JOURNAL OF SOLID STATE CHEMISTRY
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2020
·
IF 2.726
Xiaolong Zhang,Hui Zheng,Shilei Jin,Yuhong Jiang,Yaxin Wang,Yang Liu
Multifunctional nanocomposites with well-defined structures and optimized electromagnetic properties are highly desirable in surface-enhanced Raman scattering (SERS) and catalytic reduction reactions. We report a novel multifunctional Fe 3 Pt–Ag nanoparticle with efficient SERS performance and excellent catalytic activity. Fe 3 Pt–Ag shows an obviously enhanced SERS effect, which is evaluated by enhanced Raman signal of Rhodamine B (RhB). Efficient SERS performance of Fe 3 Pt–Ag is attributed to the optical property of local surface plasmon resonance of Ag nanoparticles (NPs). Importantly, spontaneous catalytic reduction reactions of RhB illustrate that Fe 3 Pt–Ag possesses good catalytic performance. In combination with the theories of pseudo-first-order kinetics, catalytic reduction reactions are analysed in detail, and experimental data are in line with theoretical results. Fe 3 Pt–Ag can be easily recycled at least six times via an external magnetic field , elaborating that our developed Fe 3 Pt–Ag can be applied to protect environment as a novel composite material.
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ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Yanzhe Zhang,Xiangmei Liu,Zhaoyang Li,Shengli Zhu,Xubo Yuan,Zhenduo Cui,Xianjin Yang,Paul K. Chu,Shuilin Wu
Interfacial characteristics play an important role in infection prevention and osteointegration of artificial bone implants. In this work, both Ag nanoparticles (AgNPs) and ZnO NPs are incorporated into hydroxyapatite (HA) nanopowders and deposited onto Ti6Al4V (Ti6) implants by laser cladding. The composite coatings possess a hierarchical surface structure with homogeneous distributions of Ag and ZnO. The Ag and ZnO NPs that are immobilized by laser cladding ensure long-term and gradual release of Ag and Zn ions at low cumulative concentrations of 36.2 and 56.4 μg/L after immersion for 21 days. A large concentration of Ag released initially increases the cytotoxicity but the large initial ZnO content enhances the cell viability and osteogenetic ability. The nano Ag/ZnO-embedded HA coating (Ag/ZnO/HA = 7:3:90 wt %, namely Ag7ZnO3HA) exhibits optimal antibacterial efficacy and osteogenetic capability, as exemplified by the broad spectrum antibacterial efficacy of 96.5 and 85.8% against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), respectively, together with enhanced osteoinductivity with higher alkaline phosphatase (ALP) activity of 134.60 U/g protein compared to 70.79 U/g protein for the untreated implants after culturing for 7 days. The rabbit femoral implant model further confirms that the optimized composite coating accelerates the formation of new bone tissues indicating 87.15% of the newly formed bone area and osteointegration showing 83.75% of the bone–implant contact area even in the presence of injected S. aureus. The laser-cladded Ag7ZnO3HA composite coatings are promising metallic implants with excellent intrinsic antibacterial activity and osteointegration ability.
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ANALYTICAL CHEMISTRY
·
2026
·Vol. 98
·期 33
·24439-24447
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IF 7.3
Wang Yaqi,Zhang Ying,Zhang Yan,Ma Xue,Zheng Ting,Xu Zhiming,Zhao Suoqi,Shi Quan,Chen Zhengyu,Xu Chunming,Zhang Linzhou
Mesophase pitch is a pivotal precursor
for advanced carbon
materials,
yet feedstock selection still relies on time-consuming thermal polycondensation
and ex situ microscopy. Here we report an Ag + -induced electrospray
ionization high-resolution mass spectrometry (ESI-HRMS) strategy for
rapid screening of mesophase-forming feedstocks in complex hydrocarbon
systems. The method exploits the structural sensitivity of Ag + -induced aromatic complexation, quantified through the response
of [2M + Ag] + multicomplex ions. Model compound studies
confirmed that Ag + preferentially complexes with high-aromaticity,
short-side-chain molecules, mirroring ideal mesophase precursor features.
Across FCC slurry oils, residual oil, and supercritical fluid extraction
fractions, the [2M + Ag] + signal correlates positively
with mesophase content and with the development of ordered mesophase
texture. Collision-induced dissociation (CID) analysis further indicates
that the dominant multicomplexes adopt an “aromatic-Ag + -aromatic” sandwich-like structure and are primarily
contributed by short-side-chain 3–5-ring aromatics.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 23
·1842
·
IF 3.2
Zhang Junda,Li Chenyu,Wang Chongyan,Ke Jingli,Wang Yunpeng,Ma Haitao
With the development of advanced electronic packaging technologies, higher requirements have been placed on the service reliability of low-temperature solders. However, Bi-rich phase coarsening and excessive growth of interfacial intermetallic compound (IMC) in Sn58Bi solder restrict its engineering applications. In order to improve the microstructure and mechanical reliability of Sn58Bi solder, Ag-coated ZnO (ZnO@Ag) nanoparticles were successfully fabricated by electroless silver plating and Sn58Bi-xZnO@Ag (x = 0, 0.3, 0.5, 0.7, and 1.0 wt.%) composite solders were prepared by ball milling. The effects of ZnO@Ag addition on the wettability of solder joints, matrix microstructure, interfacial IMC growth, and shear properties were systematically investigated. The results showed that the addition of 0.3 wt% ZnO@Ag exhibited the optimal strengthening effect. Compared with the unreinforced Sn58Bi solder, the wetting angle decreased from 39.18° to 36.32°, the Bi-rich phase became finer with the number fraction of fine Bi-rich phase regions (0.1 < A ≤ 1 μm 2 ) reaching 31.78%. Meanwhile, the average thickness of the interfacial IMC decreased from 0.85 μm to 0.67 μm. Ultimately, the shear strength of the solder joints increased from 51.49 MPa to 69.62 MPa. The performance improvement may be attributed to the synergistic effects of heterogeneous nucleation, grain-boundary pinning, and interfacial diffusion blocking induced by the ZnO@Ag nanoparticles. This study demonstrates that the appropriate addition of ZnO@Ag is an effective approach for improving the reliability of Sn58Bi low-temperature solder, which can provide a reference for the design of high-reliability low-temperature lead-free composite solder.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Yihan Wu,Shanhong Wan,Shanshan Xiao,Chenxin Wang,Shaoqing Lu,Weite Meng,Mingquan Li,Lulu Huang,Khak Ho Lim,Yu Liu
Earth-abundant tetrahedrite Cu12Sb4S13 is a promising p-type thermoelectric (TE) material owing to its intrinsically low lattice thermal conductivity, yet its performance remains limited by insufficient electrical transport and the persistent trade-off between charge and phonon transport. In this study, we present a colloidal route for the scalable synthesis of Ag-substituted Cu12Sb4S13 nanocrystals and use these nanocrystal building blocks to construct bulk tetrahedrite TE materials with improved transport balance. Ag incorporation preserves the tetrahedrite framework while inducing lattice expansion, increased microstrain, local bond softening, and enhanced structural disorder, which can be retained to a meaningful extent after densification. These structural perturbations are accompanied by a marked enhancement in electrical conductivity and weighted mobility, together with a substantial suppression of lattice thermal conductivity. The optimally substituted Cu11.92Ag0.08Sb4S13 sample exhibits the best overall transport performance, reaching a lattice thermal conductivity of 0.30 W m–1 K–1 and a maximum zTmax of 1.23 at 690 K, representing an approximately 1.8-fold improvement over pristine Cu12Sb4S13, as well as competitive theoretical conversion efficiency and slightly improved hardness. These results highlight Ag-substituted nanocrystals as effective building blocks for improving the TE performance of earth-abundant tetrahedrites through coordinated control of structure and transport.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Kai Liu,Yeming He,Jiaxin Wei,Feiyang Wen,Dongxia Zhang,Zemin He,Jianxin Guo,Zhiyuan Liang,Jianjing Gao
Controllable synthesis of rough-surfaced metal nanostructures remains a critical challenge in surface materials science, as surface roughness directly determines the plasmonic, catalytic and sensing properties of nanomaterials. Herein, we report a facile lattice mismatch-directed island growth strategy for fabricating roughened Ag-Cu heterostructured triangular nanoframes with naturally roughened surfaces, using Cu nanoplates as dual-functional sacrificial templates. The intrinsic lattice mismatch between face-centered cubic Ag and Cu drives the preferential island-like nucleation of Ag atoms on the high-energy edges of Cu nanoplates, avoiding the formation of a continuous epitaxial layer. This unique growth mode generates nanoframes with abundant surface defects and dense plasmonic hot spots, while the residual Cu induces spontaneous interfacial electron transfer to form an electron-rich Ag surface. The as-prepared nanoframes exhibit 13.5-fold higher SERS activity than smooth monometallic Ag nanoplates, and show excellent performance in both aqueous dispersion and solid substrate configurations. This work provides a general and scalable approach for regulating the surface microstructure of template-derived nanostructures through lattice mismatch engineering.
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Chemistry-An Asian Journal
·
2026
·Vol. 21
·期 5
·e70666
·
IF 3.2
Naseer Ahmad,Linyue Xu,Bei Wang,Danfeng He,Siew Ling Lee,Wei Sun
Nanoplastics are a significant environmental threat due to their persistence and toxicity. In this study, we prepared a kind of Ag-doped Co 3 O 4 catalyst using a coprecipitation method, aimed at enhancing its photocatalytic degradation efficiency of polystyrene nanoplastics under UV irradiation. Morphology and component of Ag/Co 3 O 4 have been investigated by XRD, FTIR, TEM, and BET analysis. The information of absorption and energy levels for catalysts is provided by UV–vis DRS, Tauc plots, and Mott–Schottky curves. Charge-transfer abilities for catalysts have been analyzed by PL spectra and EIS. The photocatalytic activities of Ag nanoparticles (Ag NPs), Co 3 O 4 , and Ag/Co 3 O 4 have been carefully evaluated in this work. Ag/Co 3 O 4 photocatalyst exhibits the highest degradation efficiency with a kinetic rate constant of 0.0086 min − 1 , outperforming that of Co 3 O 4 (0.0062 min − 1 ) and Ag NPs (0.0036 min − 1 ). The degradation efficiencies for catalysts have also been assessed under varying pH conditions (neutral, acidic, and basic). Among them, Ag/Co 3 O 4 shows a notable degradation efficiency of 61% at pH 7, compared to 46% for Co 3 O 4 and 30% for Ag NPs. In addition, the intermediates and final products have also been discussed according to Py-GC/MS results.
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Journal of Materials Chemistry C
·
2026
·
IF 5.1
Kai Tang,Zafari Umar,Lan Jiang,Lin Wang,Huan He,Xiaoqiang Zhan,Hongli Yang,Weiyou Yang,Dongdong Zhang
Detecting ethanol is critically important due to its widespread industrial applications and potential safety hazards, posing significant risks to both industrial production and human health. However, the development of ethanol sensors with high sensitivity and selectivity remains a substantial challenge. In this study, we demonstrate a highly sensitive and selective ethanol sensor based on rationally-designed heterojunctions, fabricated by decorating In2O3 nanotubes with Ag nanoparticles (NPs) through solvothermal and coprecipitation methods. The obtained Ag/In2O3 sensor exhibits exceptional ethanol sensing performance (S = 110.5 to 100 ppm), which exhibits an approximately 11-fold enhancement compared to that of pristine In2O3, and surpasses those of most ethanol sensors ever reported. Such improvement is mainly attributed to the synergistic effects of Schottky junction formation, electronic sensitization, and chemical catalysis, which collectively enhance electron transfer efficiency and surface reaction kinetics. Moreover, the as-constructed sensor demonstrates rapid response/recovery characteristics (50/70 s), excellent selectivity against interfering gases, and remarkable long-term stability, representing its promise toward practical applications.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Jie Chen,Haifei Huan,Zitong Zhu,Yufeng Qu,Yan Ji,Menghao Wu,Qiuyang Zhang,Changjiang Pan
A natural hydrogel coating confers multifunctionality to polyurethane biointerfaces. • The synergy of CMCS and AgNPs endowed robust, long-lasting antibacterial action. • NO catalytically released by Cu²⁺ enabled superior pro-endothelialization performance. Despite its favorable mechanical properties, the clinical application of polyurethane (PU) in cardiovascular implants is severely limited by surface hydrophobicity, poor hemocompatibility, and insufficient antibacterial and pro-endothelialization functions. To overcome these limitations, we report a robust natural hydrogel coating (PU-Gel/Cu/Ag) with integrated anticoagulant and antibacterial functionalities, fabricated through the initial deposition of a polydopamine (PDA) covalent anchoring layer on polyurethane, followed by the grafting of a carboxymethyl chitosan (CMCS)/sodium alginate (SA) composite co-loaded with copper ions (Cu²⁺) and silver nanoparticles (AgNPs). A substantial decrease in water contact angle was observed for the coated PU, confirming that the coating markedly improved surface hydrophilicity. In addition, a substantial reduction in hemolysis ratio and fibrinogen adsorption was achieved with the coating, along with potent inhibition of platelet adhesion and activation, which together underscore its outstanding anticoagulant properties. Moreover, cell assays confirmed that the coating not only significantly enhanced endothelial cell (EC) attachment, expansion, and VEGF/NO expression, but also dramatically suppressed smooth muscle cell (SMC) adhesion and proliferation, highlighting its excellent pro-endothelialization and anti-intimal hyperplasia performance. Owing to the intrinsic cationic antibacterial property of carboxymethyl chitosan, combined with the synergistic action of AgNPs, the as-prepared coating demonstrated potent and sustained antimicrobial action that effectively suppressed both Gram-positive S. aureus and Gram-negative E. coli. The coating-incorporated Cu²⁺ acted as a durable catalyst that continuously drove NO production from endogenous donors, thereby synergistically augmenting both anticoagulation and pro-endothelialization. This study establishes a new paradigm for the design of multicomponent synergistic coatings, in which the coexistence of Cu²⁺ and AgNPs within a natural hydrogel matrix enables the synergistic regulation of surface wettability, catalytic NO release, and multi-target antibacterial action. This integrated approach fundamentally overcomes the limitations of previously reported single- or dual-functional coatings, offering a broadly applicable and translatable strategy for surface engineering of cardiovascular implant materials. Download: Download high-res image (228KB) Download: Download full-size image
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Gels
·
2026
·Vol. 12
·期 10
·858
·
IF 6.4
Gang Wang,Yu Wang,Yi Yang,Zhihua Cheng,Rong Liu,Lina Chang,Guangyu Zhang,Jiamu Dai,Du Nie,Chuanfeng Zang
Recoverable photocatalysts with broad optical response are of interest for practical water treatment. A 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin (THPP)/TiO2/Ag composite was prepared hydrothermally and immobilized on activated carbon fiber (ACF) aerogel by silane-assisted dip coating. The design combined potential THPP photosensitization and Ag-mediated interfacial effects with TiO2photocatalytic sites and an adsorptive, recoverable ACF support. Structural and spectroscopic characterization supported incorporation of the components and changes in optical response and emission behavior. Overall apparent methylene blue removal reached 88.7% under UV irradiation and 88.0% under xenon-lamp irradiation. The concentration profiles were approximately fitted using an apparent pseudo-first-order model. Increasing the number of immersion cycles did not further improve the photocatalytic performance. These results demonstrate adsorption-assisted dye removal using an immobilized multiphase composite. The proposed charge-transfer pathway is presented as a mechanistic interpretation rather than a directly established electronic configuration.
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Small
·
2026
·
IF 11.8
Le Jing,Yexin Pan,Yangyi Huang,Nan Xu,Siyu Chen,Haosong Zhong,Yi Chen,Yee Him Timothy Chan,Mitch Guijun Li
Nicotinamide adenine dinucleotide ( NAD + ${\rm NAD}^+$ ) is a core redox cofactor, and its concentration reflects age and metabolic state, which has driven the development of NAD + ${\rm NAD}^+$ biochemical analytical techniques. Although electrochemical techniques can rapidly and directly detect NAD + ${\rm NAD}^+$ levels, the translation of laboratory sensors into deployable solutions is often limited by the complexity of electrode interface preparation and batch-to-batch variability. Especially among enzyme-assisted methods, the multi-step biochemical immobilization and activity preservation processes are required. Therefore, developing enzyme-free and scalable NAD + ${\rm NAD}^+$ electroanalytical manufacturing strategies remains important. Here, a rapid two-step laser-induced transfer strategy is proposed to fabricate flexible silver nanoparticle–decorated carbon cloth electrodes (AgNPs@CC) for enzyme-free NAD + ${\rm NAD}^+$ sensing. This strategy reduced interfacial impedance and established a robust cathodic window for enzyme-free NAD + ${\rm NAD}^+$ detection. The electrodes exhibit a linear operating range of 10–300 , an excellent sensitivity (S = −3.16 ) at the low concentration range(10–100 ), and outstanding tolerance to typical interferents (LA, UA, AA, glucose, and NADH) and robust storage stability. This method eliminates the wet-chemical nanoparticle synthesis step and simplifies the production workflow, offering potential for applications like integration into portable sensing platforms.
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International Journal of Nanomedicine
·
2026
·
IF 8.7
Tan Wu,Xuejie Fei,Dan Xu,Qian Chen,Yang Zhang,Yuqin Jin,Yang Yang,Huanlong Qin,Fengzhou Du,Cheng Li
Purpose This study aimed to develop a nanocatalytic-microbial therapeutic platform for colorectal cancer (CRC) that simultaneously eliminates the tumor-associated pathobiont Fusobacterium nucleatum (F. nucleatum) and enhances catalytic tumor therapy.Methods An iron-based metal-organic framework (NH2-MIL-88B(Fe) composed of Fe3+ clusters and 2-aminoterephthalic acid, BDC-NH2) loaded with silver nanoparticles (NH2-MIL-88B(Fe)@Ag, denoted as MA) was constructed to integrate antibacterial activity with reactive oxygen species (ROS)-mediated tumor killing. The physicochemical properties, catalytic activity, and antibacterial performance of MA were characterized. Extracellular and intracellular ROS generation, cellular uptake, and cytotoxicity were evaluated in CRC cells. In vivo antitumor efficacy and biosafety were further assessed in a CT26 mouse colon cancer cells (CT26) subcutaneous tumor model with or without F. nucleatum inoculation.Results MA exhibited enhanced Fenton-like catalytic activity and generated more hydroxyl radicals than MOF alone in the presence of H2O2, indicating that Ag nanoparticles amplified ROS production. MA also showed potent antibacterial activity against F. nucleatum, enabling concurrent disruption of intratumoral bacteria and tumor cells. In vitro, MA induced pronounced ROS accumulation and significantly reduced CRC cell viability. In vivo, MA markedly suppressed tumor growth, with superior therapeutic efficacy in F. nucleatum-colonized tumors, demonstrating that bacterial elimination contributed substantially to tumor inhibition. No evident systemic toxicity was observed during treatment.Conclusion MA is a promising nanocatalytic platform for CRC therapy that combines direct antibacterial action against F. nucleatum with amplified ROS-mediated tumor cell killing. This dual-target strategy offers an effective and biocompatible approach for CRC treatment by integrating microbiota intervention with nanocatalytic therapy.
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