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In the era of artificial intelligence and Internet of Things, data storage has an important impact on the future development direction of data analysis. Resistive random-access memory (RRAM) devices are the research hotspot in the era of artificial intelligence and Internet of Things. Perovskite-type rare-earth metal oxides are common functional materials and considered promising candidates for RRAM devices because their interesting electronic properties depend on the interaction between oxygen ions, transition metals, and rare-earth metals. LaCoO3, NdCoO3, and SmCoO3 are typical rare-earth cobaltates (RCoO3). These perovskite materials were fabricated by electrospinning and the calcination method. The aim of this study was to investigate the resistive switching effect in the RCoO3 structure. The oxygen vacancies in RCoO3 are helpful to form conductive filaments, which dominates the resistance transition mechanism of Pt/RCoO3/Pt. The electronic properties of RCoO3 were investigated, including the barrier height and the shape of the conductive filaments. This study confirmed the potential application of LaCoO3, NdCoO3, and SmCoO3 in memory storage devices.

Herein, an ultra-sensitive and facile electrochemical biosensor for procalcitonin (PCT) detection was developed based on NiCoP/g-C3N4 nanocomposites. Firstly, NiCoP/g-C3N4 nanocomposites were synthesized using hydrothermal methods and then functionalized on the electrode surface by π-π stacking. Afterward, the monoclonal antibody that can specifically capture the PCT was successfully linked onto the surface of the nanocomposites with a 1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) and N-Hydroxysuccinimide (NHS) condensation reaction. Finally, the modified sensor was employed for the electrochemical analysis of PCT using differential Pulse Voltammetry(DPV). Notably, the larger surface area of g-C3N4 and the higher electron transfer capacity of NiCoP/g-C3N4 endow this sensor with a wider detection range (1 ag/mL to 10 ng/mL) and an ultra-low limit of detection (0.6 ag/mL, S/N = 3). In addition, this strategy was also successfully applied to the detection of PCT in the diluted human serum sample, demonstrating that the developed immunosensors have the potential for application in clinical testing.

The lithium-sulfur battery has garnered significant attention from both researchers and industry due to its exceptional energy density and capacity. However, the conventional liquid electrolyte poses safety concerns due to its low boiling point, hence, research on liquid electrolytes has gradually shifted towards solid electrolytes. The polymer electrolyte exhibits significant potential for packaging flexible batteries with high energy density owing to its exceptional flexibility and processability, but it also has inherent disadvantages such as poor ionic conductivity, high crystallinity, and lack of active groups. This article critically examines recent literature to explore two types of polymer electrolytes, namely gel polymer electrolyte and solid polymer electrolyte. It analyzes the impact of polymers on the formation of lithium dendrites, addresses the challenges posed by multiple interfaces, and investigates the underlying causes of capacity decay in polymer solid-state batteries. Clarifying the current progress and summarizing the specific challenges encountered by polymer-based electrolytes will significantly contribute to the development of polymer-based lithium-sulfur battery. Finally, the challenges and prospects of certain polymer solid electrolytes in lithium-sulfur battery are examined, thereby facilitating the commercialization of solid polymer electrolytes.

The slow kinetics and irreversibility of Li2S deposition and dissolution during the sulfur reduction/evolution reactions (SRR/SER) hinder the fast‐charging and high‐rate capabilities of lithium–sulfur (Li/S) batteries. To address this challenge, we design a zirconia membrane reactor (ZMR) composed of ZrO2/N‐doped carbon nanofibers (ZONC) to kinetically regulate the interfacial reversible conversion of Li2S. Electrochemical measurements, in situ x‐ray diffraction, and density functional theory calculations are employed to investigate the confinement catalysis of ZMR and elucidate the Li2S activation mechanism for enhanced rate performance and cycling stability. Operating at the cathode side, the ZMR enables the Li/S cell to deliver an initial discharge specific capacity of 1460.8 mAh g−1 at 0.1 C (corresponding to a sulfur utilization of approximately 87.2%), a high‐rate capability of 931.4 mAh g−1 at 5 C, and a capacity retention of 91.0% after 200 cycles at 3 C. Moreover, when a sandwich configuration module (ZMR‐S‐ZMR) is fabricated to support a high‐sulfur‐loading cathode, the resulting Li/S coin cell with a sulfur loading of 12.0 mg cm−2 achieves a remarkable areal capacity of 8.6 mAh cm−2 and 94.2% capacity retention after 90 cycles at 0.1 C (2.2 mA). Sluggish Li2S precipitation/dissolution kinetics and poor interfacial reversibility critically hinder the rate performance and cycling stability of Li/S batteries. Here, we design a zirconia membrane reactor (ZMR) composed of ZrO2/N‐doped carbon nanofibers (ZONC) to precisely modulate the SRR/SER kinetics and reversibility—especially the rate‐determining Li2S precipitation/dissolution step—and applied as a Li/S conversion membrane reactor to enhance rate capability and cycling stability in fast‐charging Li/S batteries. Furthermore, a sandwich‐structured configuration (ZMR‐S‐ZMR) effectively constructs high‐sulfur‐loading cathodes, offering a promising strategy toward practical Li/S batteries.

Efficient use of natural gas to produce aromatics is an attractive subject; the process requires catalysts that possess high-performance active sites to activate stable C–H bonds. Here, we report a facile synthetic strategy to modify HMCM-49 with small molybdenum oxide nanoparticles. Due to the higher sublimability of nano-MoO3 particles than commercial MoO3, they more easily enter into the channels of HMCM-49 and associate with Brønsted acid sites to form active MoCx-type species under calcination and reaction conditions. Compared with commercial MoO3 modified MCM-49, nano-MoO3 modified MCM-49 exhibits higher methane conversion (13.2%), higher aromatics yield (9.1%), and better stability for the methane aromatization reaction.

The reasonable design of metal–organic framework (MOF)–derived nanomaterial has important meaning in increasing the enrichment efficiency in the study of protein phosphorylation. In this work, a polyoxometalate (POM) functionalized magnetic MOF nanomaterial (Fe3O4@MIL-125-POM) was designed and fabricated. The nanomaterial with multi-affinity sites (unsaturated metal sites and metal oxide clusters) was used for the enrichment of phosphopeptides. Fe3O4@MIL-125-POM had high-efficient enrichment performance towards phosphopeptides (selectivity, a mass ratio of bovine serum albumin/α-casein/β-casein at 5000:1:1; sensitivity, 0.1 fmol; satisfactory repeatability, ten times). Furthermore, Fe3O4@MIL-125-POM was employed to enrich phosphopeptides from non-fat milk digests, saliva, serum, and A549 cell lysate. The enrichment results illustrated the great potential of Fe3O4@MIL-125-POM for efficient identification of low-abundance phosphopeptides.

The electrospun light rare earth orthochromites RCrO 3 (R = La, Pr, Nd, Sm, Eu) nanofibers have perovskite-type orthorhombic structures. Raman spectra proved the typical vibration modes of the rotation, bending, and stretching of the CrO 6 octahedra in RCrO 3 nanofibers. The rare earth element with large ion radius, low electronegativity, and remarkable affinity for oxygen, and the rich redox reaction of Cr endow RCrO 3 a potential energy storage material for supercapacitors. It is highly significant to investigate the electrochemical properties of RCrO 3 . The electrochemical properties of the RCrO 3 nanofibers as supercapacitor electrodes were elucidated. At 0.5 A/g, the LaCrO 3 , PrCrO 3 , NdCrO 3 , SmCrO 3 , and EuCrO 3 nanofibers exhibited the specific capacitance values of 267.8, 132.8, 157.6, 170.5, and 170.4 F/g, respectively. First-principles density functional theory method was used to clarify the electronic structure and total density of states of the RCrO 3 nanofibers. This study provides a rational design and fabrication method to pseudocapacitor electrodes.

Uniform rare earth orthoferrites (PrFeO 3 and EuFeO 3 ) nanofibers have been synthesized. The fabricated samples possessed an orthorhombic perovskite structure. The average diameters of PrFeO 3 and EuFeO 3 samples were approximately 233 and 176 nm, respectively, and the morphologies were uniform and continuous nanofibrous structures. The pseudocapacitive performances of PrFeO 3 /EuFeO 3 were attributable to the oxidation-reduction reactions of Fe 3+ /Fe 4+ and Fe(CN) 6 3− / Fe(CN) 6 4− . PrFeO 3 and EuFeO 3 nanofibers showed the specific capacitances of 123 and 143 F g −1 at 1 A g −1 , respectively. The magnetic properties of PrFeO 3 and EuFeO 3 nanofibers were investigated. PrFeO 3 nanofibers presented stable magnetic behaviors. EuFeO 3 nanofibers showed a spin-glass state transition phenomenon. This research suggested that PrFeO 3 and EuFeO 3 nanofibers could be effectively and feasibly applied in supercapacitors and condensed matter physics.

Cerium-based CeMO3 (M = Co, Ni, Cu) perovskites were efficiently synthesized by electrospinning process. The structures, morphologies, elemental compositions, and valence states of CeMO3 perovskites were manifested in detail using X-ray diffraction analysis, Raman spectroscopic analysis, UV–vis diffuse reflectance spectroscopy, scanning electron microscope, transmission electron microscope, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy, respectively. The tolerance factor (t) was accurately calculated to confirm the perovskite structure stability. The electrochemical properties of CeMO3 perovskites were investigated, and the specific capacitances of CeCoO3, CeNiO3, and CeCuO3 perovskites are 128, 189, and 117 F g−1 at the current density of 0.5 A g−1, respectively. This study could provide an efficient and potential applications of the cerium-based perovskites into the supercapacitor electrode materials.

In the era of artificial intelligence and Internet of Things, data storage has an important impact on the future development direction of data analysis. Resistive random-access memory (RRAM) devices are the research hotspot in the era of artificial intelligence and Internet of Things. Perovskite-type rare-earth metal oxides are common functional materials and considered promising candidates for RRAM devices because their interesting electronic properties depend on the interaction between oxygen ions, transition metals, and rare-earth metals. LaCoO[sub.3], NdCoO[sub.3], and SmCoO[sub.3] are typical rare-earth cobaltates (RCoO[sub.3]). These perovskite materials were fabricated by electrospinning and the calcination method. The aim of this study was to investigate the resistive switching effect in the RCoO[sub.3] structure. The oxygen vacancies in RCoO[sub.3] are helpful to form conductive filaments, which dominates the resistance transition mechanism of Pt/RCoO[sub.3]/Pt. The electronic properties of RCoO[sub.3] were investigated, including the barrier height and the shape of the conductive filaments. This study confirmed the potential application of LaCoO[sub.3], NdCoO[sub.3], and SmCoO[sub.3] in memory storage devices.