropiperidinium; X− = Cl− and Br−) and (DFPD)CeCl4·2MeOH are demonstrated. The Cl compositions of both examples are capable of emitting the fascinating ultraviolet (UV) light (350–375 nm), which represents the shortest emission wavelength ever reported in existing metal halide perovskites. Moreover, the resulting crystals are of high quality, which have intrinsic photoluminescence quantum yields of 95%–100%. Besides, in contrast to their all‐inorganic counterparts like Ce3CeBr6, the proposed two forms of Ce3+‐based halides show abnormal anti‐thermal quenching behavior (≈128% of emission intensity at 420 K relative to 80 K), being particularly applicable for practical use in a heated environment. A phosphor‐converted light‐emitting diode fabricated with (DFPD)4CeCl7 demonstrates stable UV emission (840 min) and has a high external quantum efficiency of 1%. This study opens up the way to a possible design of robust UV‐emitting structures based on rare earth hybrid metal halides.
Boosting Piezo‐Catalytic Activity of KNN‐Based Materials with Phase Boundary and Defect Engineering
Authors: Liao Jiayang , Lv Xiang , Sun Xi‐xi , Li Junhua , Wang Haomin , Chen Qiang , Lu Hanpeng , Wang Duan , Bi Jian , Wu Jiagang 
Published: April 2023

AbstractAlthough the piezo‐catalysis is promising for the environmental remediation and biomedicine, the piezo‐catalytic properties of various piezoelectric materials are limited by low carrier concentrations and mobility, and rapid electron‐hole pair recombination, and reported regulating strategies are quite complex and difficult. Herein, a new and simple strategy, integrating phase boundary engineering and defect engineering, to boost the piezo‐catalytic activity of potassium sodium niobate ((K, Na)NbO3, KNN) based materials is innovatively proposed. Tur strategy is validated by exampling 0.96(K0.48Na0.52)Nb0.955Sb0.045O3‐0.04(BixNa4‐3x)0.5ZrO3‐0.3%Fe2O3 material having phase boundary engineering and conducted the defect engineering via the high‐energy sand‐grinding. A high reaction rate constant k of 92.49 × 10−3 min−1 in the sand‐grinding sample is obtained, which is 2.40 times than that of non‐sand‐grinding one and superior to those of other representative lead‐free perovskite piezoelectric materials. Meanwhile, the sand‐grinding sample has remarkable bactericidal properties against Escherichia coli and Staphylococcus aureus. Superior piezo‐catalytic activities originate from the enhanced electron‐hole pair separation and the increased carrier concentration. This study provides a novel method for improving the piezo‐catalytic activities of lead‐free piezoelectric materials and holds great promise for harnessing natural energy and disease treatment.
Multifunctional Double‐Layer and Dual Drug‐Loaded Microneedle Patch Promotes Diabetic Wound Healing
Authors: Liu Wei , Zhai Xingxing , Zhao Xue , Cai Yongjie , Zhang Xinmei , Xu Kai , Weng Jie , Li Jianshu , Chen Xingyu 
Published: April 2023

AbstractChronic nonhealing diabetic wounds are a serious complication of diabetes, with a high morbidity rate that can cause disability or death. The long period of inflammation and dysfunctional angiogenesis are the main reasons for wound‐healing difficulty in diabetes. In this study, a multifunctional double‐layer microneedle (DMN) is constructed to control infection and promote angiogenesis, meeting the multiple demands of the healing process of a diabetic wound. The double‐layer microneedle is consisted in a hyaluronic acid substrate and a mixture of carboxymethyl chitosan and gelatin as the tip. The antibacterial drug tetracycline hydrochloride (TH) is loaded into the substrate of the microneedle to achieve rapid sterilization and promote resistance to external bacterial infections. The microneedle tip loaded with recombinant human epidermal growth factor (rh‐EGF) is inserted into the skin, in response to gelatinase produced by resident microbe and disassociate to achieve the enzymatic response release. The double‐layer drug‐loaded microneedles (DMN@TH/rh‐EGF) have antibacterial and antioxidant effects, and promote cell migration and angiogenesis in vitro. In an in vivo diabetic wound model, using rats, the DMN@TH/rh‐EGF patch is able to inhibit inflammation, promote angiogenesis, collagen deposition, and tissue regeneration during the wound healing process, promoting its healing.
Gelatin Methacryloyl Hydrogel, from Standardization, Performance, to Biomedical Application
Authors: He Jing , Sun Yuan , Gao Qing , He Chanfan , Yao Ke , Wang Tongyao , Xie Mingjun , Yu Kang , Nie Jing , Chen Yuewei , He Yong 
Published: April 2023

AbstractGelatin methacryloyl (GelMA), a photocurable hydrogel, is widely used in 3D culture, particularly in 3D bioprinting, due to its high biocompatibility, tunable physicochemical properties, and excellent formability. However, as the properties and performances of GelMA vary under different synthetic conditions, there is a lack of standardization, leading to conflicting results. In this study, a uniform standard is established to understand and enhance GelMA applications. First, the basic concept of GelMA and the density of the molecular network (DMN) are defined. Second, two properties, degrees of substitution and ratio of solid content, as the main measurable parameters determining the DMN are used. Third, the mechanisms and relationships between DMN and its performance in various applications in terms of porosity, viscosity, formability, mechanical strength, swelling, biodegradation, and cytocompatibility are theoretically explained. The main questions that are answered: what does performance mean, why is it important, how to optimize the basic parameters to improve the performance, and how to characterize it reasonably and accurately? Finally, it is hoped that this knowledge will eliminate the need for researchers to conduct tedious and repetitive pre‐experiments, enable easy communication for achievements between groups under the same standard, and fully explore the potential of the GelMA hydrogel.
Pancreatic Tumor‐Targeting Stemsome Therapeutics
Authors: Park Jun‐Young , Park Jun Young , Jeong Yong‐Gyu , Park Joo‐Hwan , Park Yeon Ho , Kim Sang‐Hyun , Khang Dongwoo 
Published: April 2023

AbstractOwing to the intrinsic ability of stem cells to target the tumor environment, stem‐cell‐membrane‐functionalized nanocarriers can target and load active anticancer drugs. In this work, a strategy that focuses on stem cells that self‐target pancreatic cancer cells is developed. In particular, malignant deep tumors such as pancreatic cancer cells, one of the intractable tumors that currently have no successful clinical strategy, are available for targeting and destruction. By gaining the targeting ability of stem cells against pancreatic tumor cells, stem cell membranes can encapsulate nano‐polylactide‐co‐glycolide loaded with doxorubicin to target and reduce deep pancreatic tumor tissues. Considering the lack of known target proteins on pancreatic tumor cells, the suggested platform technology can be utilized for targeting any malignant tumors in which surface target receptors are unavailable.
Efficient, Ambient‐Stable, All‐Polymer Organic Photodetector for Machine Learning‐Promoted Intelligent Monitoring of Indoor Plant Growth
Authors: Jiang Bing‐Huang , Lin Di‐Wen , Shiu Ming‐Neng , Su Yu‐Wei , Tsai Tsung‐Han , Tsai Pei‐Hsun , Shieh Tien‐Shou , Chan Choon Kit , Lu Jong‐Hong , Chen Chih‐Ping 
Published: April 2023

AbstractThe blend ratio and thickness of the PM6:PY‐IT active layer are optimized to realize highly efficient all‐polymer organic photodetectors (OPDs). Ultralow dark current densities of less than 5.92 × 10−10A cm−2(at −1 V) appear when the PM6:PY‐IT active layers have thicknesses in the range of 250–400 nm and blend ratios between 1:1 and 1:1.4, suggesting a wide fabrication window. Fast rise/fall times of 560/250 ns are measured with a cut‐off frequency of 530 kHz for the OPD incorporating a 250‐nm‐thick 1:1 blend. This OPD provides superior performance, with a high detectivity of 2.98 × 1013Jones and a wide linear dynamic range of 138 dB (at 530 nm (−1 V)). In addition, the ultralow dark current of the OPD retains excellent long‐term stability over 500 h of aging testing (thermal stress, ambient conditions, and continuous illumination). With the integration of specific light filters, a system is realized for the efficient detection of indoor plant‐growth lighting, allowing the rapid and accurate detection (>97%) of photosynthetic photon flux at various wavelengths of light that directly determine the photosynthesis and photomorphogenesis of indoor plants, supervised by machine learning. The artificial intelligence‐trained OPD effectively improves detection accuracy.
Photonic Bandgap and Excitation Wavelength Modulated Multicolor Upconverted Circularly Polarized Luminescence in Liquid Crystal Microcapsule
Authors: Jiang Chengyu , Shi Yonghong , Yang Xuefeng , Zhao Tonghan , Zhou Jin , Jin Xue , Zhang Yi , Duan Pengfei 
Published: April 2023

AbstractUpconverted circularly polarized luminescence (UC‐CPL) which is coined by integrating two concepts of photon upconversion and circularly polarized luminescence, has aroused enormous attention from scientists owing to the great performance and potential applications in various fields. To date, although various types of UC‐CPL systems are reported, constructing a UC‐CPL system with multicolor emission remains a big challenge. In this work, by incorporating lanthanide‐doped upconversion nanoparticles (UCNPs) into chiral nematic liquid crystal (N*LC), multicolor UC‐CPL emission can be realized upon two kinds of modulations: the regulation of photonic bandgap (PBG) and adjustment of excitation wavelength of the doped UCNPs. More importantly, this kind of multicolor UC‐CPL system can be used as internal materials for constructing polymer‐shell microcapsules. The PBG effect can still be well preserved in the microcapsules, providing a kind of easy processable luminescent material with multicolor UC‐CPL properties, which can be used as an advanced anti‐counterfeiting material.
Visible Light‐Assisted Direct C−H Acyloxylation of Polycyclic Aromatic Hydrocarbons using Carboxylic Acids
Authors: K. Jha Dhiraj , Sakkani Nagaraju , Zhao John C.‐G. 
Published: April 2023

AbstractThe direct C−H acyloxylation of polycyclic aromatic hydrocarbons (PAHs) with carboxylic acids as the acyloxylating agents was achieved via the electron‐donor‐acceptor (EDA) complexes between PAHs and N‐iodosuccinimide (NIS). This visible light‐assisted metal‐free C−H acyloxylation reaction provides an easy access to the desired aryl carboxylates from readily available PAHs and aliphatic and aromatic carboxylic acids under mild reaction conditions.magnified image
Bioinspired Soft Elastic Metamaterials for Reconstruction of Natural Hearing
Authors: Tang Hanchuan , Zhang Shujie , Tian Ye , Kang Tianyu , Zhou Cheng , Yang Shuaikang , Liu Ying , Liu Xurui , Chen Qicai , Xiao Hongjun , Chen Wei , Zang Jianfeng 
Published: April 2023

AbstractNatural hearing which means hearing naturally like normal people is critical for patients with hearing loss to participate in life. Cochlear implants have enabled numerous severe hearing loss patients to hear voice functionally, while cochlear implant users can hardly distinguish different tones or appreciate music subject to the absence of rate coding and insufficient frequency channels. Here a bioinspired soft elastic metamaterial that reproduces the shape and key functions of the human cochlea is reported. Inspired by human cochlea, the metamaterials are designed to possess graded microstructures with high effective refractive index distributed on a spiral shape to implement position‐related frequency demultiplexing, passive sound enhancements of 10 times, and high‐speed parallel processing of 168‐channel sound/piezoelectric signals. Besides, it is demonstrated that natural hearing artificial cochlea has fine frequency resolution up to 30 Hz, a wide audible range from 150–12 000 Hz, and a considerable output voltage that can activate the auditory pathway in mice. This work blazes a promising trail for reconstruction of natural hearing in patients with severe hearing loss.