JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 4.4
Zhang Wanying,Dou Feng,Wang Shuhong,Wang Cheng
Multi-level storage is an effective way to increase storage density compared to binary storage. In this study, a D–A copolymer containing two different electron-withdrawing receptors was designed and synthesized, and the polymer was applied to resistive random access memory (RRAM), which exhibited flash-type ternary memory behaviour. In addition, Cu nanoparticles (NPs) were embedded in the polymer to improve the prepared storage performance. In addition, Cu NPs were embedded in the polymer to improve the prepared storage performance. The memory devices based on PCz–BB:Cu nanocomposites also exhibit flash memory performance with a threshold voltage drop from − 1.05/ − 1.95 to − 0.45V/ − 0.90V, an ON2/ON1/OFF current ratio increase from 1905:15:1 to a boost of 8950:50:1, and the three resistive states of the devices being stable for more than 3h and 10 4 cycles. The mechanism of resistive switching is explained in terms of charge trapping and conducting filament theory. This work contributes to the rational design and fabrication of high-density storage materials.
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ACS Nanoscience Au
·
2026
·
IF 7.5
Yang Shijin,Fang Qi,Tang Jing,Ge Jianping
Copper-based metal–organic composites are promising
catalysts
for electrochemical CO 2 reduction reaction (eCO 2 RR). However, it is difficult to prepare stable Cu + active
sites in a controllable way and maintain them in the catalytic reduction.
In this work, a (CuPA-Ag)/Cu electrode was prepared by the ion sputtering
of Ag NPs on the copper foil, followed by the in situ growth of Ag
NP-grafted CuPA NBs on its surface. The electrode possessed a large
amount of Cu + active sites due to the strong σ-donation
and π-backdonation interactions between the phenylacetylene
ligand and Cu + , which significantly improved the catalytic
performances. Using the optimized electrode and reaction conditions,
the eCO 2 RR achieved Faraday efficiencies of 44.5% for C 2 H 4 and 56.5% for C 2+ products in the
H cell. With periodic supplementation of the CO 2 source,
the eCO 2 RR maintained an FE C 2 H 4 above 40% for 11 h. Its superior catalytic performance originated
from the densely stacked nanobelt structures with a large electrochemical
surface area and enhanced electron transfer, the synergistic effect
between Ag and Cu + to promote the CO 2 absorption
and C–C coupling, and the hydrophobicity of CuPA to inhibit
the hydrogen evolution reaction.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Qifang Zheng,Lidong Qiao,Peilun Shen,Tianfu Zhang,Liuyang Dong,Dianwen Liu
Both scheelite and calcite were calcium-containing oxidized minerals with similar calcium active sites, which leads to a lack of selectivity in the adsorption of collectors. Moreover, their surface chemical and solution chemical properties were similar, which makes their flotation separation extremely challenging. In this study, vanillic acid (VA) was used as a depressant for the flotation separation of scheelite and calcite. However, the difference in recovery of these two minerals was small, making it difficult to achieve effective flotation separation. The synergistic effects of Fe 3+ , Cu 2+ , and Al 3+ with VA were further investigated. It was found that Fe 3+ and Al 3+ had poor depressive effects on calcite in the presence of VA, while Cu 2+ showed the best selectively depressive effect on calcite. When the molar mass ratio of Cu 2+ to VA was 5:1 and the pH was 9.5, the flotation recovery of scheelite and calcite were 88.3 and 3.18 %, respectively. Effective flotation separation of scheelite and calcite was achieved. In addition, the selective depression mechanism of Cu 2+ and VA on scheelite was revealed. In the slurry, VA existed in the form of anions L 2– and HL – . The addition of Cu 2+ significantly improved the adsorption environment of VA on the calcite surface. Cu 2+ could form metal complexes such as CuL and CuHL + with VA. These metal complexes could selectively chemically adsorb on the oxygen atom positions on the calcite surface, resulting in strong depression of calcite. This research provides a new method for the green flotation separation of scheelite and calcite, which has potential industrial application value.
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Nanomaterials
·
2025
·Vol. 15
·期 21
·1629
·
IF 4.3
Zuoquan Tan,Xianqin Xing,Yimei Fang,Le Huang,Shunqing Wu,Zhiyong Zhang,Le Wang,Xiangping Chen,Shanshan Chen
Direct growth of high-quality, Bernal-stacked bilayer graphene (BLG) on dielectric substrates is crucial for electronic and optoelectronic devices, yet it remains hindered by poor film quality, uncontrollable thickness, and high-density grain boundaries. In this work, a facile, catalyst-assisted method to grow high-quality, single-crystalline BLG directly on dielectric substrates (SiO2/Si, sapphire, and quartz) was demonstrated. A single-crystal monolayer graphene template was first employed as a seed layer to facilitate the homoepitaxial synthesis of single-crystalline BLG directly on insulating substrates. Nanostructure Cu powders were used as the remote catalysis to provide long-lasting catalytic activity during the graphene growth. Transmission electron microscopy confirms the single-crystalline nature of the resulting BLG domains, which validates the superiority of the homoepitaxial growth technique. Raman spectroscopy and electrical measurement results indicate that the quality of the as-grown BLG is comparable to that on metal substrate surfaces. Field-effect transistors fabricated directly on the as-grown BLG/SiO2/Si showed a room temperature carrier mobility as high as 2297 ± 3 cm2V−1s−1, which is comparable to BLG grown on Cu and much higher than that reported on in-sulators.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Yan Zhou,Cheng Yi,Xiaohui Ning
Liquid metal batteries (LMBs) are emerging as a promising energy storage solution owing to their inherent safety, low cost, and long lifespan. Bismuth (Bi) offers excellent cycle stability but is hindered by sluggish electrode kinetics due to the formation of compact and poorly conductive intermetallics at high rates. Here, we construct an electronically networked architecture to overcome this limitation by incorporating little copper (Cu) into a Bi electrode. This innovative design enhances electrical conductivity and reduces the ion diffusion energy barrier, affording dramatically improved electrochemical performance. Our Li‖Bi96Cu4 cell demonstrates superior high-rate capability, delivering 85.50% of the theoretical capacity at 3C, a substantial improvement compared to 57.50% of the Li‖Bi cell. Furthermore, it exhibits unprecedented cyclability without noticeable capacity degradation over 4000 cycles, a performance unparalleled by other reported LMB chemistries. This facile and effective Cu doping modification provides a transformative approach to enhance Bi electrode kinetics, offering a new paradigm for advanced electrode design for LMBs.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 7
·1-12
·
IF 5.3
Hu Fuqiang,Cai Taimei,Zhu Wenting,Peng Hailong
A porous double variable-valence FeCe nanozyme (pFeCezyme) was designed using hemoglobin as template and Fe-source. pFeCezyme exhibited excellent peroxidase (POD)-like activity due to the porous structure, maximized exposure of active sites, synergy of double variable-valence metals, and enhanced electron transfer between Fe and Ce. The POD-like activity can be quenched (off) by l -cysteine ( l -Cys) and then restored (on) by adding of heavy metal ions (HMIs). The degree effect of “on–off” POD-like activity can be varied by changing pH conditions. Therefore, a three-channels pFeCezyme sensor array was established using pH values (pH = 4.0, 5.0, and 6.0) as sensing elements. Interestingly, pFeCezyme sensor array can generate distinct colorimetric fingerprints due to the different affinity ability between l -Cys and HMIs. The pFeCezyme sensor array was successfully applied to highly sensitive and high throughput discrimination of HMIs (Ag + , Hg 2+ , Cu 2+ , Cr 6+ , and Fe 3+ ) even at low concentration of 0.1 μM. Meanwhile, The pFeCezyme sensor array can rapidly distinguish binary and ternary mixed HMIs within 10 min, and the HMIs and interfering substances can be well discriminated. Furthermore, the pFeCezyme sensor array could effectively distinguished HMIs in real samples with an excellent identification for unknow HMIs. This research provides a novel strategy for identifying a variety of HMIs, which exhibits a broad application prospect in HMIs monitoring. Graphical
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ELECTROANALYSIS
·
2026
·Vol. 38
·期 1
·e70099
·
IF 2.3
Yang Chen,Xuening Wang,Huimin Si,Zhiping Sun,Qianyun Yu,Xihong Song,Ying Liu,Chuanbo Yan,Kai Yu
The increasing heavy metal pollution in marine environments has highlighted the urgent need for rapid, on-site detection methods. In this study, a reduced graphene oxide (rGO) and carboxylated multiwalled carbon nanotube (MWCNTs-COOH)-modified screen-printed electrode (SPE) was coupled with a portable electrochemical workstation for on-site detection of Pb 2+ and Cd 2+ in seawater. The key influencing factors involved in the detection process, such as deposition potential, deposition time, and pH value, have been systematically optimized. The response surface methodology (RSM) was applied to refine the portable electrochemical workstation parameters, including step potential, frequency, and pulse amplitude. The detection capability for heavy metals was significantly enhanced by using square wave stripping voltammetry (SWASV) with in situ Hg-Bi film plating, achieving detection limits of 0.4 μg/L for Pb 2+ and 0.8 μg/L for Cd 2+ . Finally, the portable workstation together with rGO/MWCNTs-COOH/SPE showed recovery rates of 101.33 ± 3.42% ~ 115.85 ± 3.50% for Pb 2+ and 101.32 ± 2.23% ~ 102.00 ± 2.00% for Cd 2+ in real seawater. The results were in good agreement with those obtained by inductively coupled plasma mass spectrometry (ICP-MS), thereby validating the detection accuracy of this platform.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 7.7
Huikai Lin,Caiyi Du,Ningyi Xu,Yiru Wang,Chunyan Sun
CRISPR/Cas12a can activate trans-cleavage activity upon single-stranded DNA binding, making it widely applicable in highly sensitive fluorescent biosensors. Sensors utilizing monochromatic fluorescence output modes are susceptible to interference from multiple factors, resulting in unstable detection methods. To address this, we designed a ratio-based fluorescence sensor for detecting tetracyclines (TCs) based on the synergistic signal amplification of nucleic acid aptamer (42TET) and zirconium-based metal-organic framework (PCN-224) with CRISPR/Cas12a. PCN-224 adsorbs single-stranded DNA, quenching its FAM-labeled fluorescence while simultaneously emitting its own fluorescent signal. This dual-fluorescence output reduces background interference and enhances detection accuracy. By designing an activator as a complementary sequence (cDNA) to the nucleic acid aptamer, the system binds to 42TET in the presence of tetracycline, releasing the cDNA to activate the CRISPR/Cas12a system. Through this system's signal amplification capability, highly sensitive detection of tetracycline is achieved, with a detection limit reaching 8.7 nM. It possesses the same detection capabilities as traditional HPLC detection methods. This method is simple, rapid, efficient, and highly quantitative, offering broad prospects for future applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.7
Yifan Duan,Xin Zhang,Zhanpeng Xu,Haifang Shi,Weichao Zou,Qiang Liu,Feng Zhang,Zhecun Wang
Efficient and rapid cleanup of offshore oil spills remains a significant global challenge, primarily due to the high viscosity and low fluidity of most crude oils. Herein, a functional engineered Janus copper foam, integrating special asymmetric wettability and efficient photothermal properties, is constructed via a controllable surface/interface engineering strategy. The surface temperature of the copper foam rises rapidly under light irradiation, thereby reducing the viscosity of the contacting crude oil in situ. Simultaneously, the special oleophobic/oleophilic asymmetric wettability generates a strong internal driving force via a surface energy gradient, which facilitates the unidirectional transport of crude oil. By combining directional transport with photothermal properties, this engineered Janus system enables rapid adsorption and collection of offshore crude oil. Furthermore, integrated with a peristaltic pump to form a “self-heating vacuum cleaner” system, the photothermal Janus copper foam achieves continuous and efficient cleanup of crude oil from seawater.
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Nature Communications
·
2026
·Vol. 17
·期 1
·357
·
IF 15.7
Luo Huayu,Cai Zimo,Yang Geng,Ye Kangjie,Tang Jian,Liu Tao,He Long,Zhang Ying,Zhu Yi,Xie Haibo,Nan Kewang,Yang Huayong,Dickey Michael D.,Xu Kaichen
Permeable textiles show great potential for daily wearable electronics. As crucial electronic components, rigid chips suffer from modulus mismatch with elastic textile substrates, hindering the development of stretchable hybrid electronics. Herein, we report laser-programmed textile hybrid electronics (LPTHE) featuring seamless integration of wires and chips onto laser-programmed textiles (LPTs). Through selective and controllable laser-polymer interaction, LPTs are tailored with gradient stiffness and interfacial affinities. The laser-pretreated regions exhibit a modulus increase ranging from 2.7-fold to 14.9-fold, while maintaining permeability and biological safety. Such LPT provides stretch stability to LPTHE, creating strain isolation between rigid chips and elastic textiles, while also protecting wires on textiles from disconnection and cross-layer short circuits. We demonstrate an LPTHE screen with 5 × 5 light-emitting diodes displaying variable patterns under deformation. Additionally, an untethered stretchable LPTHE patch continuously monitors four health parameters during exercise. The proposed strategy bridges the gap between hybrid electronics and elastic daily textiles.
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ChemCatChem
·
2026
·Vol. 18
·期 16
·e71036
·
IF 4.1
Xiang Gao,Longfei Hong,Yuting Jiang,Yixuan Li,Lian-Hua Xu,Qingyu Liu,Huiyan Zhang,Sheng Chu
Polyolefin plastics, such as polyethylene (PE), possess chemically inert and nonpolar C–C backbones, making them difficult to recycle and causing persistent environmental pollution. The lack of green and highly selective upcycling methods has led to severe environmental concerns and resource waste. Photoelectrocatalysis utilizes high-energy photogenerated charge carriers to directionally upgrade plastic-derived small molecules into value-added chemicals. However, current photoelectrocatalytic technologies still face challenges in processing structurally inert bulk polymer plastics. In this study, we report a hydrothermal-photoelectrocatalytic tandem strategy to realize the upcycling of PE and other polyolefin plastics. The acetic acid product obtained from hydrothermal treatment are further converted into ethanol over an Au nanoparticle‑decorated GaN/Si (Au/GaN/Si) photocathode, achieving an optimal performance of a Faradaic efficiency of 57.6%. This tandem strategy also demonstrates excellent generality in the conversion of polypropylene (PP) and polyvinyl chloride (PVC), providing a green route for the upcycling of polyolefin plastics. Graphical Hydrothermal-photoelectrocatalytic tandem upcycling enables the conversion of chemically inert polyolefin plastics into value-added ethanol. The Au/GaN/Si photocathode achieves a Faradaic efficiency of 57.6% for ethanol production, while demonstrating broad applicability to PE, PP, and PVC plastics.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Zhixuan Yu,Jinxing Chen,Daiyong Chao,Xiaoxuan Sun,Ling Liu,Shaojun Dong
Conversing proteinaceous enzyme behavior into nanomaterials is intriguing academically, but the threshold from mimicry to accessing sophisticated biological entities has not yet been crossed. Herein, we disclosed the pan-glycoside hydrolases-like (p-GHs-like) activities of Cu 3 P and Cu 2 O nanoparticles and decently confirmed their consistent catalytic mechanism as natural glycoside hydrolase, that is, the precise bond breaking, anomeric carbon configuration and catalytic attack mode. We then introduced p-GHs-like NPs into Escherichia coli to establish a feedback regulatory model for the β- D -glucuronidase (expressed by uidA) that was initially expressed in trace amounts. An upregulation of uidA from 72 to 1000 counts was induced by the p-GHs-like activities via pre-released β-glucuronides derivatives, further contributing to 1–2 orders enhancement of the enzyme production. We unearthed the specific catalytic mechanism to unlock a black box of enzyme-like inorganic feedback on the natural enzyme synthesis process, pushing mimicry leaped to physiological behavior.
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