Nature Communications
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2025
·Vol. 16
·期 1
·1-11
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IF 15.7
Gao Jie,Li Jiahui,Miao Lei,Jia Lida,Qiu Pengfei,Yin Tingwei,Zhu Sijing,Yang Xinyu,Guo Jia-Chen,Chen Jun-Liang,Wang Xiaoyang,Nishibori Eiji,Sato Tomohiro,Shi Xun
β -Ag 2 Se holds a great promise for wearable thermoelectric generators due to its good mechanical properties and biocompatibility. However, optimizing its power factor through alterations in the Ag/Se stoichiometric ratio or incorporating secondary phases has reached the limitation. This work adopts a liquid-like sintering strategy, namely employing the migration and precipitation of silver ions from metallic silver to the silver selenide during the spark plasma sintering process to construct significantly sized and coherent Ag-rich nanoprecipitates within flexible Ag/ β -Ag 2 Se composite films, thereby achieving an unprecedented power factor exceeding 4000 μWm −1 K −2 at 303 K. The Ag-rich nanoprecipitates play a crucial role in elevating the carrier concentration, enhancing the density-of-states effective mass, and mitigating carrier scattering caused by phase interfaces and acoustic phonons. The generator containing 5 pieces of optimal films shows an normalized output power density of 10.89 μWcm −1 K −2 under a temperature difference of 26.0 K. This study strongly suggests that the creation of Ag-rich nanoprecipitates is an effective avenue for improving the electrical performance of β -Ag 2 Se-based thermoelectric materials.
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Frontiers in Microbiology
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2025
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IF 4.5
Weimin Ning,Xuefeng Bao,Lei Jiang,Mei Yang,Tianhao Lei,Maoyan Liu,Yong Liu
Introduction: Tomato bacterial wilt (TBW) is a destructive soil-borne bacterial infection caused by Ralstonia solanacearum. Various nanoparticles have been employed as antibacterial agents to manage TBW via soil application. However, research on the effects of nanoparticles on plant endophytes remains limited.Methods: Here, an analysis of the endophytic bacterial community was performed on healthy and infected tomatoes that were treated with Cu-Ag nanoparticles and thiodiazole-copper via high-throughput 16S rRNA gene amplicon sequencing.Results: The relative abundance levels of beneficial bacteria, including Acidobacteriota, Firmicutes, Actinobacteriota, and Myxococcota, were higher in infected tomato roots treated with Cu-Ag nanoparticles compared with thiodiazole-copper. Functional predictions show that Cu-Ag nanoparticles may affect pyruvate metabolism, oxidative phosphorylation, purine metabolism, carbon metabolism, secondary metabolite production, and the metabolic pathways associated with microbial communities.Discussion: These results could reveal the mechanism by which nanoparticles influence the endophytic microbiomes of plant roots and direct the rational application of nanoparticlesin sustainable agriculture.
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JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY
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2025
·Vol. 38
·期 1
·21-27
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IF 0.7
Rui Hou,Aojie Liu,Chao Lv,Ning Zeng,Zezheng Zhang,Siyi Liu,Qin Li,Akira Watanabe,Gang Jiang,Jinguang Cai
High-conductive ultra-thin metallic wires, as basic structures in electronic devices, are highly demanded but challenging to improve the integration level and miniaturization of the devices. In this study, an efficient laser direct writing approach was proposed and aimed at preparing Ag wires with widths as narrow as 2 μm by irradiating the AgNO3-polymer film with a compact blue-violet laser. A comprehensive exploration of various parameters was conducted, leading to the optimization of Ag wires exhibiting an impressively low resistivity of 2.35×10-7Ω·m. In addition, an Ag wire prepared by laser direct writing on the flexible PEN substrate shows high tolerance to the inward and outward bending, demonstrating excellent flexibility and mechanical stability. On this basis, a UV-light detector based on the laser-irradiated interdigitated Ag patterns and sensitive CdS nanorods was demonstrated with high sensitivity and fast response.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Yilan An,Shiping Cheng,Qiaoling Ding,Dongbo Guan,Yi Hu,Yanli Dou
Flexible sensors are essential for human-machine interfaces and bioinspired intelligent robotics, yet achieving a balance between mechanical robustness and high sensitivity at lower temperatures remains a challenge. Herein, a multifunctional hydrogel sensor (PG 2 /Ag-MOFs-XG) was fabricated through physical crosslinking of polyvinyl alcohol (PVA) and xanthan gum (XG) in glycerol (Gly) and deionized water mixture via freeze-thaw circulation and NaCl crosslinking. The in situ growth of Ag-MOFs on XG molecular chains is facilitated by the electrostatic interactions between the hydroxyl groups and the carboxyl groups of XG and Ag + , restricting molecular chain movement, thereby enhancing comprehensive properties. The PG 2 /Ag-MOFs-XG hydrogel exhibits outstanding mechanical properties across a broad temperature range, with a 101 % increase in tensile strength (from 0.583 MPa to 1.17 MPa) at 25 °C and a 112 % increase (from 0.352 MPa to 0.746 MPa) at −18 °C, compared to the pure PVA hydrogel. Additionally, it demonstrates exceptional sensitivity to stretching (GF = 3.65) and compression (S = 3.38 × 10 −2 kPa −1 ). Furthermore, the hydrogel functions as a flexible sensor for monitoring human motion, assessing industrial robot performance, and detecting the tightness of robotic components. This work offers valuable insights into the development of portable, highly sensitive, and flexible sensors for intelligent robotics.
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Journal of Materials Chemistry C
·
2025
·
IF 5.1
Xiangyang Chen,Zhensen Liang,Aodi Hu,Minggang Zhao
L-Cysteine (L-Cys), a sulfur-containing amino acid, plays a crucial role in various biological processes. Rapid and accurate detection of L-Cys in the human body is significant for clinical diagnosis and drug analysis. However, classic electrochemical sensing mechanisms are usually based on redox reactions, and substances with similar redox properties in the serum can easily interfere with the detection process. In this study, we present a novel approach for the detection of L-Cys using Schottky barriers of Ni/Cu2O/Ag nanocubes. The electrode exhibits excellent selectivity towards L-Cys due to the specific interaction between Cu2O and L-Cys through the formation of Cu–S bonds. The Schottky barrier at the Cu2O/Ag interface, formed due to the difference in work functions, impedes electron transfer and can be modulated by the adsorption of charged L-Cys molecules. The introduction of light irradiation enhances the barrier modulation capability, resulting in improved sensitivity. Experimental results demonstrate that the Ni/Cu2O/Ag electrode exhibits a linear response to L-Cys concentration within 0–2400 nM at pH 3.0 and pH 7.0, with a low detection limit of 11.86 nM. The electrode shows excellent performance in real sample analysis, exhibiting high recovery rates and low relative standard deviations. The light-assisted barrier enhancement mechanism provides a new avenue for the development of highly selective and sensitive electrochemical sensors.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Sisi Li,Shuang Li,Xiang Li,Xiaodan Zeng,Jie Chen,Zhigang Liu,Shihua Yu,Junjing Hao
Humic acid (HA) was a natural organic macromolecule, which was considered as an ideal carrier for Fenton-like catalysts due to the large number of active functional groups on its surface. For this reason, humic acid-based Fe/Ag bimetallic catalysts (Fe 3 O 4 /HA/Ag) were synthesized by introducing Fe and Ag to the humic acid carrier. The morphology and physicochemical properties of Fe 3 O 4 /HA/Ag was revealed by different characterization methods. In the optimized “Fe 3 O 4 /HA/Ag + H 2 O 2 ” Fenton-like system, Fe 3 O 4 /HA/Ag can rapidly activate H 2 O 2 and accelerate electron transfer. It was applied for sulfadiazine (SDZ) degradation and the removal efficiency reached nearly 100 %. After five cycle experiments, the degradation percentage was maintained at 88.7 %, showing excellent regeneration ability. In addition, Fe 3 O 4 /HA/Ag has good resistance to co-existing ions and different water matrices. The main active substances in the “Fe 3 O 4 /HA/Ag + H 2 O 2 ” system were hydroxyl radicals (•OH), superoxide radicals (•O 2 − ) and singlet oxygen ( 1 O 2 ), which supported by EPR and XPS analysis. This study provides a new way for the promotion of SDZ degradation through bimetallic co-catalytic activation of H 2 O 2 , which has significant potential for the treatment of antibiotic wastewater.
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Nanomaterials
·
2025
·Vol. 15
·期 14
·1088
·
IF 4.3
Xianfeng Hao,Yuehang Sun,Zongwei Liu,Gongao Jiao,Dongzhi Zhang
Ammonia (NH3) is one of the characteristic gases used to detect food spoilage. In this study, the 10 wt% Ag-NiFe2O4nanocomposite was synthesized via the hydrothermal method. Characterization results from SEM, XRD, and XPS analyzed the microstructure, elemental composition, and crystal lattice features of the composite, confirming its successful fabrication. Under the optimal working temperature of 280 °C, the composite exhibited excellent gas-sensing properties towards NH3. The 10 wt% Ag-NiFe2O4sensor demonstrates rapid response and recovery, as well as high sensitivity, towards 30 ppm NH3, with response and recovery times of merely 3 s and 9 s, respectively, and a response value of 4.59. The detection limit is as low as 0.1 ppm, meeting the standards for food safety detection. Additionally, the sensor exhibits good short-term repeatability and long-term stability. Additionally, density functional theory (DFT) simulations were conducted to investigate the gas-sensing advantages of the Ag-NiFe2O4composite by analyzing the electron density and density of states, thereby providing theoretical guidance for experimental testing. This study facilitates the rapid detection of food spoilage and promotes the development of portable food safety detection devices.
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CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Yuyu Peng,Yina Jiang,Chunyan Wang,Kelei Pang,Xiwang Li,Xiaofeng Zhou,Zhengjie Wang
Surface-enhanced Raman scattering (SERS) technique has significant advantages in the detection of gaseous small molecules, but it still faces challenges such as low adsorption capacity of gaseous small molecules on the surface of the SERS substrate, and low detection sensitivity due to the small Raman scattering cross section. In this paper, a nucleophilic addition strategy based on Ag@Au@4-nitrophenylhydrazine (4-NPH) @zeolite imidazolium ester backbone material-8 (ZIF-8) is proposed for achieving highly sensitive SERS detection of gaseous acetone. The SERS sensing platform was constructed by synthesizing Ag@Au nanoparticles with a core-shell structure modified with 4-NPH as a Raman reporter molecule, which was then encapsulated in a ZIF-8 porous framework. The nucleophilic addition reaction mechanism between acetone and 4-NPH was systematically investigated using density-functional theory (DFT), which revealed the changes in Raman spectra of 4-NPH due to the reaction and provided a theoretical basis for the specific detection of acetone. In addition, the charge transfer effect of more adsorption sites between the reaction product and the nanogold surface further enhanced the SERS signal. The constructed SERS substrate was demonstrated to have a low relative standard deviation (RSD) as low as 4.8 % for the detection of gaseous acetone, which ensured high sensitivity and reliability, and could detect at a concentration of 100 ppb. The method's excellent immunity to interference in complex exhaled gases gives it the potential to be applied to the non-invasive diagnosis of diabetes, demonstrating significant clinical applications.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Xinyi Zhong,Jinlin Wang,Litao Han,JinJin Chi,Tong Liu,Dongxing Kou,Wenhui Zhou,Zhengji Zhou,Shengjie Yuan,Yuena Meng,Yafang Qi,Qingbo Meng,Sixin Wu
In addition to open-circuit voltage (V OC ) loss, fill factor (FF) loss is considered another major factor restricting the further optimization of Cu 2 ZnSn(S,Se) 4 (CZTSSe) device efficiency. In this work, a comprehensive investigation into the loss mechanisms of FF has been conducted, and implemented a Li&Ag co-doping approach to enhance FF. The results indicate that the FF loss caused by insufficient carrier extraction is higher than that caused by non-radiative recombination. The carrier extraction capability is significantly influenced by the band alignment of the CdS/CZTSSe interface and has little relationship with the carrier concentration of the absorber. Therefore, although Ag doping reduces the hole concentration and conductivity, it reduces the FF loss caused by carrier extraction due to the improvement of band alignment. Ag doping is also superior to Li in passivating harmful defects, which helps reduce FF losses caused by non-radiative recombination. Correspondingly, Li performs better than Ag in increasing the hole carrier concentration and optimizing band alignment, greatly reducing FF losses caused by insufficient carrier transport. Finally, the Li and Ag co-doping strategy enables a 14.91% efficient kesterite solar cell with the highest reported FF to date of 74.30% through collaborative optimization of carrier extraction and suppression of non-radiative recombination.
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IONICS
·
2025
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IF 2.6
Liu Baochang,Wang Jianxin,Wang Bo,Kang Chongqing
Rechargeable aqueous zinc-ion batteries (RAZIBs) have emerged as promising candidates for large-scale energy storage systems, owing to their low cost, high safety, and environmental benignity. However, their practical application is hindered by intrinsic limitations of cathode materials, including sluggish Zn 2+ diffusion kinetics, poor electrical conductivity, and structural degradation during cycling. Herein, we report a facile hydrothermal strategy to synthesize Ag-doped MnO 2 cathode with uniform urchin-like nanostructures surrounded by nanowires as high-performance cathodes for RAZIBs. The optimal 5 wt% Ag doping yields denser nanowire arrays, namely 5Ag/MnO 2 , increases accessible active sites, and introduces lattice defects while preserving the tetragonal MnO 2 crystal structure ( I 4 /m ). The electrochemical characterization demonstrated that 5Ag/MnO 2 exhibited significantly enhanced kinetics, including lower charge-transfer resistance, reduced polarization, and higher Zn 2+ diffusion coefficient. Consequently, the 5Ag/MnO 2 cathode delivered a high initial discharge capacity of 153.4 mAh g −1 at 1 A g −1 and superior long-term cycling stability (the discharge specific capacity remained at 135.5 mAh g −1 and 88.3% capacity retention after 500 cycles). Mechanism studies via ex situ XRD, XPS, and CV reveal a reversible Zn 2+ /H + storage mechanism involving phase transformation between MnO 2 and ZnMn 2 O 4 , with mixed capacitive and intercalation behavior. The enhanced performance is attributed to Ag doping facilitating rapid ion diffusion, improving electronic conductivity, and stabilizing the hierarchical structure. This work provides a viable strategy for designing high-performance MnO 2 -based cathodes for advanced zinc-ion batteries, advancing the practical application of RAZIBs.
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Research
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2025
·
IF 10.7
Jie Zhou,Jiao Yang Lu,Zhi Xin Xie,Dong Hua Wang,Bin Sheng He,Wei Tao Huang
Polymetallic nanomaterials have important development potential by integrating the properties and advantages of their components. However, their preparation paradigm urgently needs to be updated to make full use of their characteristics to realize their multifaceted applications. In this study, multifunctional trimetallic gold–silver–chromium nanocomposites (Au–Ag–Cr NCs) were successfully synthesized, and their polymetallic plasmonic absorption properties were used in a variety of applications, from multimode and multianalyte sensing, advanced arithmetic, and reversible logic to long-text information protection. Au–Ag–Cr NCs with Au or Ag nanoparticles anchored on Cr nanobelts were synthesized using Au–Cr nanoseeds, Ag + , ascorbic acid as the reductant, and sodium dodecylbenzenesulfonate as the stabilizer. The resulting Au–Ag–Cr NCs exhibited multichannel sensing ability for 2 analytes (Hg 2+ and hypochlorite), with remarkably improved selectivity and sensitivity when analyzing combined channels. Multiresponsiveness of Au–Ag–Cr NCs to diverse substance combinations underpins input–output mapping relationships, enabling advanced molecular logic computations (such as arithmetic and reversible logic). By digitizing its intrinsic sensing and response mechanisms, advanced molecular information protection (including encoding, encryption, and information concealment) for extended text were successfully implemented. This work not only offers novel insights into the design and multifunctionality of multicomponent nanocomposites but also paves the way for a new paradigm in molecular information technology that integrates sensing, logic processing, and information security.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Caizhen Zu,Xishun Peng,Yi Long,Man Peng,Cunwei Wang,Haili Zhang,Zhangwei Tan,Yuxue He,Zhongchen Bai
Detecting antibiotic residues in food is a critical challenge for food safety assurance. This study developed a surface-enhanced Raman scattering (SERS) sensor based on two-dimensional graphitic carbon nitride (g-C 3 N 4 ) loaded with Au@Ag core-shell nanostructures (g-C 3 N 4 /Au@Ag) for detecting nitrofurantoin (NFT) residues in honey. The g-C 3 N 4 /Au@Ag thin film was fabricated by sequentially depositing g-C 3 N 4 nanosheets, Au nanoparticles, and Ag nanoparticles onto a stainless steel substrate via an electrochemical deposition method. This SERS sensor could synergistically amplify SERS signals by combining the localized surface plasmon resonance (LSPR) from the Au@Ag nanostructures with the charge transfer between the g-C 3 N 4 semiconductor and Au@Ag nanostructures. The optimized SERS sensor achieved an exceptional SERS enhancement factor of 3.8 × 10 6 for NFT in aqueous solutions, with a limit of detection (LOD) of 0.72 nM. Moreover, this SERS sensor could also recognize NFT residues in honey matrices at an LOD of 5 nM. These results provide a novel strategy for the highly sensitive detection of antibiotic residues in food safety monitoring, highlighting its potential for rapid screening of NFT residues in food.
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