SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Youwei Wang,Hehu Zhang,Enbo Nian,Weili Wang,Jiayi Qiao,Haoyang Yu,Lingling Lu,Ying Chen,Ang Wu,Chuanan Yao,Xiushan Wang
To address the issues of significant subjective errors and high susceptibility to interference from environmental factors and application scenarios in traditional colorimetry, and digital colorimetry for detecting pH and free chlorine. The present study innovatively proposes a detection method. This integrating digital image colorimetry with convolutional neural network (CNN). A portable, accurate, and efficient multi-angle rapid detection platform was developed, and the visualization of the detection process and results was realized via an APP with a built-in CNN model. Compared with the traditional fixed-angle detection method, multi-angle rotation detection effectively reduces the maximum detection error. For water sample detection within pH range of 6–9 and a free chlorine range of 0–5 ppm, the maximum detection error was 0.06 for pH and 0.09 ppm for free chlorine, with a response time of 1.2 s for both. The regression coefficients reached 0.9989 and 0.9987, respectively. With low detection errors, this method enables the rapid and accurate detection of water pH value and free chlorine content. This study provides new insights and a theoretical basis for the design and development of water quality detection equipment, and offers guiding significance for promoting technological upgrading and equipment innovation in the field of water quality detection.
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Journal of Energy Storage
·
2025
·
IF 9.8
Peigen Zhang,Tianyu Wang,Pei Ding,Feiyue Hu,Zhenglin Zou,Wei He,Vamsi Borra,Qinning Gao,Hanning Zhang,Jingwen Tang,Wei Zheng,ZhengMing Sun
Aqueous zinc-ion batteries (AZIBs) offer high safety, low cost, and environmental compatibility, yet their large-scale deployment is hindered by dendrite growth and severe side reactions arising from non-uniform Zn 2+ deposition. Constructing artificial interphase layers (AILs) to regulate Zn 2+ nucleation and growth has emerged as an effective strategy to mitigate these issues. One-dimensional (1D) Sn metal, featuring a high specific surface area, tunable structure, strong zinc affinity, and high hydrogen evolution overpotential, is an ideal candidate for interphase engineering. However, existing synthesis methods for 1D Sn, which rely on template-assisted electrodeposition, face challenges in scalability. In this work, Sn whiskers are synthesized via the mechanochemical decomposition of the Ti 2 SnC MAX phase and employed to construct a three-dimensional (3D) Sn whisker network as an artificial interphase layer on zinc anodes (Sn whisker@Zn). This continuous network effectively guides Zn 2+ migration and deposition, promotes preferential growth along the (002) crystal plane, reduces local current density, and suppresses dendrite formation. Simultaneously, it retards corrosion and inhibits the formation of by-products. Symmetric cells based on Sn whisker@Zn anodes exhibit exceptional cycling stability, sustaining over 1600 h of stable operation at 1 mA cm −2 with a capacity of 0.5 mAh cm −2 , and exceeding 1000 h at a high current density of 10 mA cm −2 . Moreover, the Sn whisker@Zn||NH 4 V 4 O 10 full cell retains 89.94 % of its capacity after 1400 cycles at 5 A g −1 , demonstrating strong application potential. This approach provides a scalable and effective strategy for developing durable zinc anodes, advancing the prospects of AZIBs in energy storage systems.
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Nature Protocols
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2025
·
IF 16
Xu Ziye,Wang Yuting,Cai Wenjie,Chen Yu,Wang Yongcheng
Bacteria colonize nearly every part of the human body and various environments, displaying remarkable diversity. Traditional population-level transcriptomics measurements provide only average population behaviors, often overlooking the heterogeneity within bacterial communities. To address this limitation, we have developed a droplet-based, high-throughput single-microorganism RNA sequencing method (smRandom-seq) that offers highly species specific and sensitive gene detection. Here we detail procedures for microbial sample preprocessing, in situ preindexed cDNA synthesis, in situ poly(dA) tailing, droplet barcoding, ribosomal RNA depletion and library preparation. The main smRandom-seq workflow, including sample processing, in situ reactions and library construction, takes ~2 days. This method features enhanced RNA coverage, reduced doublet rates and minimized ribosomal RNA contamination, thus enabling in-depth analysis of microbial heterogeneity. smRandom-seq is compatible with microorganisms from both laboratory cultures and complex microbial community samples, making it well suited for constructing single-microorganism transcriptomic atlases of bacterial strains and diverse microbial communities. This Protocol requires experience in molecular biology and RNA sequencing techniques, and it holds promising potential for researchers investigating bacterial resistance, microbiome heterogeneity and host–microorganism interactions.
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PubMed
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
Yinkun Liao,Yibo Hu,Yuanhao Zhou,Jingkun Chen,Xue Yang,Meng Gu,Kuan Ren,Jingtai Zhao,Qianli Li,He Feng
Copper halide scintillation materials with self-trapped exciton (STE) photoluminescence have attracted great interest in the field of optoelectronics. However, it is challenging for Cs3Cu2Br5 materials to achieve wider spectral emission and high spatial resolution X-ray imaging in applications. Herein, combining XRD and energy dispersive spectroscopy results, it is proved that Ag+ is doped into the Cs3Cu2Br5 lattice through an ion doping process, and PL is regulated from 460 nm to 543 nm. By density functional theory calculation, the band gap is reduced from 2.25 eV of Cs3Cu2Br5 to 1.99 eV of Cs3Cu2Br5:Ag, which is also consistent with the spectral redshift. The gradient study of the silver ion concentration from 5% to 35% shows that the best silver ion concentration is 25%. The experimental results show that the doped silver ions can improve the PL, PLE, PLQY, XEL and other properties of the material, such as the PLQY which increased from 27.38% to 90.62%. At the same time, Cs3Cu2Br5:Ag also has good stability, it can be stored in air for 30 days, and its PL intensity remains at 90.73%. The X-ray space of the Cs3Cu2Br5:Ag-UV scintillation film measured in a laboratory imaging system can reach 18.3 lp mm−1.
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Materials Today Physics
·
2025
·
IF 9.7
Guodong Han,Fangyuan Qi,Song Zhao,Yuxiang Jia,Yudeng Wang,Sai Sui,Bo Feng,Jun Wang,Jiafu Wang,Shaobo Qu
The lightweight microwave absorbing materials(MAMs) have always been a research hot topics in the field of electromagnetic waves(EMWs) absorption. In this work, the pineapple peel (PA) was used as a carbon source and combined with Co alloys. The hollow porous carbon of the PA after pyrolysis provides advantage for becoming the lightweight MAMs. When the soaking time of PA-800 in the solution of CoCl 2 •6H 2 O achieves at 60 h, PA-800-60 was successfully prepared which the RL min of −24.8 dB and the EAB reach 5.8 GHz (12.2–18 GHz) at the thickness of only 1.3 mm. In order to improve the effects of impedance matching, the height of 9 mm frustum metastructure based on PA-800-60 was designed and used for improving microwave absorption in the low-frequency range. The EAB has been expanded from 5.8 GHz to 13.5 GHz (3.5–18 GHz) which covers the C, X and Ku band and the RL min reached −17.5 dB at the frequency of 7.44 GHz. Meanwhile, the RCS value of PA-800-60 layer is less than −10 dB m 2 cover the range of −60°–60° and the maximum scattering intensity is only −10 dB m 2 at the thickness of 2 mm. In addition to, the PA-800-60 exhibits superb thermal insulation performance due to abundant air with lower thermal conductivity take place of solid phase with higher thermal conductivity. This work provides a new direction for the research and development of multifunctional electromagnetic metastructures based on the lightweight MAMs.
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LANGMUIR
·
2025
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IF 3.9
Jijun Ding,Pengfei Zhao,Haixia Chen
Flexible pressure sensors have broad prospects in smart wearables, healthcare, and human-computer interaction. Nevertheless, flexible pressure sensors still face numerous thorny challenges. It has become a crucial problem to skillfully design and successfully achieve flexible pressure sensors with both a high sensing range and ultrahigh sensitivity. The sensor is designed and realized with inspiration drawn from the layered microstructure of human skin, and hierarchical structure flexible pressure sensors are fabricated, where PDMS microstructures/MWCNTs act as the top electrode, filter paper/ZnO nanostructures/MWCNTs act as the intermediate active layer, and an Ag interdigitated electrode acts as the bottom electrode. The sensing performance of the sensor is investigated to develop the application of pressure sensors for human health detection in daily life, and a pressure sensor array is prepared to investigate the detection of spatial pressure distribution. Sensors based on paper and PDMS can achieve low-pressure detection (30 Pa), high sensitivity (261.38 kPa–1), fast response time (∼73.8 ms), and excellent cyclic stability (10 000 cycles). Finally, the sensor demonstrates its functionality by lighting up a small lamp, which confirms that the as-prepared pressure sensor has excellent application scenarios and is beneficial for the development of flexible electronic devices.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 7
·1-14
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IF 5.3
Huang Wei,Ren Zhen,Li Xukui,Chen Rong,Fan Dinglin,Da Jingjing,Zha Yan,Xu Yongjie
The use of ultrasmall high-entropy alloys (HEAs, ≈5 nm) with unique catalytic properties, integrating them into lateral flow immunoassay (LFIA) for the detection of Staphylococcus aureus is proposed. Under optimal conditions, the detection limits of the HEAs-based LFIA were 1.5 × 10 3 CFU/mL via direct coloration and 15 CFU/mL using the DAB-enhanced catalytic signal, representing improvements of 10 3 -fold and 10 5 -fold, respectively. The HEAs demonstrated superior performance compared with traditional AuNPs, including enhanced sensitivity and high peroxidase activity (Km = 0.066 M, Vmax = 1.132 × 10 –6 M min −1 ), as well as excellent specificity and repeatability, with relative standard deviation (RSD) of less than 10%. Moreover, the incubation time for HEAs functionalized with antibodies to bind Staphylococcus aureus was only 5 min, compared with 20 min for functionalized AuNPs. The method also showed high specificity, effectively discriminating Staphylococcus aureus from other foodborne pathogens. The HEAs-based LFIA was successfully applied to food sample analysis, including milk and orange juice, demonstrating its robust applicability for real-world detection scenarios. This approach not only lowered the detection limit but also reduced the total detection time, making it a highly promising candidate for on-site detection of Staphylococcus aureus and other foodborne pathogens by simply changing the recognition element. Graphical
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MEASUREMENT
·
2025
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IF 5.6
Xu-guang Hu,Zhan-kun Li,Ju-wei Zhang,Xi-xin Wang,Xiao-ming Chen,Yong Zhao
A label-free fiber-optic optofluidic biosensor integrated into microfluidic chip based on vernier effect is proposed for the specific and high-sensitivity detection of DNA molecules, which is made up of a Michelson interferometer (MI) and a Fabry Perot interferometer (FPI) in parallel. The MI is prepared by a single-hole dual-core micro-structured fiber (MOF) with a suspended core attached to the hole serving as the sensing arm, and used as the sensing element. A micropore is etched directly above the microchannel of MI as the fluid inlet by femtosecond laser processing, and integrated into the microfluidic chip for sample replacement. The detection volume is only nanoliters and the sample can be quickly replaced within seconds. The experimental findings indicate that the proposed optofluidic sensor shows a high refractive index (RI) sensitivity of −8791 nm/RIU and has an ultra-low detection limit of 7.45 × 10 −6 RIU within the range of 1.3328–1.3370. By immobilizing probe DNA (pDNA) molecules on the suspended core through surface functionalization, the optofluidic sensor enables label-free detection of 1 μM complementary DNA (cDNA) solution and shows excellent specificity. The proposed fiber optofluidic biosensor has great development prospects in ultra-low volume and high-sensitivity detection of biomolecules.
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Small
·
2025
·Vol. 21
·期 19
·2500271
·
IF 12.1
Weiyi Li,Bijiao He,Fang Zhang,Yan Xin,Shen Cai,Huajun Tian
Na 2+2x Fe 2–x (SO 4 ) 3 (NFSO) is a promising cathode material for sodium-ion batteries (SIBs) due to its low cost and high operating potential (≈3.8 V). However, poor intrinsic electronic conductivity and sluggish kinetics are major drawbacks to its practical application. Herein, magnesium doped Na 2+2x Fe 2–x (SO 4 ) 3 microspheres (Na 2.54 (Fe 0.97 Mg 0.03 ) 1.73 (SO 4 ) 3 ) are synthesized via a designed spray-drying process. The optimized cathode material (NFSO@C-Mg0.02) possesses excellent rate performance up to 50C (50.8 mAh g −1 at 50C) and long-cycle stability (capacity retention of 78.3% even after 9000 cycles at 10C). Despite an increase in the mass loading to 10 mg cm −2 , the electrode continues to represent a reversible capacity of 72.1 mAh g −1 at 3C. Furthermore, NFSO@C-Mg0.02║HC full cell demonstrates superior cycling stability (80% capacity retention over 8000 cycles at 5C) and high energy density (≈310 Wh kg −1 , based on the cathode). In situ X-ray diffraction (XRD) results reveal that the Mg doping strategy successfully mitigates the variation in lattice volume. The density functional theory (DFT) calculations verify that the prominent rate performance is attributed to the enhanced Na + diffusion kinetics and low ionic-migration energy barrier. This work provides an effective strategy and a fundamental understanding to enhance the electrochemical performance of cathode materials for SIBs.
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FUEL
·
2025
·
IF 7.5
Hongtao Fu,Kaoping Song,Erlong Yang,Lihao Liang,Yu Zhao,Zhehui Jin
Shale oil is an unconventional energy resource, and its efficient development is a key focus of current energy research. China’s continental shale resources are abundant, with high clay content and poor physical properties. The development of shale oil reservoirs after horizontal well fracturing remains suboptimal, requiring further recovery enhancement. Surfactant imbibition oil recovery technology is recognized as one of the effective methods for enhancing oil recovery in unconventional reservoirs. This study proposes a novel experimental apparatus and method for dynamic imbibition, and also develops a three-dimensional (3D) micro pore-fracture dynamic imbibition model. Furthermore, surfactant selection criteria based on wettability and interfacial tension are established. The results show that Cetyltrimethylammonium bromide (CTAB) forms ion pairs on the surface of shale pores, rapidly removing the oil film covering the shale surface. This induces a wettability reversal, reducing the water-phase contact angle from 132° to 55.1°. The use of the CTAB surfactant solution resulted in an 11.5 percentage points improvement in final imbibition efficiency. After CTAB surfactant solution detaches oil droplets from the shale surface, more of the water phase comes into contact with the clay minerals and micro-damage structures in the shale. Hydration induces new micro-damage in the shale, which accumulate and evolve into micro-fractures, creating flow channels for shale oil transport. Another key mechanism for enhancing the dynamic imbibition efficiency of continental shale oil is to modify the shale surface wettability while strategically adjusting interfacial tension. The selection criteria for surfactants used in shale oil dynamic imbibition should require not only wettability alteration capability but also an appropriate interfacial tension ranging from 2 to 10 mN/m. This balances the promoting effect of capillary forces with the suppressing effect of the Jamin effect, thereby facilitating the movement of oil droplets within deformed pores. Significant variations in average pressure within the pores enhance micro dynamic imbibition efficiency in shale. In the practical development of shale oil reservoirs, providing effective short-cycle energy replenishment and altering the average pressure within shale pores are crucial for guiding the enhancement of recovery in continental shale oil reservoirs.
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FUEL
·
2025
·
IF 7.5
Siyu Chen,Zhiyong Chen,Lu Tang,Jimei Xue,Zhijun Wang,Ying Li,Hanjun Wei
Porous heteroatom–doped carbon architectures have emerged as advanced multifunctional microwave absorbers. This study fabricates nitrogen–doped biomass-derived carbon using jackfruit through a coordinated KOH/urea activation–carbonization methodology. The carbonization temperature effectively regulates the porous structure, resulting in the formation of a thin material with a low density and broadband absorption. Upon being incorporated into a paraffin matrix at a 10 wt% loading (J-800 sample), the material exhibits enhanced electromagnetic (EM) wave absorption capabilities: a minimum reflection loss (RL min ) of − 46.3 dB at 1.75 mm, and an effective absorption bandwidth (EAB) of 5.6 GHz (covering the entire Ku band) at a thickness of 1.8 mm. This performance extends to the C-band range, where the material maintains an RL min of −28.9 dB and the EAB delivers 3.8 GHz (4.2−8.0 GHz) coverage across a thickness range of 2.85–5 mm. This nitrogen-doped biomass-derived carbon simultaneously achieves multifunctional superiority, exhibiting an 18.15 dB m 2 radar cross-section reduction, 131.7° hydrophobic surface characteristics, and efficient thermal management properties − stabilizing at 50.5 °C within 15 min under a thermal exposure of 157.5 °C. Concurrent infrared stealth compatibility complements these attributes, confirming that the developed strategy offers a streamlined synthetic route for engineering integrated microwave absorbers with combined EM attenuation, environmental resilience, and multispectral concealment capabilities.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Wenhui Wang,Xinze Liu,Han Yang,Zexi Pei,Weihua Zou
The development of high-performance photothermal materials from sustainable and renewable resources is crucial for advancing solar energy technologies. Herein, we present a green and sustainable strategy for fabricating a novel composite material that leverages abundant biomass and biopolymers. A cellulose-based graphene/hexadecanol composite photothermal conversion material was successfully encapsulated with fully biobased xanthan gum and wood wax oil films (denoted as WTPCM-XW). This design capitalizes on the natural hierarchical structure of delignified wood as a sustainable scaffold, effectively supporting the organic phase change material while avoiding the need for synthetic polymer matrices. The incorporation of graphene enhances photothermal conversion efficiency. Notably, the entire system is designed for minimal environmental impact, utilizing a simple aqueous process and renewable encapsulation agents. The optimal composite material WTPCM10-XW achieves an exceptional photothermal conversion efficiency of 91.6% while demonstrating outstanding dimensional stability and durability. After undergoing a 60 h static water immersion test, the material retained its original shape, exhibiting a tensile force of 928.7 N and a tensile strength of 9.3 MPa. This work provides a sustainable paradigm for designing high-performance energy storage materials from renewable resources, offering significant potential for application in energy-efficient buildings and contributing to a circular economy.
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危险品化学品经营许可证（带存储）