ACS Applied Nano Materials
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2026
·
IF 5.8
Ze-Xian Chen,Yuan Zou,Ruo-Zhou Li,Yuan-Jun Song,Zong-Ru Yang,Lei Shi,Tong Zhang
The surging power density and thermal demands of advanced electronic devices necessitate conductive pastes that can undergo pressureless sintering at low temperatures while maintaining reliable performance under high-temperature operating conditions─requirements that conventional Sn-based solders can no longer meet. Cu@Ag core–shell nanoparticles offer a compelling alternative by integrating the cost-effectiveness and low electrochemical migration of Cu with the oxidation resistance of Ag. However, thermal dewetting of the Ag shell during heating significantly compromises the joint integrity and reliability. Here, we report a surface modification strategy that effectively suppresses the surface energy of Cu@Ag nanoparticles, enabling exceptional structural stability up to 250 °C without Ag shell dewetting. By incorporating surface-modified Ag nanoparticles, we formulate a bimodal conductive paste that achieves pressureless sintering at low temperatures and delivers a maximum shear strength of 20.18 MPa, which is on par with or even better than the shear strength of Cu@Ag nanoparticles sintered under a protective gas atmosphere in similar recent work. After 96 h of thermal aging, the shear strength further increased to 30.13 MPa. We performed fracture surface analysis on joints with different shear strengths and proposed a mechanism for the shear resistance of Cu@Ag paste joints at varying sintering levels. This work offers a practical and scalable approach for developing high-performance, low-cost conductive pastes and paves the way for the broader adoption of Cu@Ag-based pastes and adhesives in advanced electronic packaging.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Yaliu Jian,Wenyuan Pan,Tengfei Chen,Jinwei Luo,Hongtian Mi,CuiPing Guo,Xiangdong Xue,Mingyang Chen,Wenjun Dong
A two-step anchoring-reduction strategy controllably converts Ag 1 to Ag ACs , yielding an electronically coupled hybrid. • Coordinatively unsaturated Ag ACs sites adsorb O 2 , while adjacent Ag 1 donors raise their Fermi level above the O 2 LUMO.The elevated Fermi level enables spontaneous electron injection, O–O bond elongation, and enhanced •O 2 – generation. • Ag ACs+1 /CNs inactivates >99.9% of E. coli and S. aureus within 1.5 h under visible light at 2 μg/mL. Oxygen adsorption and activation are pivotal steps that drive the reactive oxygen species (ROS) cascade and fundamentally govern the efficacy of photocatalytic antibacterial processes. However, reconciling the distinct electronic requirements for O 2 capture and subsequent activation at a unified catalytic site remains a significant challenge. Herein, we report a hybrid-state catalyst (Ag ACs+1 /CNs), fabricated by anchoring silver single atoms (Ag 1 ) onto carbon nitride and subsequently converting part of the Ag 1 into atomically precise silver clusters (Ag ACs ). In this architecture, the coordinatively unsaturated edge Ag atoms of Ag ACs serve as oxygen adsorption sites. Simultaneously, neighboring Ag 1 sites act as electron donors, which is proposed to elevate the Fermi level of Ag ACs above the lowest unoccupied molecular orbital (LUMO) of O 2 . This elevated Fermi level promotes oxygen activation by enabling spontaneous electron injection from Ag ACs into O 2 , elongating the O O bond, and thereby facilitating the formation of superoxide radicals (•O 2 − ). As a result, Ag ACs+1 /CNs demonstrate exceptional bactericidal activity under visible light irradiation at a low concentration of 2 μg/mL, achieving over 99.9% inactivation of both E. coli and S. aureus within 1.5 h. This work presents a design paradigm for hybrid single-atom/cluster catalysts, which provides an integrated strategy to synergistically enhance adsorption and activation at unified active sites. Download: Download high-res image (180KB) Download: Download full-size image
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APPLIED CLAY SCIENCE
·
2026
·
IF 5.2
Xu Zhang,Xiaojun Wang,Yufang Zhu,Han Liang,Xuemei Sun,Na Meng
In this study, silver nanoparticles (Ag NPs) and zinc oxide nanoparticles (ZnO NPs) were co -loaded onto polydopamine-modified montmorillonite (PDA Mt) and incorporated into a konjac glucomannan (KGM) matrix to fabricate biodegradable active food packaging films. The physicochemical properties of the KGM/ZnO/Ag/PDA-Mt films were systematically characterized using XRD, FTIR, TG, XPS, FE-SEM, and EDS mapping. The results showed that the ZnO/Ag/PDA-Mt nanofillers were successfully introduced and well-dispersed in the KGM matrix. XPS analysis further confirmed the presence and chemical states of C, O, Zn, Si, Al, and Ag in the composite film. The composite films exhibited improved mechanical properties, with the 4% KGM/ZnO/Ag/PDA-Mt film showing the highest tensile strength of 18.9 MPa, which was 86.8% higher than that of pure KGM film. The films also displayed strong antibacterial activity, with bactericidal rates of ≥98.04% against S. aureus and ≥ 98.16% against E. coli . In addition, the migration amounts of Ag and Zn in different food simulants were below the corresponding specific migration limits or reference safety limits. In blueberry preservation tests, the 4% KGM/ZnO/Ag/PDA-Mt film effectively delayed fruit deterioration by reducing the weight loss rate to 13% compared with 23% for the control, maintaining fruit firmness at 1.95 N, and preserving total soluble solids at 14°Bx after 10 days of storage. These results indicate that the developed KGM/ZnO/Ag/PDA-Mt composite film has promising potential as a biodegradable active packaging material for blueberry preservation.
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Materials Futures
·
2025
·Vol. 4
·期 4
·045103
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IF 10.8
Rui Zhang,Bobo Ma,Yuqi Cui,Chengyu Tan,Bingbing Chen,Yiming Li,Jiangjian Shi,Huijue Wu,Yanhong Luo,Dongmei Li,Jianhui Chen,Qingbo Meng
CsPbI3 perovskites with suitable bandgaps ∼1.70 eV present distinct advantages for top-cell photovoltaic materials in tandem solar cells, however, relevant work has been rarely reported. This work designed a sandwich-like MoOX/Ag/MoOX (MAM) buffer layer as the front cell window layer to maximize incident light utilization efficiency for semi-transparent CsPbI3 solar cells and four terminal (4-T) stacked cells. Further investigation revealed that the MAM has to experience in-situ reaction between Ag metal and fresh MoOX, which can simultaneously ensure the transparency of the buffer layer and improve the carrier transportation and collection, except for protecting the underlying spiro-OMeTAD layer from the bombardment of magnetron sputtering. Thanks to this MAM buffer layer and a tunnel oxide passivating contact (TOPCon) bottom cell with edge passivation, semi-transparent CsPbI3 devices (aperture area: 0.50 cm2) demonstrated a power conversion efficiency (PCE) of 18.86% while corresponding 4-T CsPbI3/TOPCon tandem solar cells (PSTSCs) presented the PCE of 26.55%. Besides, we also fabricated semi-transparent CsPbI3 minimodules with 16.67% PCE and 4-T PSTSCs with 26.41% PCE (aperture area: 6.62 cm2). This work provided a new scalable strategy for transparent buffer layers by constructing in-situ generated sandwich structured buffer layer, which is suitable for perovskite tandem solar cells.
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ACS Sensors
·
2025
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IF 9.1
Jiaji Hou,Fengyan Ge,Haixia Jiang,Weiguang Liu,Chaofan Li,Xin Yan
Flexible wearable biosensors enable dynamic tracking of biomarkers in sweat through noninvasive sampling. Surface-enhanced Raman spectroscopy (SERS) utilizes the “fingerprint” vibrations of molecular vibration spectra to simultaneously analyze multiple substances, facilitating the identification of complex analytes. In this study, we integrated a Janus fabric with efficient wearable moisture management properties with silver (Ag) nanoparticles to develop an SERS sensor for human sweat detection. The hydrophobic side of the Janus fabric was designed to contact the skin, while hydrophobic patterns were printed on the opposite side to enable the efficient enrichment of target molecules. Rapid sweat transport was achieved through a combination of a hydrophilic–hydrophobic interfacial design. The moisture management capability and SERS enhancement mechanism of the platform were further explained through simulation. Moreover, the platform demonstrated the successful detection of real human sweat samples. This work is expected not only to provide a novel approach for the fabrication and preparation of the SERS active fabric with excellent performance but also to promote the theoretical basis and technical support for the research of textile on rapid detection in highly diluted biochemical samples.
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高影响因子
BIOELECTROCHEMISTRY
·
2022
·
IF 5.76
Wenjing Lai,Jiajia Li,Mingzhe Jiang,Chaoyun Ma,Chulei Zhao,Min Wang,Pengli Li,Shijie Yan,Yu Qi,Chenglin Hong
In electrochemical immunoassays, great breakthroughs have been made in ultrasensitive detection of tumor markers by amplifying signals with coreaction accelerators. Herein, carbon nitrides with nitrogen vacancies (CNNVs) are proposed as emitter, due to the introduction of nitrogen vacancies this emitter has better ECL efficiency, the phenomena of interface electron transfer and electrode passivation are improved. At the same time, it can also promote the electrochemical reduction of coreactant, making it an attractive and potential emitter. The electrode was modified with Ag-Ti 3 C 2 MXene. It not only accelerates electron transfer and increases the effective working area of the electrode, but also acts as a coreaction accelerator to promote the electrochemical reduction of the coreactant K 2 S 2 O 8 , resulting in a strong ECL signal. The immunosensor showed a good linear relationship in the range of 10 −5 -100 ng/mL with a detection limit of 0.36 fg/mL. In addition, the excellent properties of good specificity and ultra-high stability provide an effective method for ultra-sensitive immunoassays.
研究领域:
生物分析化学
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肿瘤学
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免疫学
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纳米生物技术
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分子诊断
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转化医学
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JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Xiang Jin,Jie Xie,Zuojun Ding,Zhi Li,Xuerui Wang,Xuechao Gao,Xuehong Gu
N, N-dimethylacetamide (DMAc) is a typical strongly polar aprotic organic solvent, and its recovery by pervaporation (PV) dehydration is important for production sustainability. However, maintaining a stable permeation flux remains challenge because of the pronounced competitive adsorption of DMAc versus water on membrane surfaces. To address this issue, hollow fiber supported T-type zeolite membrane was modified in AgNO 3 solution to tune its intrinsic pore structure and surface properties. The optimal modification conditions were determined as 0.5 M AgNO 3 concentration with an 8 h exchange time. The PV results demonstrated that the Ag + -modulated membrane could effectively improve the stability in DMAc dehydration. Compared to a dramatic 69% flux loss observed in the original membrane at 373 K, the flux loss of the Ag + -modulated membrane was only 7% after 30 h in dehydrating a 5 wt% water/DMAc mixture. At a lower operation temperature of 353 K, the dehydration flux remained completely stable. The improvement is attributed to the weakened competitive adsorption of DMAc molecules, achieved by reducing surface polarity after Ag + modulation. In addition, the simulated results further revealed that Ag + modulation enhanced water adsorption, thereby creating a steric hindrance for DMAc molecules near the pore entrances. These results suggested that Ag + modulation effectively improves the long-term stability of T-type zeolite membrane for DMAc dehydration, and presents a promising strategy for dehydrating the similar solvents.
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Materials
·
2026
·Vol. 19
·期 7
·1448
·
IF 3.7
Zheng Yue,Lisheng Cao,Jianxiang Ding,Shikun Ma,Yiming Cai,Haoyu Yang,Ruixiang Qiu,Jin Qian,Bo Li,Pengfei Feng,Wei Liu,Jinlong Wang,Chenghuan Huang
Ti2AlC, an important member of the MAX phase family, exhibits combined metallic and ceramic characteristics, showing potential for applications in conductive composites and high-temperature structural components. However, this phase possesses a narrow thermodynamic stability window, making high-purity synthesis challenging. Conventional solid-state synthesis requires temperatures exceeding 1300 °C, where aluminum volatilization and kinetic limitations of carbon diffusion lead to impurity phases such as TiC and Ti3AlC2. Based on the ionic transport characteristics of molten salt media, this study employed the eutectic NaCl-KCl molten salt method to synthesize Ti2AlC using Ti, Al, and TiC powders within the temperature range of 1000–1150 °C. Systematic investigations revealed that an optimized raw powder composition (Ti:Al:TiC = 1:1.10:0.95) at 1100 °C yielded Ti2AlC powders with 96.1% phase purity, high crystallinity, and typical laminated structure with stable stoichiometry (Ti/Al ≈ 2:1). Furthermore, Ag/Ti2AlC composites demonstrated excellent electrical conductivity (resistivity of 5.72 μΩ·cm) and favorable mechanical properties, validating the applicability of this synthetic route for conductive composite materials.
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高影响因子
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
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2023
·
IF 3.3
Lanpeng Guo,Hongping Liang,Dongmin An,Huimin Yang
Noble metal doping is considered to be an efficient way to promote the gas sensing performances of metal oxide semiconductor nanomaterials . In this study, uniform silver (Ag)-doped tin dioxide (SnO 2 ) nanoparticles were successfully synthesized through a facile one-step hydrothermal route. The diameter of Ag/SnO 2 nanoparticles is less than 10 nm. Compared with pure SnO 2 -based sensor, the Ag/SnO 2 -based sensors are found to effectively improve their sensitivity and selectivity to ethanol. In particular, the 6% Ag/SnO 2 -based sensor displays a high response (Ra/Rg = 135) to 50 ppm ethanol at 180 °C. The enhancement of ethanol sensing properties of the 6% Ag/SnO 2 sample due to the small size of SnO 2 and catalytic sensitization effect of Ag, as well as the Schottky barrier forms between SnO 2 and Ag. These results suggest that the Ag-doped SnO 2 nanoparticles acting as a promising functional composite material have potential application for ethanol sensors.
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BIOSENSORS & BIOELECTRONICS
·
2023
·
IF 12.6
Yuxin Li,Ping Li,Yiqing Chen,Yue Wu,Jing Wei
The low polarization and low Raman cross section characteristics of glutathione (GSH) make it challenging to directly detect GSH molecules through surface enhanced Raman scattering (SERS) technology. Development of nanostructures for indirect detection of GSH applied to the SERS platform is of great interest. Herein, silver nanoparticles (Ag NPs)/copper-polyphenol colloidal spheres (denoted as CuTA@Ag) with adjustable Ag NPs coverage are prepared by deposition of Ag NPs on the metal-polyphenol colloidal spheres via an interfacial polyphenol reduction method. The size and density of the Ag NPs deposited on the out layer can be readily adjusted by tailoring the concentrations of silver precursor. It leads to activity difference for the nanozyme and SERS characteristics. The SERS properties of the obtained CuTA@Ag are studied using oxTMB , catalytic products of nanozyme, as the probing molecules. They provide satisfactory SERS performance with a low detection limit of 10 −7 M (S/N = 3) and linear determination in the 1–100 μM range for GSH. Moreover, it is further able to detect the glutathione content in cancer cells with well accurate and reproducible capability, catching the signs of rising cancer marker levels. This work proposes structurally tunable nanomaterials platform for a catalytic-based SERS assay, which is expected to utilize the high sensitivity of SERS tool for GSH detection in the cellular environment.
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高影响因子
Biosensors-Basel
·
2023
·Vol. 13
·期 3
·330
·
IF 5.4
Jing Neng,Yazhi Wang,Yilong Zhang,Peng Chen,Kai Yang
The quinolone antibiotics represented by enrofloxacin (ENRO) are harmful to the ecological environment and human health due to illegal excessive use, resulting in increasing food residues and ENRO levels in the environment. To this end, we developed a MIPs–SERS method using surface-enhanced Raman spectroscopy (SERS) and molecularly imprinted polymers (MIPs) to detect ENRO in food matrices. Firstly, a layer of silver nanoparticles (Ag NPs) with the best SERS effect was synthesized on the surface of copper rods as the enhancing material by in situ reductions, and then MIPs targeting ENRO were prepared by the native polymerization reaction, and the MIPs containing template molecules wrapped on the surface of silver nanoparticle films (Ag NPs–MIPs) were obtained. Our results showed that the Ag NPs–MIPs could specifically identify ENRO from the complex environment. The minimum detection limit for ENRO was 0.25 ng/mL, and the characteristic peak intensity of ENRO was linearly correlated to the concentration with a linear range of 0.001~0.1 μg/mL. The experimental results showed that in comparison to other detection methods, the rapid detection of ENRO in food matrices using Ag NPs–MIPs as the substrate is reliable and offers a cost-effective, time-saving, highly selective, and sensitive method for detecting ENRO residues in real food samples.Keywords:surface-enhanced Raman spectroscopy;molecularly imprinted polymers;biosensor;enrofloxacin
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JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Junyang Zhang,Yacong Yang,Zechun Sun,Danyang Zhao,Yingxiu Gao,Tianhan Shen,Yan Li,Zongli Xie,Yuning Huo,Hexing Li
Membrane technologies offer great potential in desalination and wastewater treatment . However, the serious issue of membrane fouling results in the unsatisfactory sustainability and reusability for treating wastewater containing high level of organic foulants. In this work, a photocatalytic membrane reactor system combining Ag@BiOBr photocatalyst and polyvinylidene fluoride (PVDF) ultrafiltration with remarkable anti-fouling property was constructed. The integrated Ag@BiOBr/PVDF photocatalytic ultrafiltration membranes were prepared by blending Ag@BiOBr nanoparticles (NPs) into PVDF membrane via phase inversion method. The membrane separation performance and fouling resistance were studied in a cross-flow ultrafiltration system using bovine serum albumin (BSA) as the model foulants. Compared with the pristine PVDF membrane, the hydrophilicity and surface smoothness of composite membranes were promoted by photocatalyst-incorporation, the Ag@BiOBr/PVDF membrane with the optimal Ag@BiOBr blending content of 2.0 wt% achieved both enhanced water flux and higher BSA rejection efficiency. More importantly, the mechanism of anti-fouling and self-cleaning performances were further studied, the photocatalysis process based on Ag@BiOBr/PVDF membrane effectively decomposed the BSA foulant into broken protein with induced change of carbonyl, ionic bond and hydrogen bond contents in BSA foulants via the active radicals, weakened the intermolecular force of BSA foulants to prevent membrane pore blockage. Meanwhile, the broken protein peptide chains with more negative charges could result in the strength of electrostatic repulsive forces between BSA molecules and membrane. As a result, the BSA foulant could be stably removed in the Ag@BiOBr/PVDF photocatalytic ultrafiltration system under visible light irradiation, achieving the excellent anti-fouling performance by preventing the membrane pore blockage and foulant adhesion. We believe the Ag@BiOBr/PVDF photocatalytic membrane presented in this study will be one example among many photocatalyst-membrane combinations that can be further pursued for organic pollutants removal. In particular, we expect the theoretical support can present a great opportunity to design novel photocatalytic membranes with sustainable anti-fouling performance.
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