RARE METALS
·
2025
·
IF 11
Jie Yang,Xin-Yan Huang,Rong-Zhi Zhao,Tong Gao,Jia-Chang Ruan,Shen-Qi Han,Lei Wang,Jin-Biao Shu,Xue-Feng Zhang
en Silver nanoparticles (AgNPs) are extensively employed for electromagnetic interference (EMI) shielding owing to their remarkable conductivity, and are commonly incorporated into polymer matrices. Therefore, the uniformity of the AgNP distribution within the polymer matrix is a crucial factor that affects the EMI shielding performance. This study demonstrates the impact of the surface morphology of AgNPs on the uniformity of the filling in electromagnetic interference shielding patches. The AgNPs were synthesized through a liquid-phase reduction process, regulating the surface shape by thermal treatment at varying temperatures. The morphology transitioned from a flower-spherical shape to a coarse-strip shape when the heat treatment temperature increased from 20°C to 250°C. The morphological alteration of the AgNPs was ascribed to the interplay between their surface effects and sintering kinetics. The results indicated that after heat treatment at 100°C, AgNPs with a spherical surface morphology demonstrated remarkably superior filling uniformity. The EMI patch containing AgNPs subjected to heat treatment at 100°C demonstrated superior EMI shielding efficacy. Its efficacy was further validated in practical electronic equipment by applying surface electromagnetic radiation scanning techniques. These findings offer significant insights into the practical design of EMI shielding patches for real-world applications using the morphology-regulated filling uniformity method. 摘要 zh 银纳米颗粒因其优异的导电性能已被广泛应用于电磁屏蔽领域,并且通常需要与高分子基体混合后使用。其中,作为填充剂的银纳米颗粒在基体中的分布均匀性是调控电磁屏蔽性能的关键影响因素之一。本研究通过液相还原法制备了银纳米颗粒,采用不同温度的热处理工艺调控其表面形貌,并系统分析了银纳米颗粒表面形貌对电磁屏蔽贴片中填充均匀性的影响。实验表明,当热处理温度从20°C升至250°C时,银纳米颗粒的表面形貌从花状球形逐渐转变为粗糙条状,这种表面形貌变化源于其表面效应与烧结动力学的相互作用。在经过100°C热处理后的银纳米颗粒具有球形表面形貌,并且展现出最优异的填充均匀性,因此,采用100°C热处理银纳米颗粒的电磁屏蔽贴片呈现出优异的电磁屏蔽性能,并进一步通过表面电磁辐射扫描法在电子设备中验证了其在实际应用中的优异性能。该研究结果为实际应用中通过形貌调控填充均匀性设计高性能电磁屏蔽贴片提供了重要参考依据。
研究领域:
材料科学
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纳米技术
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电磁干扰屏蔽
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 29
·1-11
·
IF 2.8
Wang Junru,Xia Guoxiang,Xia Longquan,Chen Yunfeng,Li Qinyuan,Zeng Hong,Yang Weiguo,Du Yongjie,He Wei,Chen Yuanming
Flexible wearable devices for health monitoring require continuous wear throughout the day, making flexible pressure sensors a critical component that has attracted significant attention. Polyacrylamide (PAM) and polyvinyl alcohol (PVA) were used as hydrogel substrate materials to fabricate wearable devices with on-the-go wearability. Helical carbon nanotubes (HCNTs) were employed as conductive fillers, with silver nanoparticles (AgNPs) deposited on their surface to enhance conductivity. The conductive HCNT/AgNPs fillers bonded with the PVA/PAM substrate via metal–hydrogen bonds, metal complexes, and Ag–O bonds. This bonding enhanced the binding strength of the gel and accelerated polymerization. Pressure sensors packaged within the hydrogel exhibited high sensitivity of 0.118 kPa –1 to minor deformations and high sensitivity of 0.0141 kPa –1 to regular deformations, providing a flexible pressure sensor with high sensitivity and fast response. This innovation delivers a highly sensitive and fast-responding flexible pressure sensor, paving the way for advanced flexible wearable electronic devices.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
Journal of Environmental Sciences
·
2026
·
IF 6.5
Xiaoyan Li,Ying Cheng,Zhuling Xu,Runfeng Chang,Jin Yan,Zejun Wang,Xuedong Wang,Huili Wang,Qiuhui Qian
● AgNPs disrupted hepatic lipid metabolism and induced ferroptosis-related toxicity. ● AgNPs induced SCD1 upregulation associated with lipid dysregulation and ferroptosis. ● SCD1 may link lipid metabolism with PPARγ pathway and ferroptosis-related injury. ● AgNPs exposure was associated with insulin resistance– and T2DM-like alterations. Silver nanoparticles (AgNPs) are widely used nanomaterials, yet their potential metabolic and hepatic risks remain insufficiently understood. In this study, we investigated the toxicological effects of AgNPs in zebrafish and explored the potential involvement of a peroxisome proliferator-activated receptor γ (PPARγ)–stearoyl-CoA desaturase 1 (SCD1)–ferroptosis–related pathway associated with lipid metabolic disturbance and type 2 diabetes mellitus (T2DM)-like metabolic alterations. AgNPs exposure induced coordinated upregulation of PPARγ and SCD1 and downregulation of glutathione peroxidase 4 (GPX4), which were accompanied by hepatic lipid accumulation, oxidative stress, and ferroptosis-related responses in larvae, as indicated by elevated reactive oxygen species (ROS) and Fe 2+ levels, glutathione (GSH) depletion, and enhanced lipid peroxidation. These alterations persisted into adulthood and were accompanied by increased body and liver weight, dyslipidemia, hyperglycemia, and impaired insulin signaling, resembling T2DM-like phenotypes. Pharmacological inhibition further supported the involvement of this pathway: the ferroptosis inhibitor deferoxamine (DFO), the PPARγ antagonist 2-chloro-5-nitro-N-(pyridin-4-yl)benzamide (T0070907), and the SCD1 inhibitor 4-(2-chlorophenoxy)-N-[3-[(methylamino)carbonyl]phenyl]-1-piperidinecarboxamide (A939572) significantly alleviated AgNPs-associated hepatic injury. Mechanistic analyses suggest that SCD1, acting downstream of PPARγ, may function as a key mediator linking lipid metabolic dysregulation to ferroptosis. Collectively, these findings provide new insight into the metabolic toxicity associated with AgNPs exposure and contribute to improved ecological and biomedical safety assessment of engineered nanomaterials. Download: Download high-res image (382KB) Download: Download full-size image
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 14
·5287-5296
·
IF 3.069
Xueshan Jing,Zhiguang Guo
Fabricating conductive materials based on sponges is applicable to many fields due to their outstanding performance. However, superhydrophobic conductive sponges are not only easily damaged by water but also have a complicated production process, which severely limit their working conditions and large-scale preparation. In this work, conductive sponges involving multiple superior characteristics of superhydrophobicity, excellent electrical conductivity, thermo-stability, and mechanical and chemical durability are fabricated based on WS2 nanosheets and modified Ag nanoparticles (M-AgNPs) via a one-step method. More importantly, when immersed in water, the resistance of the WS2&M-AgNPs superhydrophobic conductive sponge remained unchanged which is beneficial for adaptations in working conditions. In addition, in order to ensure the normal use of various sensors in the natural environment, WS2&M-AgNPs conductive sponges possessed the important ability of thermo-stability and the resistance had little change in the temperature range 0 °C to 40 °C. Even after suffering 2400 compressions, the superhydrophobic sponges recovered their original shape and retained outstanding hydrophobicity, which highly prolonged the lifetime of the pedometer. The conductive sponges retained excellent hydrophobicity in the pH range 1 to 14. It was noted that the superhydrophobic conductive sponges showed a linear relationship between resistance and compressed distance. According to this linear relation, a pressure sensor fabricated using this sponge can measure multiple parameters such as weight and depth of water. Herein, a simple preparation method is provided to fabricate superhydrophobic conductive sponges, which expands the working conditions and may be a breakthrough for traditional sensor preparation.
研究领域:
材料科学
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传感器技术
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DOI
高影响因子
Materials
·
2017
·Vol. 10
·期 6
·667
·
IF 2.654
Gang Tao,Rui Cai,Yejing Wang,Kai Song,Pengchao Guo,Ping Zhao,Hua Zuo,Huawei He
Bionanocomposite packaging materials have a bright future for a broad range of applications in the food and biomedical industries. Antimicrobial packaging is one of the bionanocomposite packaging materials. Silver nanoparticle (AgNP) is one of the most attractive antimicrobial agents for its broad spectrum of antimicrobial activity against microorganisms. However, the traditional method of preparing AgNPs-functionalized packaging material is cumbersome and not environmentally friendly. To develop an efficient and convenient biosynthesis method to prepare AgNPs-modified bionanocomposite material for packaging applications, we synthesized AgNPs in situ in a silk fibroin solution via the reduction of Ag+by the tyrosine residue of fibroin, and then prepared AgNPs–silk/poly(vinyl alcohol) (PVA) composite film by blending with PVA. AgNPs were synthesized evenly on the surface or embedded in the interior of silk/PVA film. The prepared AgNPs–silk/PVA film exhibited excellent mechanical performance and stability, as well as good antibacterial activity against both Gram-negative and Gram-positive bacteria. AgNPs–silk/PVA film offers more choices to be potentially applied in the active packaging field.Keywords:biosynthesis;AgNPs;silk;PVA;packaging application
研究领域:
材料科学
·
生物学
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DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 20
·19480-19487
·
IF 2.8
Wei Feng,Zhao Xiaole,Li Chao,Han Xiaojun
Disinfection of bacteria in water with sustainable and energy-efficient methods is still a great challenge. Herein, a novel gelatin sponge with embedded AgNPs is fabricated via freeze-drying using gelatin as the reducing agent to synthesize AgNPs in situ. UV-vis spectroscopy, HRTEM, XRD, and XPS characterization prove the formation of AgNPs with an average size of 8.55 ± 0.35 nm. TEM and SEM images confirm the even distribution of AgNPs throughout the AgNPs/gelatin sponges. The composite sponge has a low bulk density of 20 ± 3.5 mg/cm 3 and a pore size of 6.2 ± 1.5 μm. The AgNPs/gelatin sponges exhibit excellent antibacterial performance to E. coli in water, probably by destroying their cell membranes. The porous AgNPs/gelatin composite sponges are promising filter materials for water disinfection. The removal rate of AgNPs/gelatin composite sponges on E. coli reached almost 100%.
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研究领域:
材料科学
·
环境科学
·
微生物学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 9
·1393-1402
·
IF 7.571
Ming Zhao,Mingqing Zhou,Peng Gao,Xueyun Zheng,Wen Yu,Zhenyuan Wang,Jingchao Li,Jiaheng Zhang
The misuse of antimicrobials has caused a remarkable increase of antibiotic-resistant bacteria. Developing novel antimicrobial agents with high activity and low rates of resistance development is in great demand yet challenging. In this context, we developed a novel cascaded AgNPs/nGOx/Apra nanocomposite for combinational antimicrobial therapy. Glucose oxidase nanocapsules (nGOx) in the nanocomposites can convert tissue glucose into H2O2, which in turn accelerates the erosion of AgNPs into Ag+, giving rise to a synergistic antibiotic/starving-like/metal ion therapeutic effect. An in vitro antimicrobial study of the nanocomposites demonstrated rapid bacterial killing, significant bacterial growth inhibition and broad antimicrobial spectra at a low antibiotic dose. More importantly, topical and microneedle-assisted deliveries of the nanocomposites resulted in rapid scarless skin recovery in both rabbit and mouse models. This nanocomposite platform opens up a new avenue for research and clinical applications to battle against microbial infections and reduce antibiotic-resistant rates.
研究领域:
生物医学工程
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材料科学
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微生物学
·
药剂学
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Liang-Liang Chen,Wen-Pu Shi,Ya-Qing Zhou,Tuo-Di Zhang,Wen-Juan Lin,Wei-Hong Guo,Ren-Bin Zhou,Da-Chuan Yin
Infection poses a significant barrier to effective wound repair, leading to increased inflammatory responses that ultimately result in incomplete and prolonged wound healing. To address this challenge, numerous antibacterial ingredients have been incorporated into dressings to inhibit wound infection. Our previous work demonstrated that lysozyme/silver nanoparticles (LYZ/AgNPs) complexes, prepared using an eco-friendly one-step aqueous method, exhibited excellent antibacterial efficacy with favorable biosafety. To further explore its potential application in advancing wound healing, calcium alginate (CA) with good porosity, water absorption, and water retention capacities was formulated with LYZ/AgNPs to prepare composite sponge (CA/LYZ/AgNPs). As expected, in vivo experiments involving full-thickness skin wound and scald wound healing experiments demonstrated that CA-LYZ-AgNPs composite sponges with excellent biocompatibility exhibited remarkable antibacterial activity against gram-positive bacteria, gram-negative bacteria and fungi, and outperformed the wound healing process efficacy of other commercially available AgNPs-loaded wound dressings. In summary, this work introduces a CA/LYZ/AgNPs sponge featuring exceptional antibacterial efficacy and biocompatibility, thus holding promising potential in wound care applications.
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PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Yutong Huang,Yan Luo,Xiaoqing Zhang,Shanglin Li,Mei Liu
The accurate detection of carbamate pesticides popularly employed in agricultural products is critical for reducing the threat of resultant residues to human health. In this work, a regenerable nanofilm used for SERS substrate was constructed by interfacially confined self-assembly incorporating CdS nanowires (CdSNWs) and Ag nanoparticles (AgNPs). The constructed AgNPs-CdSNWs/Nanofilm could significantly enhance the Raman signals of three carbamate pesticides (metolcarb, carbaryl and aldicarb-sulfone). A broad detection linear ranged 0.001–100 mg/L was achieved. The detection limits (LOD) of metolcarb, carbaryl and aldicarb-sulfone reached 0.00081 mg/L, 0.00081 mg/L and 0.00072 mg/L with coefficients of determination of (R 2 ) of 0.992, 0.991 and 0.992, percent recovery ranged 86.5–104.9 %，88.2–105.1 % and 87.0–104.5 %, respectively, and relative standard deviation (RSD) values were all less than 4.0 %. Results showed that the user-friendly reproducible nanofilm could be employed as simple-to-establish SERS platform for rapid detection of carbamate pesticides in food.
研究领域:
分析化学
·
食品安全
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yufei Lao,Qiaoyan Wei,Suijun Xiao,Dacheng Li,Liangdong Ye,Yuling Lv,Shaorong Lu
Flexible sensors play an important role in the field of smart devices. However, most flexible sensors suffer from poor sensing signal stability and monofunction. In this study, a multifunctional film (named PM) with dual conductive network structure was fabricated by nanocellulose crystal dispersed with silver nanoparticles and carbon nanotube. The PM film exhibited excellent conductivity (24.6 S/m) along with antimicrobial effects against Staphylococcus aureus and Escherichia coli . Furthermore, the PM sensor showed excellent electrothermal performance, reaching 133.1 °C within 50 s at 12 V, and an excellent temperature coefficient of resistance (TCR = −0.65 % °C −1 ) over a temperature range of 36–124 °C. More importantly, the PM sensor demonstrated a high strain sensitivity (GF = 1.66) and durability (320 cycles), capable of detecting minute human body movements at a strain as low as 1 %. Additionally, the PM sensor maintained a stable sensing performance even after 30 d of exposure to air. Therefore, the multifunctional integration of the PM sensor shows great potential for application in the field of flexible electronics.
研究领域:
材料科学
·
电子学
·
生物传感器
·
柔性电子
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Ge Bai,Chunhua Niu,Xuexue Liang,Lan Li,Zhong Wei,Kai Chen,Klemen Bohinc,Xuhong Guo
The unpredictable release behavior of metal nanoparticles/metal ions from metal nanoparticle-loaded hydrogels, without a suitable in situ detection method, is resulting in serious cytotoxicity. To optimize the preparation and design of antibacterial hydrogels for in situ detection of metal nanoparticles , an in-situ detection platform based on the fluorescence signal change caused by the potential surface energy transfer of silver nanoparticles (AgNPs) and carbon dots (CD) through silver mirror reaction and Schiff base reaction was established. The antimicrobial test results show that the composite antimicrobial hydrogel, with lower dosages of AgNPs and CD, exhibited a higher inhibition rate of 99.1 % against E. coli and 99.8 % against S. aureus compared to the single antimicrobial component. This suggests a potential synergistic antimicrobial activity. Furthermore, the fluorescence detection platform was established with a difference of <3 μg between detected values and actual values over a period of 72 h. This demonstrates the excellent in situ detection capability of the hydrogel in antimicrobial-related applications.
研究领域:
生物医学工程
·
材料科学
·
微生物学
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Qiaoyuan Luo,Tianrui Zhou,Yuntong Liang,Yuancheng Zhang,Baofeng Lin
Green formaldehyde-free adhesives have gained attention for their eco-friendliness, though poor extreme-environment adaptability and inadequate underwater adhesion limit their practical application. This study presents a novel tannic acid‑silver nanoparticles (TA-AgNPs) in deep eutectic solvent (DES) for room-temperature autocatalytic polymerization of acrylic acid. By integrating nano-lignin (LNP) and TA-AgNPs, we constructed a dual dynamic enhancement structure through a catechol-quinone redox couple, enabling synergistic dynamic covalent/non-covalent bonding. The resulting green adhesive (TALP) demonstrates exceptional interfacial adhesion (1.3 MPa on wood) with 60-days durability under ambient conditions. The DES-mediated hydrogen-bonding network facilitates efficient interfacial water displacement, achieving underwater adhesion strength of 0.94 MPa and maintaining operational efficacy across extreme temperatures (−40 °C to 100 °C) and chemical solvents. The system exhibits a rapid recovery capability (3-s pipe leakage repair) via dynamic bond reconfiguration. Notably, the phenolic hydroxyl groups in TA synergize with AgNPs' bactericidal activity, yielding potent antimicrobial performance suitable for bacterial-prone environments. This multifunctional adhesive platform combines environmental adaptability, rapid repair, and intrinsic biocidal properties, offering transformative potential for industrial and biomedical applications under harsh conditions.
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高影响因子
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